Tecumseh and Peerless Transmission Manual


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®
This manual covers all Tecumseh Peerless gear products as follows:  
T E C H N I C I A N ' S H A N D B O O K  
100 Series Differentials  
915/940 Series Transaxles  
920 Series Transaxles  
930 Series Transaxles  
1000/1100 Series Right Angle/T-Drives  
1200 Series Transaxles  
1300 Series Transaxles  
2300 Series Transaxles  
2400 Series Transaxles  
2500 Series Transaxles  
2600 Series Transaxles  
VST Transaxles  
MST200 Series Transaxles  
3
6
6
7
7
8
8
9
9
00 Series Transaxles  
00 Series Transaxles  
01 Slow Speed Transaxle  
00 Series Transmissions  
00H Series Transmissions  
00/801 Series Transaxles  
20 Series Transmissions  
00 Series Transaxles  
10 Series Transaxles  
Other illustrated Tecumseh 2-Cycle Engine, 4-Cycle Engine and  
Transmission manuals; booklets; and wall charts are available  
through Tecumseh.  
TECUMSEH & PEERLESS  
TRANSMISSION and DRIVE PRODUCTS  
For complete listing write or call  
ENGINES & TRANSMISSIONS  
7
40045  
TecumsehProductsCompany  
Engine&TransmissionGroup  
Tecumseh Europa S.p.A.  
Strada delle Cacce, 99  
10135 Torino, Italy  
9
00 North Street  
ENGINES & TRANSMISSIONS  
Grafton, WI 53024  
Phone: 262-377-2700  
FAX: 262-377-4485  
Tel. 011 39 11 391-8411  
Telefax 011 39 11 3910031  
www.TecumsehPower.com  
Form No. 691218 R 3/02  
Litho in U.S.A.  
IMPORTANT NOTICE!  
SAFETY DEFINITIONS  
Statements in this manual preceded by the following words  
are of special significance:  
or  
WARNING indicates a potentially hazardous situation which  
if not avoided, could result in death or serious injury.  
NOTE  
Refers to important information and is placed in italic type.  
It is recommended that you take special notice of all items  
discussed on each page and wear the appropriate safety  
equipment.  
TABLE OF CONTENTS  
Page  
CHAPTER 1  
Model Overview and Terms Used...................................................................................... 1 - 6  
Lubrication Chart .....................................................................................................................7  
Torque Values Chart ................................................................................................................8  
Identification.............................................................................................................................9  
Trouble Shooting Table ...................................................................................................10 - 12  
CHAPTER 2  
00 Series Transaxles.......................................................................................................... 13  
CHAPTER 3  
3
6
00 Series Transaxles................................................................................................... 14 - 18  
01 Slow Speed Transaxle................................................................................................... 19  
6
CHAPTER 4  
7
00 Series In-Line Shift Transmission............................................................................21 - 25  
00H Series Transmissions ...........................................................................................26 - 29  
7
CHAPTER 5  
8
00/801 Series Transaxles.............................................................................................30 - 36  
20 Series Transaxles....................................................................................................37 - 41  
8
CHAPTER 6  
900 Series Transaxles................................................................................................... 42 - 46  
CHAPTER 7  
910 Series Transaxles....................................................................................................47 - 50  
CHAPTER 8  
915 Series / 940 Series Transaxles ...............................................................................51 - 55  
CHAPTER 9  
9
20 Series Transaxles....................................................................................................56 - 60  
CHAPTER 10  
9
30 Series Transaxles....................................................................................................61 - 65  
CHAPTER 11  
MST200 Series Transaxles ............................................................................................66 - 70  
Checking Oil Level.................................................................................................................71  
CHAPTER 12  
200 Series Three-Speed Transaxles............................................................................72 - 74  
1
CHAPTER 13  
1
300 Series Hydrostatic Gear Reduction Differentials ...................................................75 - 77  
CHAPTER 14  
2
300 Series Four-Speed Transaxles..............................................................................78 - 84  
CHAPTER 15  
2
400 Series Hydro Powered Transaxles ........................................................................85 - 87  
CHAPTER 16  
2
500 Series Hydro Powered Transaxles ........................................................................88 - 92  
CHAPTER 17  
2600 Series Hydro Powered Transaxles ........................................................................93 - 97  
CHAPTER 18  
Differentials ..................................................................................................................98 - 103  
CHAPTER 19  
Drives .........................................................................................................................104 - 108  
CHAPTER 20  
1
100 Series Drives ..................................................................................................... 109 - 113  
CHAPTER 21  
Shifting Assembly....................................................................................................... 114 - 116  
Shift Key Quick Reference Guide........................................................................................ 117  
CHAPTER 22  
Bearing and Bushing Service ..................................................................................... 118 - 119  
CHAPTER 23  
VST Troubleshooting ..................................................................................................120 - 121  
C
Tecumseh Products Company  
002  
2
CHAPTER 1. MODEL OVERVIEW AND TERMS USED  
TECUMSEH/TRANSMISSIONS UNITS  
900 Series This unit is similar to the 800 series transaxle  
with the added feature of 2, 3, or 4 speeds forward  
and 1 reverse.  
GENERAL  
Manufactured since 1945, Tecumseh/Peerless gear  
products are found in many products worldwide.  
Applications vary from industrial products to residential  
and commercial lawn and garden equipment.  
9
10 Series The 910 series transaxle offers a forward  
and reverse unit. The speed changes with the use of a  
variable-drive pulley arrangement.  
9
15/940 Series This unit has 3 to 5 speeds forward  
This book is intended for use by properly trained  
technicians that have appropriate facilities and the proper  
tools. If you are not a Tecumseh trained technician, DO  
NOT attempt a repair. Consult an Authorized Tecumseh  
Servicing Dealer.  
and 1 reverse. Reverse is gear driven instead of chain  
driven and the case is contoured around the gears.  
920 Series The 920 series offers 3 to 7 speeds forward  
and 1 reverse. The shifter/brake shaft is similar to the  
8
00 series shifter/brake shaft.  
IDENTIFICATION OF MODELS  
All units manufactured since 1964 have identification  
numbers located on an attached tag or are stamped  
into the case. This information is required to obtain parts  
or replacement units. We have included illustrations on  
page 9 of this book to assist you in locating them.  
930 Series This unit has 3 to 7 speeds forward and 1  
reverse. The transaxle is very similar to the 920 series  
except the differential and shifter/brake shaft are different.  
The MST Series The MST (Manual Shift Transaxle)  
is a sealed unit which uses 16 oz. (473 ml) of 80W90  
gear lube (part #730229B). The MST series is available  
with up to 6 speeds forward and one reverse and has  
a contoured case and cover.  
TRANSAXLES  
The term transaxle is a combination transmission and  
differential in one case. Tecumseh transmissions and  
transaxles are manufactured in many different gear  
ratio combinations from one to seven forward speeds  
with one reverse.  
1
200 Series The distinguishing feature of the 1200  
series transaxle is that the axle support housings are  
pressed in from the inside of the case and cover. Therefore  
they are not readily removable until the unit is completely  
disassembled. The case is cast iron for rugged, longtime  
use.  
6
00 Series The 600 series is a lightweight transaxle  
used in riding mowers or similar applications. The 600  
series has a vertical input shaft at the top of the aluminum  
case. Variations in the series (which determine the  
specific model number such as 603, 603A, 609 etc.)  
include:  
2
300 Series Generally similar to the 1200 series  
transaxle. The distinguishing features are a more massive  
case and a larger shift lever opening machined area.  
The obvious difference from the standpoint of application  
is that these units have four speeds forward and will  
be found on equipment that can be used with ground  
engagement operations.  
1.  
2.  
3.  
4.  
5.  
Shift lever shape.  
Axle lengths.  
Axle machining for wheel hub attachment.  
Axle housing variations.  
Size of the brake shaft.  
NOTE: The 1200 and 2300 series transaxles are fairly  
similar in appearance, but do have recognizable  
characteristics. Both of these units have cast iron  
cases for rugged applications, although the 2300  
series is the only unit that can be used with ground  
engaging applications.  
There may be other slight differences, however, these  
are present as a result of product improvement which  
are not options to an O.E.M. (Original Equipment  
Manufacturer).  
8
00 Series This unit has 3 to 6 speeds forward and 1  
reverse. This transaxle features bronze oil impregnated  
bushings with needle bearings or ball bearings on the  
axles, input and output shafts.  
8
20 Series With 2 to 6 speeds forward and 1 reverse,  
this transaxle is built for heavy duty applications including  
use with ground engaging attachments. Sleeved needle  
bearings are used in place of oil impregnated bushings  
on all shaft ends and ball bearings are standard on  
the axles. The 820 also features steel cut gears for  
maximum durability.  
1
HYDROSTATIC GEAR REDUCTION AND  
DIFFERENTIAL UNITS  
Right Angle Drives These units consist of input shafts,  
output shafts, and the beveled gearing necessary to  
change the direction of power at right angles. If the  
bevel gear (drive gear) on the input shaft is turned around  
and moved to the other side of the case (opposite end  
of the shaft), the output shaft will rotate in the opposite  
direction.  
GENERAL  
These units do not have a transmission function  
characteristic of transaxles, but rather, are designed  
to reduce input speed to a suitable axle speed and  
torque range. The hydrostatic units which mate to these  
units perform the transmission function.  
A cover identifies each unit as being either a left hand  
(
LH) or a right hand (RH) right angle drive. The cases  
and bearings are identical in both drives.  
1
300 Series This unit is the hydrostatic counterpart  
of the three-speed forward unit (1200). It has an aluminum  
casing and pressed-through axle support housings,  
which is characteristic of the 1200 series. The  
T” Drives The “T” drive is essentially the same as  
the right angle drive except that the input shaft extends  
out the other side of the case to transmit power in the  
same line to additional right angle drives or other  
equipment.  
®
hydrostatic pump is made by Eaton Manufacturing  
and is not serviced by Tecumseh Service Dealers.  
2
400, 2500 & 2600 Series This series of hydrostatically  
Shafts, Couplings, Pulleys, etc. These items are  
part of complete units and are used to connect angle  
drives, and other attachments. The serrated couplings  
match the serrations on the shafts of the angle drives  
and connecting shafts.  
driven reduction gear and differential units can be used  
in ground engaging operations such as plowing. The  
®
hydrostatic pump is manufactured by Sundstrand Corp.  
TRANSMISSIONS  
Transmissions manufactured by Tecumseh consist of  
a shifting mechanism to take a constant input shaft  
speed and reduce it to the desired output speed.  
Transmissions need a belt drive or chain drive/differential  
assembly to deliver power to the wheels.  
TERMS USED  
AXLE - The shaft which connects the wheel or hub to  
the differential unit and transmits force back to the  
wheels.  
7
00 Series This unit can be 2, 3, 4, 5 & 6 speeds  
forward and 1 reverse. The brake system can be mounted  
on either side of the unit.  
AXLE HOUSING (or AXLE SUPPORT) - An extension  
of the case and cover to support the outer ends of the  
axles. Because the housing is visible, it is often the  
best means of distinguishing the series in question.  
7
00 “H” Series This unit is built with almost all  
interchangeable parts within its two cases except with  
an “H” shift pattern. This unit has 3 or 4 speeds forward  
and 1 reverse.  
BEARING BLOCK (Strip) - Used to support the ring  
gear of the differential.  
DIFFERENTIALS  
BEVEL (on a gear) This is a chamfer or roundness of  
the meshing side of the gear teeth to permit easy  
shifting. For instance, with "H" shift pattern transaxles,  
this is about the only allowance that can be made to  
make shifting easier. Input power should be stopped  
before shifting to keep these spur gears from developing  
wear.  
The 100 series is a self-contained differential/axle unit.  
It features hardened or non-hardened axle shafts of  
various lengths and is machined with many variations  
for hub attachment. The case is cast aluminum and  
the differential gears are sintered metal (powdered metal)  
or cut steel. The differential pin is held in place by the  
four retaining cap screws. Oil Lite bushings reduce  
friction during differential operation. The drive sprocket  
is part of the unit which, depending upon the application,  
can be of several diameters in size thus having a different  
number of gear teeth. This sprocket is often supplied  
by the O.E.M.  
BEVEL GEAR - A gear with teeth ground on a diagonal  
so that when it meshes with a second bevel gear, power  
o
is transmitted at an angle. If the angle is 90 , the gear  
is known as a MITER GEAR.  
BEVEL PINION - The smaller of two meshed bevel  
gears in a gear train.  
ANGLE DRIVES  
These units are used primarily to change the direction  
of drive at the point where the working equipment  
attaches. They can be assembled for right or left hand  
rotation so that they can be used in various  
combinations for synchronous operation.  
BRAKESHAFT/SHIFTER BRAKESHAFT) - The shaft  
on a unit (Transaxles or Transmission) to which a braking  
system may be attached. It is usually larger in diameter  
than the input shaft due to its function of taking shock  
loads experienced in braking.  
2
CASE - That bottom half of the gear box which contains  
the shift lever , axle and brake shaft openings. The  
other half is the COVER. Unit reassembly is normally  
done into the case with variations listed by individual  
model.  
INPUT OR INPUT SHAFT - The part of a unit which is  
always connected to the drive. Its rotational speed is  
dependent on the driving mechanism. The input shaft  
brings power to the unit.  
LIMITED SLIP DIFFERENTIAL - See DUO-  
CHAMFER - In gear products, chamfers provide two  
main functions. The first is to reduce gear wear at the  
leading contact point as two gears mate. The second  
purpose is to act as a ramp for shifter key compression  
through the shift washer prior to gear engagement.  
The chamfer in the washer is either stamped or  
machined in.  
TRAK™ DIFFERENTIAL.  
MITER GEAR - One of a pair of interchangeable bevel  
gears with axles at right angles. Since all bevel gears  
are miter gears, the terms can be the same.  
MODEL NUMBER - The identifying number of a unit  
which will permit selection of the proper parts to repair  
that unit.  
COUNTERSHAFT - A splined shaft which hold spur  
gears that are in constant mesh with shift gears and  
transfer input power to the shift gears.  
NEUTRAL SPACER - A single or split collar between  
forward and reverse gears that the shift keys engage  
into when the unit is in neutral.  
COUPLING - A sleeve to connect two serrated or splined  
shafts in the same axial plane. Used in right angle  
drive systems, 700 series, output shafts or in a  
hydrostatic drive connecting the pump and motor to  
the gear drive of a transaxle.  
OIL SEAL, SINGLE LIP/DOUBLE LIP - An oil seal  
with one or two sealing surfaces to prevent entrance  
of foreign matter and leakage of lubricant.  
OIL SEAL, (SQUARE CUT O-RING)- A seal with two  
external and two internal sealing surfaces. Used in  
the shifter housing.  
COVER - The top half of a horizontally parting gear  
box such as 700,800,900 and MST models. The cover  
normally contains the input shaft, bearing(s) and the  
input bevel gear. The shaft may change location in  
the cover based on the OEMs mounting position.  
OUTPUT, OR OUTPUT SHAFT - On a transaxle, the  
shaft that contains the output pinion which is in direct  
mesh with and drives the differential. The output shaft  
on a transmission contains the sprocket for driving  
the axles. The output shaft is driven by the large OUTPUT  
GEAR.  
DIFFERENTIAL GEAR BOLTS - Through bolts holding  
the differential parts together. The heads of these bolts  
must be opposite the output shaft gear (except in the  
2
400 series). This is an early check to see that the  
unit is being assembled correctly.  
OUTPUT SHAFT GEAR - The importance of defining  
this gear is to point out that it must be opposite the  
differential bull gear (except the 2400 series).  
DOWEL PIN - An alignment pin used to align the case  
and cover and other parts in a transmission or transaxle.  
The dowel pins should be installed to hold the parts in  
alignment before tightening the retaining screws. Failure  
to install dowel pins first will usually lead to a unit that  
binds after assembly.  
GEAR REDUCTION AND DIFFERENTIAL UNIT - A  
unit that reduces a high R.P.M. input speed to a suitable  
axle speed without the use of a transmission. Since  
there is a single gear train, there is a single input  
speed to output speed ratio, however, axle speeds  
are infinite, depending upon input speed.  
DUO-TRAK™ DIFFERENTIAL (Trademark -Illinois  
Tool Works) - A type of differential which increases  
torque to the tractive wheel to keep it turning. However  
in situations where differentiation is necessary (as in  
turning), the unit acts much like a regular differential.  
REVERSE IDLER (915 Series) - The gear located  
between the reverse gear of the countershaft and the  
reverse gear of the shifter/brake shaft that allows the  
drive to operate in the opposite direction.  
EQUIPMENT - The complete assembled product (riding  
mower, tractor etc.) which uses of the drives listed in  
this manual.  
REVERSE IDLER - A gear added to the gear train so  
when in mesh, the direction of all gears driven after it  
is reversed. Its number of teeth also affects the reverse  
gear ratio. The center gear of the three gear cluster is  
always in mesh with the REVERSE IDLER, and the  
large shifter gear always shifts into it.  
HEAD ASSEMBLY - A complete unit containing all  
parts of one right angle or “T” drive assembly of a right  
angle drive system. The head assembly is permanently  
lubricated and sealed.  
RIGHT ANGLE DRIVE / HEAD ASSEMBLY. The major  
operating parts are a pair of miter gears. The assembly  
consists of other right angle or “T” drive head assemblies  
and connecting hardware.  
IDENTIFICATION NUMBER - See MODEL NUMBER  
IDLER - A gear used in a gear train to transfer motion  
or direction. The gear rotates independently of the shaft  
upon which it is located.  
3
SEAL - A material which prevents lubricant from leaking  
SHIFTER HOUSING (600/2300's) - This housing  
contains the shift lever and must be re-installed in the  
proper position to function correctly. If the housing does  
not already have guide marks, scribe the shifter housing  
and transmission case before removal.  
past a rotating shaft. It can be a rubber or square cut  
"
O"-ring, a sealing-type ball bearing, or most commonly,  
a rubber sealing surface encased in a metal form.  
SEAL RETAINER - Found on some models of transaxles  
and on right angle drives.  
SHIFTER ROD - One of two similar smooth rods of  
equal length with grooves which match the fork  
positioning with meshed positions of the shifter gears  
and those of the three gear cluster. Each rod has a  
snap ring to act as a fork stop, but can also be used  
to determine how the fork is assembled to it.  
SHIFT COLLAR - A round collar which retains shift  
keys onto the shifter/brake shaft. The shifter assembly  
pin (or pins) slide into the groove on the collar to move  
the shift keys.  
SHIFT GEARS - The gears on the shifter/brake shaft  
that are in constant mesh with the spur gears of the  
counter shaft. The shift gear is engaged by the shift  
keys and it's size determines the speed of output by  
the axles.  
SHIFTER SHAFT - A splined shaft which meshes with  
the internal splines of the shifter gears, to transmit  
force to the output shaft gear. On in-line transmissions  
and transaxles the shaft has machined channels to  
accommodate the shift keys.  
SHIFT KEY - One of either two or four metal spring  
steel keys, which are held in the keyways of the shifter/  
brake shaft by a shift collar. The shift keys are used  
to slide through the shift gears and engage the desired  
gear or speed.  
SHIFTER STOP (600/2300's) - A stamped metal plate  
which separates the shifter forks. The stop has a notch  
cut in it which corresponds to the neutral position on  
the shifter forks and rod. The shifter lever must return  
the engaged fork back to neutral before it can actuate  
the other fork.  
SHIFT KEYWAY - One of either two or four slots in  
the shifter/brake shaft for the shift keys to slide through  
for gear selection.  
SPROCKET - A geared wheel designed to turn a chain  
drive. Sprocket diameters vary and are available in  
different sizes for changing output ratios.  
SHIFT WASHER - The shift washer provides a ramp  
to gradually compress the shift key prior to engagement  
with the gear. We have used two types in production;  
the newer style has the chamfer stamped into the  
washer. Earlier production washer’s had the chamfer  
machined in.  
SPUR GEAR - A gear having the shaft bore and teeth  
in a parallel plane.  
“T” DRIVE - A right angle drive with an input shaft  
extending thru the case to transmit power axially in a  
second direction to the right angle output. On “T” drives  
with dissimilar input and output ends, care must be  
taken to insure that the parts do not run in reverse  
when reassembled.  
SHIFTER ASSEMBLY - Consists of a shift rod, shift  
fan, shift arms and shift pin or pins.  
SHIFT LEVER - The lever by which the operator manually  
changes the shifter gears to vary reduction speed ratios  
in the transmission. The configuration of the lever is  
variable and is often the only reason for a unit being  
given a new model number.  
THREE GEAR CLUSTER (2300) - A three gear assembly  
in mesh with the input shaft. The gears are of different  
sizes to change gear ratios when meshing with the  
two shifter gears.  
SHIFTER FORK - A mechanical arm which is connected  
to the shifter rod to position the shifter gear at an exact  
spot axially along the shifter shaft.  
THRUSTER RACE - A thrust washer in which the outer  
edge is cupped to fit the outer diameter of a thrust  
bearing. This fit positions the thrust race concentric  
with the axle diameter. It further acts as a thrust washer.  
SHIFTER GEAR, LARGE (600/2300) - This gear  
transmits 1st gear, reverse gear (and 2nd gear in 4-  
speed units) ratio force to the output shaft. It is beveled  
on both sides.  
THRUST WASHER - A flat polished surface separating  
metals of different hardness. It also acts as a spacer  
between shafts and the case and cover.  
SHIFTER GEAR, SMALL (600/2300) - This gear  
transmits 2nd and 3rd (3rd and 4th in a 4-speed unit)  
gear ratio force to the output shaft. It can have two  
different beveled tooth diameters or it can have a beveled  
spline to engage 3rd (or 4th) gear through an additional  
splined shaft.  
TRANSMISSION - A system of varying sized gears  
in a case, some of which can be moved along a shaft  
to vary the gear ratio in a unit. The net effect is to  
change speeds to the rear wheel according to the type  
of work being done.  
UNIT - A general term for Tecumseh/Peerless  
Transmission products.  
4
3
. Remove the shift housing and drain the lubricant  
from unit. Observe the old lubricant to see if metal  
particles are present.  
GENERAL SERVICING PROCEDURES  
The following service procedures should be understood  
and practiced whenever service is needed on a  
Tecumseh transmission or drive product.  
4
. Check axle shafts carefully for smoothness. Use  
crocus cloth or a Scotch-Bright™ pad to rub down  
high spots and eliminate rust or paint from the shafts.  
It is recommended that you take  
WARNING  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
5. Check the model and specification number and  
remember to have the exploded parts diagram  
accessible during disassembly.  
6
. Have on hand seal protectors, drivers, shop cloths,  
appropriate tools and this technicians handbook  
while servicing a unit.  
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
OIL LEAKS, SEAL AND GASKET SERVICE  
Tecumseh units contain various styles and sizes of  
oil seals. The function of any oil seal is to seal inward  
to prevent lubricant leaks and prevent outside debris  
from entering the unit. Seals can be single lipped  
with the sealing edge facing inward or double lipped  
sealing inside and out.  
Before removing a unit (Transmission product) from  
any equipment, look for and ask the customer about:  
GUIDELINES TO REMEMBER  
1
2
3
. Loose, worn or glazed drive belts.  
. A misadjusted or badly worn clutch or belt tension.  
. Loose/lost set screws and or sheared keys in drive,  
driven pulleys or axle.  
1
. Other than leaking seals, gaskets and “O” rings,  
leakage can occur due to a cracked case or cover,  
flats on shafts, porosity (rarely, if ever), and worn  
bushings and shafts.  
4
. Oil saturated drive belts or clutches.  
. Bad operating habits, such as clutch riding or not  
clutching when shifting.  
5
2
3
4
. Replace ALL seals/gaskets if disturbed. The small  
cost of installing new seals is small in comparison  
to a dissatisfied customer and the cost of rework.  
6
. Oil leaks.  
7
. If possible operate the equipment to help isolate  
the problem.  
. Some seals have a "Redicoat" sealant applied,  
while others may need a thin coat of RTV silicone  
to the outer shell upon installation.  
8. Review Service Bulletin 304.  
Removal of the unit from the equipment:  
1
. Raise the equipment so the transmission or transaxle  
is accessible. Use wood blocks to prevent  
equipment from shifting. Do not use bricks, cement  
or cinder blocks.  
. The surface over which the seal makes contact  
must be free of all cuts, scratches, high spots and  
rust. The shafts should be smooth, shiny and a  
thin film of light oil applied. Seal protectors must  
be used to clear keyways, splines, or other machined  
sharp edges on the shafts.  
2
. Visually inspect the Tecumseh unit for oil leaks, a  
cracked housing, binding or rubbing of parts, or  
other symptoms of malfunction.  
3
. Use a jack under the unit to support it’s weight  
when attachments are removed.  
TORQUE VALUE TROUBLESHOOTING  
GUIDELINES  
4
. Remove wheels, drive belts, pulleys, chains and  
other associated equipment from the unit. Be aware  
of positioning of parts. Use a scribe mark, if in  
doubt, to reassemble parts quickly and accurately.  
. If the shifter lever will interfere with removal of the  
unit in anyway, remove it before unit removal. These  
can easily be bend out of shape.  
ALWAYS torque all fasteners to the appropriate value  
as listed in Chapter 1 page 9.  
5
6
7
Over-tightening can strip the threads in the cases or  
on a fastener. It also can over-compress gaskets,  
and possibly cause binding in the unit.  
. Remove all attached hardware holding the  
Tecumseh/Transmission unit to the equipment on  
the case, cover, axle supports, brake and shifter.  
. Remove the unit from the equipment.  
A cross-tightening sequence to half the torque then  
finally to full torque value is a recommended procedure  
to prevent comebacks (repair returns).  
Preparing for disassembly of a unit:  
Under-tightening fasteners can cause oil leakage,  
loosening of attaching parts, and possible shifting of  
the internal parts which may bring about a complete  
failure.  
1
. Visually inspect for evidence of oil seepage,  
tampering, misalignment, freedom of rotating shafts,  
etc.  
2. Clean the unit thoroughly of any dirt, oil and debris.  
5
BASIC TESTING  
The absence of binding and oil leakage are the best  
indications that the unit has been properly reassembled.  
Though other, more elaborate tests can be done, the  
following procedures are accurate and the preferred  
method for a quick check of the unit.  
On an "H" shift pattern drive with the shift forks in  
neutral, rotate both axle ends in the same direction.  
They should turn smoothly although a little effort may  
be necessary. The brake shaft should rotate whenever  
the axles turn together, but in neutral, the input shaft  
should not turn. By moving any shifter gear into mesh,  
a greater drag should be felt on the axles, and both  
the input and brakeshaft should turn. For ease in turning  
the various shafts, insert a tool (such as a punch or a  
socket head screw key) into the keyway, however, do  
not force if the shaft is binding.  
Potential reasons for binding in the unit could be:  
1
2
3
4
. Gaskets were left out on reassembly or installed  
incorrectly.  
. Oil seal retainers, differential, thrust washers, shifter  
stop or oil seal retainers were installed improperly.  
. The shifter assembly or spacers were installed  
incorrectly.  
. Foreign matter could be blocking the gear teeth  
that are in mesh.  
5. The input shaft was not properly seated in the case.  
6. The case and cover could be mis-aligned (dowel  
pins were missing).  
7
. The bearing(s) do not have the lock tabs or notches  
in the correct position.  
For more information, consult the troubleshooting  
section.  
6
LUBRICATION CHART  
Check the Transmissions unit model and specification number before filling with lubricant. There may be a  
difference in the quantity recommended. This is dictated by the design of the vehicle and position of the  
transmission unit installed.  
Model  
No.  
Model  
No.  
Model  
Quantity  
Sealed  
24 oz./710 ml Oil  
30 oz./887 ml Grease  
36 oz./1065 ml Grease  
36 oz./1065 ml Grease  
26 oz./769 ml Grease  
18 oz./532 ml Grease  
Quantity  
No.  
Quantity  
3
00  
700  
12 oz./355 ml Grease  
12 oz./355 ml Grease  
All Models  
Except *  
*1408-P91  
*1409-P91  
*1410-P91  
*3002  
6
8
8
8
9
9
00  
00  
01  
20  
00  
10  
700H  
2800  
4 oz./118 ml Grease  
3 oz./89 ml Grease  
*3003  
9
15/940 10 oz./296 ml Grease  
*3028  
9
9
20  
30  
30 oz./887 ml Grease  
30 oz./887 ml Grease  
48 oz./1420 ml Oil ††  
*3029  
*3035  
1
200  
305  
309  
313  
301  
302  
303  
304  
306  
307  
308  
310  
311  
312  
314  
315  
316  
317  
318  
320  
321  
322  
325  
328  
329  
319  
323  
326  
327  
1000 Series 6 oz. / 180 ml  
SAE E.P. 80W90 Oil  
16 oz./473 ml Oil  
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
32 oz./946 ml Oil  
1100  
DIFFERENTIALS  
All Models 3 oz./89 ml Grease  
TWO SPEED AXLE  
All Models 2 oz./59 ml Grease  
THREE SPEED AXLE  
All Models 2 oz./59 ml Grease  
44 oz./1301 ml Oil  
NOTICE  
Grease: Bentonite Grease  
Part Number 788067C  
Oil: SAE E.P. 80W90 Oil  
Part Number 730229B  
† Refer to O.E.M. Technician’s Manual for  
type of lubricant and capacity system  
24 oz./710 ml Oil  
† To be filled through shift lever opening  
MST  
16 oz./473 ml Oil  
2300  
2400  
2500  
2600  
64 oz./1892 ml Oil  
32 oz./.946 ml Oil  
7
TORQUE VALUES CHART  
MODELS  
PART  
AFFECTED  
IN-LBS  
FT-LBS  
NM  
Bolt 5/16-18 (Housing)  
Nut 5/16-18 (Housing)  
100 Series  
100 Series  
228-264  
120-156  
19-22  
10-13  
25.8 - 29.9  
13.6 - 17.7  
Bolt 1/4-20 (Case to Cover)  
600 Series  
600 Series  
84-108  
7-9  
9.5 - 12.2  
Bolt 5/16-18 (Axle Support Housing)  
156-180  
13-15  
17.7 - 20.4  
Bolt 1/4-20 (Shift Lever Housing)  
Bolt 1/4-20 (Brake Disc)  
600 Series  
600 Series  
84-108  
84-108  
7-9  
7-9  
9.5 - 12.2  
9.5 - 12.2  
Bolt 1/4-20 (Case to Cover)  
800 & 900 Series  
(
Except 820)  
90-100  
85-110  
7.5-8.3  
7.1-9.2  
10.2 - 11.3  
9.7 - 12.5  
Bolt 1/4-20 (Brake Disc)  
800, 900 & MST Series  
Bolt 5/16-18 (Case to Cover)  
Bolt 1/4-20 (Bearing Cap)  
Bolt 1/4-20 (Differential)  
820 Series  
820 Series  
820 Series  
180-216  
90-100  
84-120  
15-18  
7.5-8.3  
7-10  
20.4 - 24.5  
10.2 - 11.3  
9.5 - 13.6  
Bolt 1/4-20 (Brake Disc)  
820 Series  
1100 Series  
2800 Series  
85-110  
180-216  
180-216  
7.1-9.2  
15-18  
15-18  
9.7 - 12.5  
20.4 - 24.5  
20.4 - 24.5  
Bolt 5/16 x 18  
Bolt 5/16 x 18  
Bolt 1/4-20 (Case to Cover)  
Bolt 1/4-20 (Shift Lever Housing)  
Bolt 1/4-20 (Differential)  
1200 Series  
1200 Series  
1200 Series  
96-120  
84-108  
84-120  
8-10  
7-9  
10.9 - 13.6  
9.5 - 12.2  
9.5 - 13.6  
7-10  
Bolt 1/4-20 (Case to Cover)  
Bolt 1/4-20 (Differential)  
1300 Series  
1300 Series  
90-110  
84-120  
7.5-9.2  
7-10  
10.2 - 12.5  
9.5 - 13.6  
Bolt 1/4-20 (Case to Cover)  
Bolt 1/4-20 (Shift Lever Housing)  
Bolt 1/4-20 (Differential)  
1400 Series  
1400 Series  
1400 Series  
96-120  
84-108  
84-120  
8-10  
7-9  
10.9 - 13.6  
9.5 - 12.2  
9.5 - 13.6  
7-10  
Bolt 1/4-20 (Case to Cover)  
Bolt 1/4-20 (Shift Lever Housing)  
Bolt 5/16-18 (Axle Support Housing)  
Bolt 1/4-20 (Differential)  
2300 Series  
2300 Series  
2300 Series  
2300 Series  
96-120  
96-120  
180-216  
84-120  
8-10  
8-10  
15-18  
7-10  
10.9 - 13.6  
10.9 - 13.6  
20.4 - 24.5  
9.5 - 13.6  
Bolt 3/8-16 (Axle Support Housing)  
2300 Series  
240-312  
20-26  
27.2 - 35.4  
Bolt 1/4-20 (Case to Cover)  
Bolt 1/4-20 (Axle Support Housing)  
Bolt 1/4-20 (Differential)  
2400 Series  
2400 Series  
2400 Series  
96-120  
96-120  
84-120  
8-10  
8-10  
7-10  
10.9 - 13.6  
10.9 - 13.6  
9.5 - 13.6  
Bolt 5-16/18 (Case to Cover)  
Bolt 3/8-16 (Differential)  
2500 Series  
180-216  
420-480  
720-780  
15-18  
35-40  
60-65  
20.4 - 24.5  
47.6 - 54.4  
81.6 - 88.4  
2500 & 2600 Series  
2500 & 2600 Series  
Bolt 1/2-13 (Axle Support Housing)  
Screws No. 10-24 (Cover)  
Bolts 1/4-20 (Retainer Cap)  
R.A.D.  
R.A.D.  
20-24  
1.6-2  
2.2 - 2.7  
90-110  
7.5-9.2  
10.2 - 12.5  
NOTE: On all units containing two jam nuts, secure brake lever, hold the bottom nut and torque the  
top nut to 100 in. - lbs. (11.3 Nm).  
Differential Bolts  
7 ft. - lbs. (9.5 Nm)  
T” Drive Bolt  
T” Drive Cover Screw  
8-11 ft. - lbs. (10.9 - 15.0 Nm)  
20-24 in. - lbs. (2.24 - 3.7 Nm)  
8
RIGHT ANGLE DRIVES  
1100 SERIES  
1
00 SERIES  
A or B  
3
00 SERIES  
1
200 SERIES  
A
A
A or B  
7
00 SERIES  
A or B  
A
6
00 SERIES  
A
A or B  
A
8
8
10 SERIES  
01 SERIES  
2
600 SERIES  
2
800 SERIES  
A
A
910 SERIES  
9
9
9
00 SERIES  
20 SERIES  
30 SERIES  
A
1
300 SERIES  
A
2
400 SERIES  
A
9
15 SERIES  
8
20 SERIES  
A
2
300 SERIES  
2
500 SERIES  
A or B  
A
A or B  
MST  
SPECIFICATION NUMBER  
REQUIRED FOR WARRANTY  
MOD 506  
MODEL NUMBER REQUIRED  
FOR WARRANTY  
PEERLESS  
1
275 1374  
VARIOUS STYLES OF  
IDENTIFICATION  
USED  
Individual Serial Number  
Manufactured on the 275th Day  
Manufactured in 1991  
D.O.M. (DATE OF MANUFACTURE)  
ORIGINAL SERIAL NUMBER  
MODEL NUMBER REQUIRED SPECIFICATION NUMBER  
FOR WARRANTY  
REQUIRED FOR WARRANTY  
SPECIFICATION NUMBER  
REQUIRED FOR WARRANTY  
MODEL NUMBER REQUIRED  
FOR WARRANTY  
D.O.M. (DATE OF MANUFACTURE)  
ORIGINAL SERIAL NUMBER  
D.O.M. (DATE OF MANUFACTURE)  
ORIGINAL SERIAL NUMBER  
Early Models were not identified with a model number on the unit.  
THE MODEL NUMBER WILL BE FOUND ON: A. Metal tag or decal attached to unit as illustrated.  
B. Stamped on unit as illustrated.  
Identification Number Locations  
9
TROUBLE SHOOTING TABLE  
THE FIRST RULE IN TRANSAXLE TROUBLE SHOOTING IS TO ISOLATE THE PROBLEM TO THE TRANSAXLE.  
THE TECHNICIAN MUST CHECK FOR PROPER ADJUSTMENT OF THE BELTS, BRAKE, CLUTCH, SHIFTER  
AND LINKAGES. THE PULLEYS NEED TO BE CHECKED FOR SHEARED RETAINERS AND PROPER BELT  
DISENGAGEMENT. IF THE PROBLEM IS RELATED TO SHIFTING DIFFICULTIES, REMOVE THE DRIVE  
BELT AND RECHECK THE SHIFTING TO ASSURE THE PROBLEM IS NOT WITH THE ASSOCIATED  
EQUIPMENT.  
With the engine off, shift through the gear sequence. Only light resistance should be felt. If the unit  
shifts hard the problem is in the transaxle. Otherwise, check the following areas: the clutch adjustment,  
brake adjustment, belt release and the belt guide positioning.  
All current gear drive units are in-line shift and use shift keys to engage the desired gear to lock and then rotate  
with the shaft. This type of unit requires the transaxle or transmission to be in a no load condition (the clutch  
engaged) when gear selection occurs. Depressing the clutch pedal and therefore engaging the clutch, allows  
the unit to have the input and brake forces removed from the gears and shift keys, which allows the unit to shift  
freely and easily. Improper shifting (shifting while on an incline, shifting while towing any type of load, or shifting  
without clutch engagement) forces the shift keys to engage into a gear that is in a loaded condition. Improper  
shifting leads to premature wear and failure of the shift keys and drive gears and is considered abuse. Tecumseh's  
limited warranty covers only transaxle or transmission failures that are the result of a defect in the material or  
workmanship of the unit, not failures caused by normal wear or abuse by the operator.  
Some Original Equipment Manufacturers (OEM)'s use Tecumseh transaxles and transmissions in lawn tractors  
that do not use a foot operated clutch. These lawn tractors combine the clutch release mechanism with the  
hand operated gear shift lever. When the gear shift lever is moved through the shift gate from the gear engagement  
position toward the neutral position, the attached clutch linkage moves the idler pulley to release all input drive  
belt tension from the transaxle input pulley. With the drive belt tension released (clutch engaged), the transaxle  
is able to shift while on an incline or while towing any type of load. Remember, the Tecumseh Peerless limited  
warranty covers defects in the material or workmanship. It does not cover worn shift keys or gears caused by  
clutch/belt linkages not adjusted correctly.  
Isolate Unit from Transaxle  
Use the following procedure to determine if a hard shifting condition is caused by the shifter/clutch linkage or  
an internal problem in the unit.  
1.  
On level ground, start the engine and with engine running proceed to shift through the gears with the clutch  
pedal depressed (engaged).  
2
.
.
If shifting is difficult, try shifting the transaxle with the engine shut off.  
3
If the transaxle shifts freely through each gear with the engine shut off, the cause of the shifting problem is  
external to the unit. DO NOT REMOVE THE TRANSAXLE.  
4.  
5.  
6.  
If shifting the unit with the engine shut off is difficult then disconnect the linkage from the shifter rod and  
shift through the gears with an open end wrench and compare the shift effort.  
Check the clutch, shifter, and brake linkage for the proper adjustment by using the guidelines provided by  
the owner's manual or the Technician's Handbook for that specific equipment.  
Hard shifting with the engine shut off can be caused by:  
a. bent or binding shift lever or linkage.  
b. shift linkage out of adjustment.  
c. corrosion in the transaxle or transmission.  
d. damaged shift keys, gears or shifter brake shaft.  
e. missing or misadjusted belt guides (see the (OEM's specs).  
NOTE  
DO NOT REMOVE TRANSAXLE UNTIL YOU HAVE CHECKED ITEMS 6A AND 6B.  
If the problem is internal, remove the transaxle from the equipment, disassemble and determine the cause.  
10  
TROUBLESHOOTING TABLE  
PROBLEM  
REMEDY  
UNIT CANNOT BE SHIFTED (OR DIFFICULT TO SHIFT)  
Gears installed incorrectly  
Review positioning of gearing.  
Forks and Rod assembly installed incorrectly  
Remove assembly, recheck and correctly position parts.  
Axle Housing installed incorrectly or not  
tightened correctly/ Axles cannot be turned  
Seal retainers are not properly sealed. Tighten axle housing  
bolts.  
(
in the same direction) while unit is in Neutral  
Shifting lever improperly positioned  
Determine if finger of shifting lever is correct for the unit  
and is correctly installed. Make sure shift lever housing  
has the required gasket.  
Shifting keys broken or damaged  
Shifting washers in backwards  
Replace keys and check unit for additional damage.  
Chamfered side on the inside diameter of the washer  
must face the tips of the keys.  
Shifter/Brake shaft keyways damaged  
Shift lever housing misaligned to case  
Remove nicks and burrs from keyway.  
Check if alignment marks on unit are correctly positioned.  
Also, determine if bend on shaft is in correct position.  
Equipment clutch not engaging  
Shifter stop assembled backwards  
Adjust clutch according to the operator manual of the  
equipment.  
Determine that the notch in the shifter STOP aligns with  
shifter forks in the NEUTRAL position.  
Shift gear chamfer is positioned on the  
wrong side  
Check that bevels on shifter gears are correct (fork flanges  
should be toward each other). On three-gear cluster  
models, the small gear and medium gear chamfers go  
down toward the larger gear. In-line models have the  
chamfer side of the gear facing toward the brake disc.  
Improper fit of case to cover  
Recheck positioning of thrust washers. A misplacement  
or omission of a washer can cause binding. Be sure  
that all tabs are down in the corresponding notches located  
in the case.  
Dowel pins not installed  
Check the exploded view for a correct assembly of parts.  
Check the exploded view for a correct assembly of parts.  
Gears improperly installed  
Input shaft not properly installed  
Input shaft spline must fit into the gear squarely and be  
tapped completely into the case.  
Differential installed improperly  
Re-check the positioning of the bolts in the differential.  
It must be opposite the output shaft gear (except 2400).  
In-line shift models need to have the differential gears  
centered so they will spin freely in the case with the  
cover removed.  
Seal retainers improperly positioned  
Check that seals are correctly installed.  
11  
TROUBLESHOOTING TABLE (Continued)  
PROBLEM  
REMEDY  
UNIT JUMPS OUT OF GEAR  
Gear teeth are worn beyond tolerances  
Spring in shifter fork weak or broken  
Replace worn gears.  
Replace spring.  
Attaching screws for shift lever and housing  
assembly not properly torqued  
Torque screws to 10 ft. lbs. (13.6 Nm).  
Shifter/Brake shaft improperly assembled  
Keys weak or worn, shift gears damaged  
Shift lever bent and hitting unit frame  
Shift rod grooves worn  
Reassemble properly per exploded view  
Replace keys/Shift gears.  
Replace shift lever.  
Replace shift rods.  
Shift rod of improper length or grooving installed  
Check rod length. Replace with correct part.  
Reposition gears.  
Constant mesh gears improperly installed on  
counter shaft  
AXLES CANNOT BE TURNED (IN THE SAME DIRECTION) WITH UNIT IN NEUTRAL  
Axle housing not installed (or not tightened)  
Seal retainers are not properly seated. Tighten axle housing  
bolts.  
Burrs on gearing  
Remove gear and debur with a sharpening stone.  
Broken shifter stop allowing unit to be shifted into Replace snap rings on shift rod out of groove.  
two speeds at the same time  
Thrust washers in wrong position  
Recheck thrust washer and if wrong, reposition.  
Use the proper bearing tool to seat the bearing.  
Bearings not pressed in deep enough  
UNIT DOES NOT DRIVE  
Differential bevel gears broken  
Replace.  
Replace.  
Three gear cluster countershaft key sheared in  
Model 600  
Stripped teeth on gears  
Keys sheared in drive pulleys  
Broken input gear  
Replace.  
Replace.  
Replace.  
Shift keys broken  
Replace keys/check keyways and shift gears.  
Replace chain.  
Reverse chain broken (reverse only unless chain  
becomes wedged)  
UNIT IS NOISY  
Gearing is overly noisy chatter, etc.  
Metallic pieces or other foreign objects in unit  
Worn gears  
Check oil/grease level.  
Remove bits of broken metal, loose washers, etc.  
Remove and replace with new gears.  
Worn bearings, mainly input shaft ball bearing  
Replace the bearing in question/check the belt tension.  
12  
CHAPTER 2. 300 SERIES  
GENERAL INFORMATION  
Basic Troubleshooting  
The 301 series is a single speed transmission  
manufactured in various styles to meet customer  
application needs. The unit uses synthetic lubrication  
and is completely sealed for life and therefore not  
internally serviceable.  
Should a drive problem exist, check the following:  
Cable adjustment  
2. Belt tension and mechanism  
Drive lever operation  
4. Check for worn or glazed belt or damaged pulley  
1
.
3
.
Only the external parts listed below in the illustration  
are available from your normal source of supply.  
5
.
Should the unit still not operate correctly  
replacement will be required.  
Q
R
S
T
Externally Serviceable Parts  
U
SERVICEABLE PARTS  
1
2
3
4
5
. Retaining Ring  
. Drive Pulley  
. Tension Spring  
. Retaining Ring or Push Nut  
. Drive Arm  
ID LOCATION  
13  
CHAPTER 3. 600 SERIES TRANSAXLES  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
WARNING  
INPUT SHAFT  
CASE  
COVER  
LE  
When shifting gears verify the  
RIGHT
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
NG  
CENTER PLATE  
DO NOT shift on a hill or when  
DISC BRAKE  
WARNING  
SHIFT LEVER HOUSING  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
IDENTIFICATION PLATE  
A
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
GENERAL INFORMATION  
BRAKE SHAFT  
CASE  
There are two types of 600 Series transaxles. One is  
the 600 standard series and the other is the 601-001,  
2. After removing axle housings bench or clamp the  
transaxle in a soft jaw vise. Position the transaxle  
so that the socket head cap screws are facing  
up.  
0
02, 003, etc. slow speed series transaxle. This first  
section will deal with the standard 600 series. Please  
refer to the next section for information on 601 slow  
speed transaxle.  
The 600 Series transaxle has an aluminum case and  
cover. The input shaft is on the top of the case to  
receive vertical shaft power from the engine. Some  
PIN  
6
00 series transaxles are equipped with an optional  
disc brake. Due to the many variations of equipment  
braking systems, adjustments and repair to these  
components and linkages are not considered warranty.  
USING  
TRANSAXLE DISASSEMBLY  
NEUTRAL  
POSITION  
3
.
Remove the socket head cap screws holding the  
case and cover together. Drive out the dowel pins  
used for aligning the case and cover.  
1
.
Clean the outside surface of the transaxle in an  
area away from where service will take place.  
Position the shift lever in the neutral position to  
ease disassembly of the transaxle. Remove the  
three screws holding the shift lever. Remove all  
keys from key ways, and remove all burrs and  
dirt from the shafts.  
On hardened shafts, use a stone or crocus cloth  
to remove any burrs and oxidation. All seals should  
be replaced whenever a shaft is pulled through a  
seal. Always use a new gasket whenever the  
gasket surfaces have been separated.  
14  
SHIFTER  
ASSEMBLY  
SEAL PROTECTOR  
COVER  
SHIFTER GEARS  
SHAFT  
REVERSE IDLER  
SHIFTER RODS  
DIFFERENTIAL  
ASSEMBLY  
CENTER  
PLATE  
ASSY.  
THREE GEAR  
CLUSTER  
7
.
Remove the complete shifter assembly by grasping  
the shifting gears, shaft and both shifter rods as  
a complete unit.  
INPUT  
SHAFT  
NOTE  
4
.
Use a seal protector on the axle shaft and lift off  
the transaxle cover assembly. Because this seal  
is the single lip style, it may be reused if care is  
taken to see that it isn't cut or scratched.  
Examine the assembly carefully; if no service is  
required, keep the assembly together as a unit. If service  
is necessary refer to Chapter 21 on shifting assemblies.  
DIFFERENTIAL  
ASSEMBLY  
SCREW  
FASTENERS  
BEVELED EDGE  
INPUT  
SHAFT  
5
.
To remove the differential assembly, it may be  
necessary to replace two or three screws that  
hold the center plate assembly down. Pull  
assembly straight up. If tight, tap on lower axle  
with a soft mallet. CAUTION: DO NOT USE  
STEEL HAMMER. Refer to the chapter on  
differential assembly service. Remove the gear  
on top of the shifter shaft.  
8. Remove the reverse idler shaft, spacer and gear.  
9
.
Remove the cluster gear sub assembly and thrust  
washer.  
CENTER PLATE ASSEMBLY  
BEVELED  
EDGE  
SHIFTER  
ASSY.  
THREE GEAR  
CLUSTER  
6
.
After removing the center plate assembly screws,  
remove center plate and discard the gasket.  
15  
BEVEL  
LONGER KEYWAY  
INPUT SHAFT  
SEAL  
SHORT KEYWAY  
DIFFERENTIAL  
ASSEMBLY  
SNAP RING  
SMALL GEAR  
THRUST WASHER  
BEARING  
BEVEL  
LARGE  
GEAR  
MEDIUM  
GEAR  
1
2. Remove the input shaft oil seal to allow access  
to the snap ring. Remove snap ring and input shaft  
will slide out. A removed seal must be replaced  
by a new seal.  
SLEEVE  
LARGE GEAR  
OLD STYLE  
LONG  
MEDIUM  
SMALL SPACER GEAR  
GEAR  
NOTE  
One model (612) has a sealed ball bearing instead of  
an oil seal. To remove this unit, remove snap ring  
inside the case and drive out. On model 612-A, remove  
the oil seal in the normal manner.  
SLEEVE  
SHORT  
BEVELED EDGE  
SNAP RING RETAINER  
1
0. Cluster Gear Sub-Assembly  
SHIFTER  
STOP  
a. The cluster gear can be disassembled. All worn  
gears are replaceable if damaged or worn. It's  
preferred to use a press to drive the shaft out  
squarely.  
SHIFTER  
RODS  
b. The small and medium gears' bevel faces down.  
There is no beveled edge on the large gear.  
The shorter spacer fits between the medium  
and the large gear.  
SHIFTER FORKS  
BRAKE SHAFT  
(IN NEUTRAL POSITION)  
c. Key edge ends must align with shaft ends.  
SHIFTING ASSEMBLY  
THRUST BEARING  
The shifting assembly is usually removed from and  
installed into the transaxle as a unit. The assembly  
is removed and replaced by grasping the shifting rods  
firmly. This will cause the binding necessary to hold  
the assembly together. Before removal or installation  
of the shifting assembly, the notches in the shifter  
forks should be aligned with those on the shifter stop.  
IDLER GEAR  
THRUST  
WASHERS  
11. Remove the idler gear, thrust washers and thrust  
bearing.  
16  
4
.
Insert the shifter assembly. Check that the shifter  
rods are seated properly.  
SHIFTER  
STOP  
SHIFTER  
RODS  
BRAKE SHAFT  
This alignment indicates the shifting assembly is in a  
neutral position. The shifter stop must be positioned  
so the notch aligns with the notches in the shifter forks.  
For service of the shifting assembly, refer to Chapter  
BEVELED EDGE  
5
.
Install the reverse idler. Make sure the beveled  
edge is up. Place the spacer on top of the gear.  
9
.
Transaxle Assembly  
CENTER PLATE ASSEMBLY  
1
2
. Install new seal, thrust washers, and bearing on  
input shaft. Note sequence, and install into case,  
using a seal protector.  
SHIFTER ASSY.  
THREE GEAR  
CLUSTER  
. Set case assembly open side up. Insert the idler  
gear assembly, thrust washers and bearing. Note  
sequence of washer and bearings from case; thick  
washer, thrust bearing thin washer, idler gear.  
6
.
Install the dowel pins to ease the cover installation.  
Then place a new gasket on the case and install  
the center plate. Position the differential assembly  
with the longer axle in the down position and be  
sure the gear on the shifter shaft is installed.  
GEAR  
THRUS
WASHE
SEAL PROTECTOR  
COVER  
CAUTION Make sure the bearing and thrust  
washers remain in place while assembling the idler  
gear, shifter and brake shaft.  
DIFFERENTIAL ASSEMBLY  
SHIFTER  
SHIFTER GEARS  
ASSEMBLY  
CENTER PLATE  
ASSY.  
SCREW  
FASTENERS  
SHAFT  
REVERSE IDLER  
SHIFTER RODS  
7
8
.
.
Install the cover assembly and torque the cap  
screws to 7-9 ft. lbs. / 84-108 in. lbs. (9.5-12.2  
Nm).  
THREE GEAR  
CLUSTER  
If the unit needs bearings or bushings installed,  
consult Chapter 22 for proper procedures.  
3
. Insert the washer and then the three gear cluster  
assembly. Make sure the bevels on the two shifting  
gears are facing down.  
17  
9
.
Install the axle supports and fill with 24 oz. (710  
ml) of S.A.E. 80W90 part number 730229B gear  
lube. Fill through the shifter housing.  
NEUTRAL  
POSITION  
1
0. Inspection Note: For a neutral position, shift notches  
in forks and notch in stop must be aligned and  
centrally located.  
APPLY LUBRIPLATE  
JAM NUTS  
11. The brake lever type is determined by the original  
equipment manufacturer's selection of this option.  
Apply a light film of lubriplate to the inside lever  
which contacts the brake pins, the outside of the  
lever which contacts the flat washer, and between  
the shaft O.D. and the I.D. of the splined brake  
disc. The brake pads and brake disc must be free  
of grease and oil. To secure the brake lever, hold  
the bottom nut and torque top nut to 100 in. lbs.  
(
10.2-11.3 Nm).  
The brake and linkages may vary.  
Follow recommended guidelines  
in equipment manufacturer's  
WARNING  
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
18  
601 SLOW SPEED TRANSAXLE  
GENERAL INFORMATION  
The 601 slow speed series uses the same case and  
cover as the 600 series so the appearance is the same.  
The following differences are as listed in three steps.  
INPUT SHAFT  
SEAL  
SNAP RING  
IDLER GEAR  
THRUST WASHER  
BEARING  
THRUST WASHER  
2
3
. The input shaft only has one thrust washer instead  
of a thrust bearing and two thrust washers.  
THRUST  
WASHER  
. The 601 also has a different input shaft and bevel  
gear than the 600 transaxle.  
1
. Under the idler gear is one washer instead of a  
thrust bearing and two thrust washers. The 601  
idler gear is different than the standard 600 Series.  
6
00 SERIES BEARING TOOLS  
PART LOCATION  
TOOL REMOVE & REPLACE  
BEARING SIZER  
Brake Shaft  
Axle  
670210  
670204  
*670207A  
670205  
(27 needles)  
0
*
Input Shaft  
Center Plate  
Brake  
Shaft  
670213(3 need  
Differential  
Cluster Gear  
Idler Gear  
Axle Housing  
Reverse Idler  
670204  
670204  
670210  
670204  
*
Bearing must be flush with top of case. Secure with Loctite.  
19  
600 SERIES TRANSAXLES  
LUBRICATION  
Oil Bath  
4 oz. (710 ml) S.A.E. E.P. 90 Oil  
2
Part No. 730229B  
To be filled through shifter  
lever opening.  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
20  
CHAPTER 4. 700 SERIES TRANSMISSION  
IN-LINE SHIFT  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
DISASSEMBLY OF TRANSMISSION  
WARNING  
Clean outside surface of transmission. Position shift  
lever in neutral as indicated by the shift pattern.  
1. If the unit has the OEM option of a neutral start  
switch, remove the switch.  
When shifting gears verify the  
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
2
. Remove setscrew, spring and index ball from the  
transmission cover and six cap screws that fasten  
the cover to the case.  
DO NOT shift on a hill or when  
WARNING  
3. Remove cover. Remove shifter assembly (includes  
shafts, pins and fan from transmission by lifting  
shaft out of case.  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
SPRING  
Use approved safety procedures  
SETSCREW  
COVER  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
INDEX BALL  
GENERAL INFORMATION  
CAP  
SCREWS  
The 700 Series in-line shift transmission is available  
in 2, 3, 4 or 5 speeds forward depending on equipment  
manufacturer’s specifications.  
CASE  
The two speed version is not covered here but can be  
disassembled and reassembled using the same  
information for the 700 described in this section.  
4
. Remove gear and shaft assemblies from the case  
lifting the two shaft assemblies together taking care  
not to separate the drive chain and sprocket  
relationship. Take note that the "fat" side of the  
sprockets must face the tips of the keys.  
NEUTRAL START  
PROVISION  
I.D. TAG  
SHIFTER ASSEMBLY  
SHIFTER FAN  
SHIFTER ROD  
DISC BRAKE  
OUTPUT  
SPROCKET  
SHIFT PATTERN  
OF ROTO-SHIFT  
SHIFTER ROD  
Optional features include right or left hand output and  
a disk brake, for either in-line or “H” pattern unit.  
NOTE  
Due to the many variations of equipment braking  
systems, adjustments and repair to these components  
and linkages are not considered warranty.  
SHIFTER PINS  
NEUTRAL  
START  
SWITCH  
OUTPUT  
SPROCKET  
DISC BRAKE  
21  
5
. Remove the one-piece bevel spur combination gear  
and the remaining splined spur gears from the  
countershaft.  
INSPECTION AND REPAIR  
Remove grease with rags and cleaning solvent and  
replace worn or damaged parts.  
6
. Remove from the shifter/brakeshaft the output  
sprocket, brake disc, all bushings, shifter spur  
gears, sprocket, collar, keys and chamfered  
washers.Note the inside chamfer on the shift  
washers face the tips of the keys to compress  
them and provide ease in shifting.  
ASSEMBLY OF THE 700 SERIES IN-LINE  
TRANSMISSION  
1
. Install and secure the input shaft and bevel gear in  
the case. Review paragraphs 7 & 8 and reverse  
the order.  
Use approved safety procedures  
CAUTION  
with equipment when handling  
shifter/brakeshaft parts. These parts have  
extremely sharp edges. Inadequate safety  
precautions could result in equipment damage  
and serious injury.  
NOTE  
All Needle bearings are lubricated with E.P. Grease.  
DO NOT USE BENTONITE GREASE on needle  
bearings. For maximum gear train life use Bentonite  
grease only on shafts and gears, Tecumseh part  
number 788067C.  
COUNTERSHAFT  
"FAT SIDE" MUST  
FACE THE KEY TIPS  
SPUR GEARS  
BUSHING  
BEVEL  
SPUR  
GEAR  
CHAMFERED SHIFT WASHERS. Many older models  
have a thrust washer with a 45 chamfer on the inside  
o
REMOVE  
BEARING AND  
SPROCKET  
diameter. The latest style washer has a curved or  
rounded side. The purpose of the washers is to  
compress the shift keys as they slide into a gear.  
Therefore, the chamfered or rounded side of these  
washers must face the shoulder of the shaft or towards  
the tips of the shift keys. The washers are  
interchangeable.  
SHIFT GEARS. One side of the gear is flat and the  
other side is chamfered or recessed. The flat side of  
the gear is placed onto the shaft towards the shoulder  
of the shaft or towards the shift keys.  
THRUST WASHER  
THICKEST THRUST  
WASHER  
SHOULDER  
COLLAR  
CHAIN  
7. Remove the snap ring from the input shaft; remove  
bevel gear and pull shaft through case.  
COLLAR  
SHOULDER  
KEY  
8
. Input shaft needle bearings should be installed flush  
to .005" (.127 mm) below bearing bore surfaces  
from inside and outside the case.  
BEVEL GEAR  
SNAP RING  
KEY  
OUTPUT AND  
BRAKE SHAFT  
THRUST WASHER  
NEEDLE  
BEARINGS  
"O" RING  
THRUST  
WASHER  
SNAP RING  
INPUT  
SHAFT  
22  
SHOULDER  
BEVEL SPUR GEAR  
COUNTERSHAFT  
EARLY  
STYLE  
NEW  
STYLE  
THRUST  
WASHER  
(
SEPARATES  
GEAR FROM  
BEARING)  
CUT OUT  
SIDE OF  
GEAR MUST  
SPUR GEARS  
FLAT SIDE OF  
GEAR MUST  
FACE  
FACE  
SHOULDER  
ON SHAFT  
OUTBOARD  
END OF  
SHAFT  
5
6
. Install the chain over the two shafts making sure  
that the collars of both sprockets face inward toward  
the tips of the keys.  
2
. Starting from the output sprocket end on the shifter/  
brake shaft, install a chamfered washer with the  
chamfer facing the shoulder on the shaft. With the  
output sprocket end down, place the shaft vertically  
in a vice with protective jaws and slide the collar  
and keys downward toward the shoulder and through  
the chamfered washer. Remember the "fat" side of  
the shift collar MUST face the key tips. Use work  
gloves as the keyways on the shifter/brake shaft  
are extremely sharp.  
. Install the appropriate protection washers on  
sprocket ends and bronze oil light bushings  
HUB MUST  
FACE BEVEL  
COUNTERSHAFT  
SPUR GEARS  
BEVEL  
SPUR GEAR  
SPUR  
GEAR  
BUSHING  
REMOVE  
BEARING  
AND  
SPROCKET  
ANGLE  
SHAFT  
TOGETHER  
HERE  
SHIFT SPUR GEARS  
CHAIN SPROCKET  
BRAKE  
COLLAR  
KEY  
WASHER  
THRUST  
WASHER  
THICKEST  
THRUST  
WASHER  
SHOULDER  
COLLAR  
CHAIN  
7
. Install shifter assembly (shaft, pins and fan) 12  
oz. (355 ml) of Bentonite grease around the gearing,  
and reinstall the cover to the case. Torque cap  
screws 90-110 in. lbs. (10.2 - 12.5 Nm).  
BUSHING  
OUTPUT  
SPROCKET  
BUSHING  
OUTPUT AND  
BRAKE SHAFT  
3
. Install the largest gear (first gear) with the chamfered  
end facing away from the key tips so that the flat  
side of the gear contacts the flat side of the chamfered  
washer. Remember the order as chamfer to chamfer  
and flat to flat when assembling the gears on the  
shifter brake/shaft. Install another chamfered washer  
noting that the chamfered side makes contact with  
the chamfered side of first gear. Install second  
gear and all remaining gears and washers the same  
way. The number of gears and/or spacers will be  
determined by the number of speeds requested by  
the OEM.  
SHIFTER ASSEMBLY  
SHIFTER FAN  
SHIFTER ROD  
SHIFTER PINS  
4
. Install the splined bevel spur gear first (with the  
bevel facing away from the shifter rod) and remaining  
splined spur gears starting with the smallest to  
the largest on the counter shaft as shown.  
23  
8
. For in-line transmissions, install the detent ball,  
spring and setscrew, in that order, into the cover.  
Slowly tighten the screw to flush, then one full  
turn below flush. The deeper you turn in the set  
screw the more tension will be on the shifter fan  
which will make the gear positions feel more  
deliberate to the operator.  
APPLY LUBRIPLATE  
BRAKE  
BRACKET  
9
1
. Check for binding by turning the input shaft. Install  
transmission on equipment. Install brake and linkage,  
and adjust to disengage when clutch is engaged.  
Consult equipment Owner’s Manual.  
0. Apply a light film of lubriplate to the inside lever  
which contacts the brake pins, the outside of the  
lever which contacts the flatwasher, and between  
the shaft O.D. and the I.D. of the splined brake  
disc. The brake pads and brake disc must be free  
of grease and oil. Install the brake assembly.  
The brake and linkages may vary.  
Follow recommended guidelines  
in equipment manufacturer's  
WARNING  
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
24  
700 SERIES TRANSMISSION  
LUBRICATION  
Permanent Lubrication  
2 oz. (355 ml) Bentonite grease  
1
Part No. 788067C  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
25  
700H SERIES TRANMISSIONS  
It is recommended that you take  
special notice of all items  
SETSCREW  
WARNING  
NEUTRAL START  
SWITCH  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
When shifting gears verify the  
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
DISC BRAKE  
If installed, remove the neutral start switch. This can  
be an option to the OEM.  
DO NOT shift on a hill or when  
WARNING  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
NOTE  
Due to the many variations of equipment braking  
systems, adjustments and repair to these components  
and linkages are not considered warranty.  
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
DISASSEMBLY OF THE TRANSMISSION  
1
. Clean the outside of the transmission and position  
the shift lever in the neutral position as indicated  
by the shift pattern.  
2
3
4
. Remove the shift lever by removing the four hex  
screws on the shift lever cover.  
CAP SCREWS (6)  
. With a 3/32 inch Allen wrench, remove the set  
screw, spring and detent ball.  
. Remove the six cap screws that fasten the cover  
to the case; then remove the cover.  
SHIFT PATTERN  
DISC BRAKE  
HUB MUST FACE  
BEVEL SPUR GEAR  
COUNTERSHAFT  
SPUR GEARS  
BEVEL SPUR GEAR  
BUSHING  
SHIFTER ROD  
REMOVE  
BEARING  
AND  
The "H' pattern transmission described here is a 4-  
speed forward, 1 reverse unit.  
ANGLE  
SHAFT  
TOGETHER  
HERE  
SPROCKET  
TORQUE SCREWS  
70-90 IN. LBS  
TABS IN  
SLOTS  
(7.93-10.2 Nm)  
THICKEST THRUST  
WASHER  
THRUST  
WASHER  
SHOULDER  
COLLAR  
CHAIN  
SHIFTER  
PLATES (2)  
5
. Remove the gear shaft assemblies from the case  
half of the transmission by lifting the two shafts  
out of the bearing supports taking care not to disturb  
the drive chain relationship of the sprockets.  
PLATE  
6. Angle the chain and sprocket ends of shaft toward  
each other, removing the bearing and sprocket from  
the countershaft. Note the collar on the sprocket  
faces the bevel spur gear. Remove the chain.  
The 700 "H" pattern transmission gear arrangement is  
similar to the in-line transmission except for the shift  
gate and an additional collar and spacer on the shifter/  
brake shaft. The countershaft also has an additional  
spacer.  
BEVEL SPUR GEAR  
SPACER  
Disassembly of the 700 series “H” shift pattern  
includes a spacer.  
26  
OUTPUT  
SPROCKET  
SHOULDER  
0
45 CHAMFER  
BRAKE  
DISC  
CHAIN SPROCKET  
KEY  
COLLAR  
THRUST WASHER  
SEPARATES GEAR  
FROM BEARING)  
BUSHING  
(
OUTPUT AND  
BRAKE SHAFT  
BUSHING  
SNAP  
RING  
CUT OUT  
SIDE OF GEAR  
MUST FACE  
OUTBOARD  
END OF  
FLAT SIDE  
OF GEAR  
MUST FACE  
SHOULDER  
ON SHAFT  
Disassembly of the 700 series "H" shift pattern includes  
a second collar and a spacer.  
SNAP RING  
BEVEL GEAR  
SHAFT  
THRUST WASHER  
NOTE  
The thrust washer on the brake disc end of the shifter/  
brake shaft does not have a chamfer on the inside  
diameter and must be positioned as shown above. It  
is thicker than the other thrust washers separating  
the gear works from the bearings.  
INSTALL BEARINGS  
FLUSH TO .005"  
(.127mm) BELOW  
CASE SURFACE  
"
O" RING  
NEEDLE  
BEARINGS  
CHAIN SPROCKET  
BRAKE  
DISC  
SNAP RING  
OUTPUT  
SPROCKET  
COLLAR  
THRUST WASHER  
KEY  
INPUT SHAFT  
Input shaft removal is the same for both the 700 series  
in-line and “H” shift pattern transmissions.  
7
. Remove the snap ring and bevel gear from the  
input shaft and pull the shaft through the case.  
OUTPUT AND  
BRAKE SHAFT  
8
. The input shaft needle bearings should be installed  
flush or no more than .005" (.127 mm) below the  
bearing bore surface from inside and outside the  
case.  
BUSHING  
BUSHING  
1
. The first, second and third gears have to be forced  
over the keys when assembling. Remember to place  
the spacer in the 4th gear position.  
INSPECTION AND REPAIR  
Examine all parts after removing grease with rags and  
cleaning solvent to determine which parts need  
replacement.  
BEVEL SPUR GEAR  
ASSEMBLY OF 700H SERIES TRANSMISSION  
KEY  
OUTPUT AND  
BRAKE SHAFT  
KEY  
SPACER  
2
. Assemble the countershaft and gears as shown  
above remembering the spacer is in the 4th gear  
position.  
Assembly is the same as the 700 series in-line  
transmission except for an additional collar and spacer.  
27  
COLLAR MUST FACE BEVEL  
SPUR GEAR  
COUNTERSHAFT  
TORQUE SCREWS  
70-90 IN. LBS  
THRUST  
WASHER  
BEVEL SPUR GEAR  
SPACER  
TABS IN  
SLOTS  
REMOVE BEARING  
AND SPROCKET  
(7.93-10.2 Nm)  
BUSHING  
THRUST  
WASHER  
SHIFTER  
PLATES (2)  
ANGLE  
SHAFT  
TOGETHER  
HERE  
BUSHING  
TABS  
BUSHING TABS  
PLATE  
THRUST  
WASHER  
THRUST WASHER  
SHOULDER  
SPACER  
CHAIN  
6
7
. For in-line transmissions, install the detent ball,  
spring, and setscrew, in that order, into the cover  
and slowly tighten the screw up to two turns below  
flush. Depending on personal preference. The  
deeper you turn in the set screw the more tension  
will be on the shifter fan which will make the gear  
positions feel more deliberate to the operator.  
3
. With the collar on the countershaft sprocket facing  
the bevel spur gear, install sprocket onto the serration  
and install chain. Install all four (4) thrust washers.  
SPACER  
. Check for binding by turning the input shaft. Install  
the transmission on the equipment. Install the brake  
and linkage and adjust the clutch according to the  
equipment Owner’s Manual.  
NOTCHES  
NOTCHES  
APPLY LUBRIPLATE  
SPACER  
BRAKE  
BRACKET  
4
. Install the bronze bushings, disc and sprocket.  
Install the shaft assemblies into the case pressing  
the bushing tabs into the notches in the case.  
Be sure bushings tabs are seated  
in transmission case, or the cover  
won't sit squarely on the case.  
CAUTION  
SPACER  
8
. Apply a light film of lubriplate to the inside lever  
which contacts the brake pins, the outside of the  
lever which contacts the flatwasher, and between  
the shaft O.D. and the I.D. of the splined brake  
disc. The brake pads and brake disc must be free  
of grease and oil.  
NOTCHES  
NOTCHES  
The brake and linkages may vary.  
Follow recommended guidelines  
WARNING  
in equipment manufacturer's  
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
SPACER  
5
. Install the shifter assembly, 12 oz. (355 ml) of  
Bentonite grease around the gearing, installing the  
cover on the case. Torque the cover fasteners 90-  
110 in. lbs. (10.2-12.5 Nm).  
28  
700H SERIES TRANSMISSION  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
29  
CHAPTER 5. 800/801 SERIES TRANSAXLES  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
WARNING  
INPUT SHAFT  
SET  
SCREW BALL  
INDEX  
FAN SHAFT  
ROD  
When shifting gears verify the  
SPRING  
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
DO NOT shift on a hill or when  
WARNING  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
IDENTIFICATION TAG  
Use approved safety procedures  
IDENTIFICATION  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
The unit model number will be found on a metal tag at  
either of the two locations.  
DISASSEMBLY  
1. Clean outside surface of the transaxle.  
2
. Position shift lever in the neutral position as  
indicated by the shift pattern.  
GENERAL INFORMATION  
NOTE  
3. If installed, (O.E.M. option) remove neutral start  
switch.  
Due to the many variations of equipment braking  
systems, adjustments and repair to these components  
and linkages are not considered warranty. The brake  
may be either a left-hand or right-hand per the O.E.M.  
option.  
4. Remove the allenhead setscrew, the detent ball  
and spring .  
NEUTRAL  
START SWITCH  
(OPTIONAL)  
DISC BRAKE  
(LEFT OR  
RIGHT HAND  
OPTIONAL)  
SHIFT ROD  
ALLENHEAD  
SCREW  
NEUTRAL  
START  
SWITCH  
BRAKE  
BRACKET  
SCREWS  
(OPTIONAL)  
SETSCREW  
COVER CASE HEX  
SCREWS (17)  
INPUT  
O.E.M. OPTION)  
(
NOTE  
The 800/801 series transaxle is basically a combination  
of the 700 series transmission with a 600 series  
transaxle differential. The position of the input shaft  
varies with a particular model. Because of the option  
of the input shaft and gear positioning on either side  
of the bevel gear, the axle output will vary, which allows  
the O.E.M. the ability to rotate and reverse mount  
the transaxle. The model described in this section is  
a five speed forward, single reverse. The input shaft  
for this model is located to the left of the bevel gear.  
Prior to removing the cover and the two gear shaft  
assemblies from the case, remove the square cut  
O" ring from the top of the shifter rod.  
"
5
. Remove the case fasteners and push the shift  
rod through the cover. The shifting assembly may  
temporarily remain in the case.  
6
. Remove the two brake bracket screws, and remove  
the brake assembly.  
30  
NOTE  
8. Remove the needle bearing (closed end) flat washers  
2), output gear and output pinion, and 3 square cut  
(
Before disassembly, observe how the “V” notches on  
the flanged bushings fit into the corresponding recess  
in the case.  
seals from the countershaft. (2 seals in the output  
pinion 1 in the needle bearing cap). The "O" rings  
on the countershaft are larger than those on brake  
the shaft ends. Always replace with new seals  
whenever service is performed.  
SHIFTER/BRAKE SHAFT  
CASE HALF  
SQUARE CUT  
"O" RING  
FLANGED  
BUSHING  
SHIFTER FAN  
FLANGED  
BUSHING  
OIL SEAL  
OIL SEAL  
SHIFTER/BRAKE  
SHAFT  
SPUR  
GEAR  
SPROCKET  
COLLAR  
THRUST  
WASHER  
BEARING  
SHIFT  
WASHER  
FLANGED  
BEARING  
BUSHING  
RETAINER  
COUNTER-  
FLANGED  
BUSHING  
DIFFERENTIAL  
ASSEMBLY  
SHAFT  
SPACER  
NOTE  
COUNTERSHAFT  
The square cut black rubber “O” rings on the shifter  
brake shaft which retain the Bentonite grease in the  
case.  
SQUARE CUT  
"O" RING  
SPROCKET  
COLLAR  
7
. Remove gear and shaft assemblies from case half  
by lifting the two shafts out of the bearing supports  
taking care not to disturb drive chain relationship  
with the hubs on the sprockets.  
9
. Angle the shifter/break shaft and countershaft chain  
sprocket ends toward each other. Note the collar  
on the sprockets face the bevel gear. Next remove  
the chain.  
NOTE  
Remove the Bentonite grease from all parts and case  
halves as they are removed.  
SPUR GEARS  
SPLINE FOR CHAIN  
SPROCKET GEAR  
FLANGED  
BUSHING  
SHIFTER GEARS  
SHIFTER/BRAKE  
SHAFT  
THRUST WASHER  
SPUR GEAR  
FLANGED  
BUSHING  
COUNTERSHAFT  
SPROCKET  
NEEDLE  
BEARING  
THRUST WASHER  
BEVEL GEAR  
FLANGED BUSHING  
(
CLOSED  
SPACER  
THRUST  
WASHER  
END) OR  
BALL  
BEARING  
KEY  
COLLAR  
1
0. Remove the sprocket, bevel gear, spur gears, thrust  
washer, and flanged bushing. The spur gears are  
splined to the countershaft.  
OUTPUT  
GEAR  
OUTPUT FLAT WASHER (SQUARE  
PINION CUT SEAL IN EACH END  
FLAT WASHER OF OUTPUT PINION)  
FLANGED  
BUSHING  
SPUR  
GEARS  
31  
FLANGED BUSHING  
SPROCKET  
SPLINE FOR  
DISC BRAKE  
OLD STYLE  
"A"  
SQUARE CUT  
O" RING  
"
FLANGED  
BUSHING  
SHIFTER/BRAKE  
SHAFT  
SQUARE  
CUT "O"  
RING  
"C"  
NEW STYLE  
"D"  
"
B"  
SQUARE  
CUT "O" "V" NOTCH  
RING  
KEY  
THRUST  
WASHER  
(NO  
HEAVY DUTY  
SEALED BALL  
BEARING  
SHIFT  
COLLAR  
"V" NOTCH  
THRUST  
WASHER  
SEAL  
CHAMFER)  
SHIFT  
WASHER  
SHIFTER GEARS  
The 800 Series has used four styles of bearings on  
the axles. The earliest style "A" was a smaller caged  
needle bearimg. Style “B” must have the seal to the  
outside of the bearing. When bearing style “C” is used,  
a square cut “O” ring must be used on each side of  
the bearing. Bearing style “D” is a sealed ball bearing  
used in heavy duty applications. Styles “B”, “C” and  
1
1. From the shifter/brake shaft remove the square  
cut seals (2), flanged bushings (2), thrust washers  
2) on the shaft ends, spur gear, spacer, sprocket,  
(
shift collar with keys, thrust washers and the shifter  
gears.  
D” are interchangeable. All needle bearings must be  
FLANGED  
BUSHING  
repacked with grease. Never use Bentonite grease in  
ball or needle bearings; use wheel bearing grease.  
SEAL  
BEARING  
BEARING  
INPUT  
NEEDLE BEARING  
SHAFT  
FLUSH WITH  
HOUSING  
RETAINING RING  
WASHER  
SEAL  
THRUST  
WASHER  
SQUARE CUT  
"O" RING  
NEEDLE  
BEARINGS  
FLANGED  
BUSHING  
DIFFERENTIAL  
.
.
135" (3.43 mm)  
150” (3.82 mm)  
BEVEL GEAR  
12. Remove the differential from the case. Remove  
the (2) seals, needle bearings or ball bearings (2).  
THRUST  
WASHER  
RETAINING RING  
1
3. To disassemble the input shaft remove the retaining  
ring on the bevel gear side from the input shaft;  
then remove the bevel gear and pull the shaft  
through the case. The square cut “O” ring must  
be replaced if removed. Tool Part No. 670251 is  
used for removal and installation of needle bearings  
for the input shaft. The needle bearing on the inboard  
side is installed .135" - .150” (3.43 - 3.82 mm)  
below flush.  
32  
ASSEMBLY  
1
THRUST WASHERS. Arunning change has been made  
to the shift washers. Many models have used the  
. Apply E. P. grease between bearings and install  
and secure the input shaft and bevel gear in the  
cover. For maximum gear train life use only  
Bentonite grease on all shafts and gears, Tecumseh  
part number 788067C.  
o
thrust washer with a 45 chamfer on the inside diameter.  
The latest style washer has a curved or rounded side.  
The purpose of both washers is to compress the shift  
keys as they slide into the gears. Therefore, the  
chamfered or rounded side of these washers must  
face the shoulder of the shaft or towards the shift  
keys. The washers are interchangeable.  
COLLAR  
DISC BRAKE  
SPLINE  
SHOULDER  
KEY  
SHIFTING GEARS. The two sides of the shift gears  
are different. One side is flat and the other side is  
recessed to accept shift washers. The flat side of  
the gear is placed onto the shaft towards the shoulder  
of the shaft or towards the shift keys.  
KEY  
SHIFTER/BRAKE SHAFT  
2
. Grease the keyways and slide the shift keys and  
collar onto the shifter/brakeshaft. The thick side  
of the shift collar MUST face the shoulder (brake  
end) on the shaft. Service replacement shifter/brake  
shafts will come with four keyways on the shaft  
instead of two.  
NOTE  
When repairing the unit use, the same number of keys  
that were used originally.  
SHOULDER RECESS  
EARLY  
STYLE  
NEW  
STYLE  
THRUST  
WASHER  
(
SEPARATES  
SHIFT WASHER  
GEAR FROM  
BEARING)  
CUT OUT  
SIDE OF  
GEAR MUST  
FLAT SIDE OF  
GEAR MUST  
FACE  
FACE  
SHOULDER  
ON SHAFT  
OUTBOARD  
END OF  
SHAFT  
3
. Install the thrust washers and shifting gears onto  
the shifter/brake shaft. The number of gears and/  
or spacers will be determined by the number of  
speeds in the transmission ordered by the O.E.M.  
33  
FLANGED BUSHING  
SPROCKET  
SPLINE FOR  
DISC BRAKE  
FLANGED SQUARE CUT  
BUSHING  
FLANGED  
BUSHING  
SHIFTER/BRAKE  
SHAFT  
"O" RING  
FLANGED  
BUSHING  
SHIFTER/BRAKE  
SHAFT  
SQUARE  
CUT "O"  
RING  
SPUR  
GEAR  
SPROCKET  
COLLAR  
THRUST  
WASHER  
SQUARE  
CUT "O" "V" NOTCH  
RING  
KEY  
THRUST  
WASHER (NO  
CHAMFER)  
SHIFT  
WASHER  
SHIFT  
COLLAR  
"V" NOTCH  
THRUST  
WASHER  
SHIFT WASHER SHIFTER GEARS  
SPACER  
NOTE  
The large thrust washer on the shift gear end of the  
shifter/brake shaft does not have a chamfer on the  
inside diameter.  
COUNTERSHAFT  
SQUARE CUT  
"O" RING  
SPROCKET  
COLLAR  
4
. Reassemble the shifter/brake shaft by installing  
the sprocket and chain, spacer, spur gears, and  
thrust washers. Be sure the collar on the sprocket  
faces inward toward the shift collar or toward the  
brake end of the shaft. Install the appropriate thrust  
washers and the bronze oil light bushings on both  
ends of the shifter/brake shaft; then install the square  
cut “O” ring on the brake end of the shaft. Opposite  
the brake end, there is a steel spacer disk; there  
is not an "O" ring on that end.  
6. With the ends of the countershaft and shifter/brake  
shaft angled together, install the countershaft  
sprocket and chain on the countershaft.  
THICKER  
SQUARE  
CUT "O"  
FLAT  
WASHER  
RING  
LARGE WASHER  
SPUR GEARS  
SPLINE FOR CHAIN  
SPROCKET GEAR  
OUTPUT GEAR  
OUTPUT  
PINION  
COAT AREA  
WITH GREASE  
.
135" -.150"  
(3.43-3.81 mm)  
BOTH ENDS  
COUNTERSHAFT  
SPROCKET  
THRUST WASHER  
BEVEL GEAR  
FLANGED BUSHING  
NOTE  
7
. For correct positioning of the needle bearings use  
the removal/installation tool, Tecumseh part #  
Depending on the model specification, the bevel gear  
may be installed one of two ways. For description  
purposes, in this section, the model used has the  
bevel on the gear facing inward.  
6
70252. Fill the area between the needle bearings  
with axle grease before installing on the  
countershaft.  
5
. On the countershaft, install the bevel gear and  
the spur gears starting with the smallest to largest,  
(
opposite the shifter/brake shaft spur gear  
arrangement). Place a thrust washer and bronze  
oil light bushing on the spur gear end of the  
countershaft. Note that the “V” notch on the bushing  
fits into the recess “V” in the case.  
34  
"V" NOTCH  
SQUARE CUT  
SET  
SCREW  
FAN  
SHAFT  
ROD  
FLANGED  
BUSHING  
INPUT SHAFT  
INDEX  
BALL  
SHIFTER GEARS  
SHIFTER/BRAKE  
SHAFT  
THRUST  
WASHER  
SPUR GEAR  
FLANGED  
BUSHING  
SPRING  
"O" RING  
NEEDLE  
BEARING  
(
CLOSED  
SPACER  
KEY  
COLLAR  
THRUST  
WASHER  
END) OR  
BALL  
BEARING  
OUTPUT  
GEAR  
IDENTIFICATION TAG  
FLAT WASHER  
OUTPUT (SQUARE CUT SEAL  
PINION IN EACH END OF  
FLANGED  
BUSHING  
NOTE  
On reassembly, use either gasket eliminator Loctite  
SPUR  
GEARS  
FLAT WASHER OUTPUT PINION)  
5
(
15 (part number 510334) or silicone RTV Loctite 598  
part number 788093).  
8
. Install the flat washer to protect the turning sprocket  
from the square cut seal which fits into the recessed  
end of the output pinion gear. Install a square cut  
seal on the other end of the output pinion and the  
output gear. The large protective thrust washer keeps  
these in position. There is another square cut rubber  
seal that fits into the recessed end of the needle  
bearing sleeve assembly (closed end). Place it on  
the end of the countershaft and the two shafts are  
complete and ready to install into the case.  
11. Install the shifter fan detent ball, spring and setscrew  
in that order, into the cover, and slowly tighten the  
screw one turn below flush. If unit contained a  
neutral start switch, reinstall it. Check for binding  
by turning the input shaft.  
APPLY LUBRIPLATE  
SHIFTER/BRAKE SHAFT  
CASE HALF  
BRAKE  
BRACKET  
OIL SEAL  
SHIFTER FAN  
OIL SEAL  
BEARING  
BEARING  
COUNTER- RETAINER  
FLANGED  
BUSHING DIFFERENTIAL FLANGED  
BUSHING  
12. Apply a light film of lubriplate to the inside lever  
which contacts the brake pins, the outside of the  
lever which contacts the flat washer, and between  
the shaft O.D. and the I.D. of the splined brake  
disc. The brake pads and brake disc must be free  
of grease and oil. Install brake assembly.  
SHAFT  
ASSEMBLY  
9
. DIFFERENTIAL ASSEMBLY  
Install the flanged bushings (2), flat washers, needle  
bearings or ball bearings (2), and oil seals (2), with  
seal grooves facing out.  
Install the transmission on the equipment. Adjust  
the brake linkage to disengage when the clutch is  
engaged. The brake and linkages may vary. Consult  
the equipment owner's manual.  
For teardown and reassembly of the differential,  
see Chapter 18 on differentials.  
Install the differential in the case.  
Follow recommended guidelines  
WARNING  
in equipment manufacturer's  
1
0. Install the shifter assembly, and pack 30 oz.(887ml)  
(
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
36 oz. [1065 ml] 801 Series) of Bentonite grease  
around the bearings and gearing, then reinstall  
cover on the case. Torque cap screws 90-100 inch  
pounds (10.2-11.3 Nm).  
35  
800/801 SERIES TRANSAXLES  
LUBRICATION  
Permanent Lub
3
3
0 oz. (887 ml)
6 oz. (1065 ml
Bentonite grea
Part No. 78806
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
36  
8
20 SERIES TRANSMISSIONS  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
3. Remove cover. Remove shifter assembly (includes  
shift rod and shifter fan) from transmission by lifting  
shaft out of case.  
WARNING  
4
. Remove bearing cap, differential, shift fan, output  
shaft assembly and then both the shifter/brake shaft  
and countershaft simultaneously. Take note that  
the "fat" side of the sprockets must face the tips  
of the keys or the brake side.  
When shifting gears verify the  
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
5
. OUTPUT PINION AND SHAFT.  
DO NOT shift on a hill or when  
WARNING  
Remove sleeved needle bearings. Remove the large  
thrust washers and large output gear. The output  
pinion gear is machined directly onto the output  
shaft in most models. There are models in which  
the output shaft is splined to accept a splined output  
pinion gear and a splined output gear.  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
SHIFT FAN  
BEARING CAP  
OUTPUT  
SHAFT  
ASSEMBLY  
SHIFTER/BRAKE  
SHAFT ASSEMBLY  
GENERAL  
COUNTERSHAFT  
ASSEMBLY  
The 820 series is similar to the 920 series transaxle  
in basic operation. It has up to 6 speeds forward and  
one reverse. The 820 series is a heavy duty unit which  
is suited for ground engaging attachments. The 820  
features ball bearings, needle bearings and steel cut  
gears throughout.  
NOTE  
SLEEVED NEEDLE BEARINGS  
DIFFERENTIAL  
Due to the many variations of equipment braking  
systems, adjustments and repair to these components  
and linkages are not considered warranty.  
NEEDLE  
BEARING  
BEARING  
SLEEVE  
OUTPUT GEAR  
"O" RING  
OPTIONAL INPUT  
SHIFT ROD  
LOCATION  
INPUT SHAFT  
INDEX BALL,  
SPRING AND  
SET SCREW  
"
O" RING  
COVER/CASE  
HEX SCREWS  
OUTPUT  
PINION  
NEEDLE  
BEARING  
THRUST  
WASHER  
BEARING  
SLEEVE  
THRUST  
WASHER  
(17)  
IDENTIFICATION TAG  
BRAKE BRACKET  
SCREWS (BRAKE  
CAN BE ON RIGHT  
OR ON LEFT SIDE)  
NEUTRAL START SWITCH  
LOCATION (OPTIONAL)  
DISASSEMBLY OF TRANSMISSION  
Clean outside surface of transmission. Position shift  
lever in neutral as indicated by the shift pattern.  
1
. The unit may have the OEM option of a neutral  
start switch, remove the switch.  
2
. Remove setscrew, spring and index ball from the  
transmission cover and six cap screws that fasten  
the cover to the case.  
37  
6
. COUNTERSHAFT AND SHIFTER/BRAKE SHAFT  
As these assemblies are taken apart, lay the parts  
out in a systematic order. This will help to make  
reassembly easier and inspection of all parts  
possible. Clean each part of grease as the parts  
are laid out.  
REASSEMBLY  
NOTE  
Do not apply bentonite grease to needle bearings; use  
only EP grease. For maximum gear train life use only  
Bentonite grease on all shafts and gears, Tecumseh  
part number 788067C.  
SHIFTER/BRAKE  
SHAFT ASSEMBLY  
1
. Install the input shaft, and all the associated parts  
in the order shown on the input shaft breakdown.  
2
. Grease all four keyways, insert keys into collar  
and keyways and slide onto the shifter/brake shaft.  
SHIFTER/BRAKE SHAFT  
COUNTERSHAFT  
ASSEMBLY  
SHIFT KEYS (4)  
SHIFT COLLAR  
7
. INPUT SHAFT  
3
. It is easier to assemble this transaxle if the  
countershaft and the shifter/brake shaft are  
assembled at the same time. Start by placing the  
reverse chain over the reverse sprockets. Make  
sure the collars on the sprockets are on the same  
side of the chain, facing the brake side and toward  
the tips of the keys.  
The input shaft can also be removed and inspected  
or serviced. Remove the snap ring on the bevel  
gear and pull the shaft through the cover. The seal  
must be replaced if the shaft is removed.  
SNAP RING  
Place the neutral spacers onto the shifter/brake  
shaft with the larger inner diameter sides facing  
together. Position the spacer with the largest inner  
diameter radius toward the shift keys and brake  
end of the shifter/brake shaft. Push the shifting  
keys through the reverse sprocket and the first  
neutral spacer, pull the neutral spacers and the  
reverse sprocket up against the shoulder of the  
shifter/brake shaft.  
BALL  
BEARING  
INPUT SHAFT  
NEEDLE BEARING  
LARGE  
INNER  
LARGER RADIUS  
SPACE TOWARD  
DIAMETERS  
SEAL  
SHIFT KEYS  
FACE EACH  
OTHER  
THRUST WASHER (Large)  
"
O" RING  
NEUTRAL  
SPACERS  
THRUST WASHER (Small)  
THRUST BEARING  
THRUST WASHER  
GREASE  
THESE  
AREAS  
CUPPED THRUST  
WASHER  
REVERSE  
CHAIN  
INPUT PINION  
SNAP RING  
SPROCKET  
COLLARS  
8
. DIFFERENTIAL  
Refer to Chapter 18 on differentials for service.  
Should disassembly of the differential be necessary,  
oz. (.59 ml) of bentonite grease should be placed  
around the gears on reassembly.  
2
38  
4
. Insert the countershaft into the smaller reverse  
sprocket. Then install the large bevel gear, with  
the bevel facing away from the reverse sprocket.  
Place thin thrust washer on the countershaft next  
to the bevel gear.  
NOTE  
It is not only important that gears match up diameter-  
wise, but must match up according to thickness. As  
all the gears are placed back into the assembly, pack  
each with bentonite grease.  
COUNTERSHAFT  
LARGE INPUT  
BEVEL GEAR  
THRUST WASHERS  
BEARING  
ASSEMBLY  
THRUST  
WASHER  
NOTE  
THRUST WASHERS  
Depending on model, the bevel may be installed one  
of two ways. For description purposes in this section,  
the model used has the bevel side of the large bevel  
gear facing away from the reverse sprocket; in other  
models the bevel may face toward the reverse sprocket.  
In either case there is a thrust washer placed on the  
counter shaft after the large bevel gear. Some models  
may also have the smallest spur gear machined onto  
the countershaft. In this case the large bevel gear  
must be placed onto the countershaft prior to inserting  
shaft into the reverse sprocket. These models will  
not have a thrust washer placed next to the large bevel  
gear.  
SLEEVE NEEDLE  
BEARING "O"  
RING ASSEMBLY  
THRUST  
BEARING  
SPACER  
WASHER  
6
. In the model pictured above, a thrust washer, thrust  
bearing, thrust washer and sleeved needle bearing  
with an “O” ring are placed on the countershaft next  
to the reverse sprocket. Place a spacer washer  
and sleeved needle bearing with an “O” ring next  
to largest spur gear. Install the sleeved needle  
bearing with the step facing outward and the wider  
portion of the bearing sleeve toward the cover. This  
will be true for all future sleeve bearing installations.  
SHIFT GEARS  
SHIFT  
WASHERS  
NOTE  
On models with the large bevel gear facing in the opposite  
direction, the two thrust washers and the thrust bearing  
will be placed next to the largest spur gear, and the  
spacer washer will be placed next to the reverse  
sprocket. See the diagram at the top of the next page.  
THRUST  
WASHER  
THRUST  
WASHER  
SPUR GEARS  
SHIFTING  
WASHER  
FLAT SIDE  
CUT OUT SIDE  
5
. Build the gears on the countershaft and shifter/  
brake shaft alternately, meshing each gear with  
it’s mating gear on the other shaft. The first gear  
on the shifter/brake shaft is the largest of the shift  
gears. Place this gear next to the neutral spacer  
with the flat side of the gear next to the spacer.  
Place a shift washer onto the shifter/brake shaft  
with the rounded edge towards the shift keys.  
Continue this procedure until all the gears on both  
shafts have been added.  
SPUR GEAR  
BEARING  
ASSEMBLY  
BEARING ASSEMBLY  
7
. Place a large thrust washer next to the last shifting  
gear (this may be a step washer on some models)  
then a sleeved needle bearing with an “O” ring. Place  
the spur gear, small thrust washer and sleeved needle  
bearing with “O” rings on the opposite end of the  
shifter/brake shaft.  
39  
NOTE  
11. Guide cover over shift rod and position onto case.  
Torque cover screws 180-216 inch pounds (20.4-  
Dependent on whether the brake is on the right or the  
left, will determine which end uses a capped sleeved  
needle bearing.  
2
4.5 Nm). Replace the detent ball, spring, and  
set screw. Turn set screw one (1) turn below flush.  
Install the neutral start switch if applicable. Check  
for binding by turning the input shaft.  
8
. Place the output gear on the stepped end of the  
output pinion. Place thrust washers on each end  
and then the large sleeved needle bearings with  
SHIFT ROD  
INDEX SET SCREW  
"
O" rings. The "O" rings protect the axle/wheel  
bearing grease in the sleeved needle bearing from  
the Bentonite grease which lubricates the spur gears.  
Install the three shaft assemblies into the case.  
BEARING  
SLEEVE  
NEEDLE  
BEARING  
OUTPUT GEAR  
"O" RING  
NEUTRAL START  
SWITCH  
"
O" RING  
OUTPUT  
PINION  
NEEDLE  
BEARING  
THRUST  
WASHER SLEEVE  
BEARING  
THRUST  
WASHER  
APPLY LUBRIPLATE  
9
.
Insert differential into the case; position the caged  
ball bearings on the axle ends into the recessed  
areas of the case. Place the bearing cap over the  
sleeved needle bearing of the countershaft and  
torque the bolts 90-100 inch pounds (10.2-11.3  
Nm). Install shifter fan and pack the transaxle  
with remaining bentonite grease. (36 oz. / 1065  
ml total)  
BRAKE  
BRACKET  
1
0. Clean mating surfaces of the case and cover; place  
a continuous thin bead of sealant all around the  
seam. Use Loctite Gasket Eliminator #515,  
Tecumseh Part No. 510334 or the Loctite Silicone  
RTV 598, Tecumseh Part No. 788093.  
BEARING CAP  
SHIFTER  
ASSEMBLY  
12. Apply a light film of lubriplate to the inside lever  
which contacts the brake pins, the outside of the  
lever which contacts the flatwasher, and between  
the shaft O.D. and the I.D. of the splined brake  
disc. The brake pads and brake disc must be free  
of grease and oil. Install brake assembly.  
BALL BEARING  
Install the transmission on the equipment. Adjust  
the brake linkage to disengage when the clutch  
is engaged. The brake and linkages may vary.  
Consult the equipment owner's manual.  
BALL BEARING  
DIFFERENTIAL  
Follow recommended guidelines  
WARNING  
in equipment manufacturer's  
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
40  
820 SERIES TRANSMISSION  
LUBRICATION  
Permanent Lubrication  
6 oz. (1065 ml) of Bentonite grease  
Part No. 788067B  
No acceptable substitute)  
3
(
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
41  
CHAPTER 6. 900 SERIES TRANSAXLES  
DISASSEMBLY OF TRANSAXLE  
It is recommended that you take  
special notice of all items  
WARNING  
Clean outside surface of transaxle. Position shift lever  
in neutral as indicated by the shift pattern.  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
1
. The unit may have the OEM option of a neutral  
start switch, remove the switch.  
When shifting gears verify the  
WARNING  
2
. Remove Allen head setscrew, spring and detent  
ball from the transmission cover and six cap screws  
that fasten the cover to the case.  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
3
4
. Remove cover. Remove shifter assembly (includes  
shift rod, and shifter fan from transaxle by lifting  
shaft out of case.  
DO NOT shift on a hill or when  
WARNING  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
. Remove two brake bracket screws and remove brake  
assembly.  
Use approved safety procedures  
WARNING  
NOTE  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
Remove grease from the unit as parts are removed. It  
will be difficult to keep parts from falling off the  
assemblies. Note position of parts before removal.  
NOTE  
Due to the many variations of equipment braking  
systems, adjustments and repair to these components  
and linkages are not considered warranty.  
SHIFT FAN  
ASSY.  
5
. Remove the gear and shaft assemblies from the  
case half.  
NOTE  
Before disassembly, observe how the bushing tabs  
on the flange bushings fit into recess “V” notches of  
the case. The cover will rock back and forth and not  
rest tightly on the case if these bushing tabs are not  
pressed down in the "V" notches.  
GENERAL  
The 900 series is similar to the 800 series transaxle  
but has only up to 4 speed offerings forward and 1  
reverse. The differential utilizes bearing blocks and  
is retained by the case and cover. This unit contains  
an aluminum tag at location A or B, showing the model  
number.  
COUNTERSHAFT  
OUTPUT SHAFT  
COVER CASE HEX  
INPUT  
SHAFT  
SHIFT ROD  
SCREWS  
"V"  
NOTCHES  
A
B
ID TAG  
SHIFTER/BRAKE  
SHAFT  
6
. To disassemble the countershaft, output pinion and  
shaft assembly, simply pull apart.  
42  
COUNTERSHAFT  
10. DIFFERENTIAL  
7
. Remove the two (2) thrust washers, sprocket, bevel  
gear, spur gears and flanged bushing. The sprocket,  
bevel gear and spur gears are splined to the  
countershaft.  
Remove the top bearing block on the bull gear of  
the differential. Remove the bull gear, bevel pinion  
gears with center shaft, and the axles. Grasp the  
axle bevel gears between your thumb and fingers;  
hold together while lifting differential from case.  
Remove bottom bearing block from case.  
COUNTERSHAFT  
BUSHING  
BEARING BLOCKS  
BEVEL  
GEAR  
AXLE  
2
SNAP RINGS  
WASHER  
BEVEL PINIONS  
RING GEAR  
11. INPUT SHAFT  
OUTPUT GEAR  
Remove retaining ring on bevel gear end from the  
input shaft, remove bevel gear and pull shaft through  
case. The square cut “O” ring must be replaced, if  
removed.  
BUSHING  
PINION GEAR  
SHAFT  
BUSHING  
INPUT  
NEEDLE BEARING  
FLUSH WITH  
HOUSING  
SHAFT  
RETAINING RING  
WASHER  
WASHER  
WASHER  
SQUARE CUT  
"O" RING  
NEEDLE  
BEARINGS  
8
9
. OUTPUT PINION AND SHAFT  
Remove the large brass bushing, large washer,  
large output gear, washer and bushing. The shaft  
and output pinion gear come as an assembly.  
.
.
135" (3.43 mm)  
150" (3.81 mm)  
BEVEL GEAR  
THRUST  
WASHER  
RETAINING RING  
. SHIFTER SHAFT  
Remove the square cut “O” ring (1) and flanged  
bushings (2), thrust washers (2) on shaft ends,  
shift collar with keys, sprocket, spacer, shifter gears  
and thrust washers.  
Tool part no. 670251 is used for removal and  
installation of needle bearings for the input shaft.  
The needle bearing on inboard side is installed  
.
135"-.150” (3.43-3.81 mm) below flush.  
BUSHING  
BUSHING  
KEY  
SHIFTER  
GEAR  
SHIFTER  
COLLAR  
NEUTRAL  
SPACER  
43  
REASSEMBLY  
SHIFT WASHERS  
1
. Apply E.P. grease between bearings in the cover  
and install the input shaft, square cut seal, thrust  
washers, bevel gear and snap ring.  
NOTE  
Needle bearings are lubricated with E.P. grease. Do  
not use bentonite on any needle bearing. For maximum  
gear train life use bentonite grease on shifter/brake  
shaft.  
SHIFTING GEARS  
CUT OUT SIDE  
OFGEAR  
FLAT SIDE OF  
GEAR MUST  
FACE SHOULDER  
ONSHAFT  
MUST FACE  
OUTBOARD  
END OF SHAFT  
2
. Grease both keyways and slide keys and collar on  
the shifter/brake shaft.  
NOTE  
5
. Place the largest of the shifting gears with the flat  
side of the gear next to the neutral spacer. Then  
place a shifting washer with the chamfer on the  
inside diameter of the washer next to the gear. The  
chamfer or rounded side must face towards the  
shifting keys.  
When reassembling the 900 series it is easier to  
assemble the shifter/brake shaft and the countershaft  
at the same time.  
REVERSE SPROCKET  
COLLAR  
"O" RING  
NOTE  
"O" RING  
As all the gears are placed back into the assembly,  
each should be packed with bentonite grease.  
LARGE  
BUSHING  
NEUTRAL SPACER  
3
. Place the reverse chain on the reverse sprockets.  
Make sure the collars on the sprockets are on the  
same side of the chain, facing the brake side, and  
toward the tips of the keys. Slide the keys through  
the sprocket and install the neutral spacer over  
the ends of the shifting keys and pull them back  
until the sprocket touches the shoulder of the shaft.  
WASHER  
THRUST  
WASHER  
THRUST  
WASHER  
6. Next place a thrust washer on each end of the  
countershaft and a bushing on the end of the shaft  
with the largest spur gear.  
7
. On the shifter/brake shaft place a large thrust washer  
next to the smallest shifting gear, next the bronze  
bushing and then an “O” ring.  
NOTE  
Some units will use a stepped thrust washer; place  
the washer onto the shaft so that the step in the washer  
is out and away from the shifting gears.  
SPROCKET  
4
. Insert the splined countershaft into the smaller  
reverse sprocket. Then place the large beveled gear  
on the countershaft with the beveled side of the  
gear towards the reverse sprocket. If the 900 series  
is a 1, 2, or 3 speed forward unit, place a washer  
over the shaft and next to the backside of the large  
bevel gear. If the unit is a speed forward there will  
not be a washer on the inside diameter of the washer  
next to the gear. The chamfer or rounded side must  
face towards the shifting keys.  
8
. The end of the shifter/brake shaft (opposite the  
shifting gears) has a spline. Install the spur gear  
on the spline that drives the output gear. Next install  
the thrust washer, bushing and “O” ring.  
44  
1
1
1
3. Install shifter assembly and pack 26 oz. (769 ml)  
Bentonite grease around bearings, gearing, and  
top of shift fan. Then reinstall the cover on the  
case. Torque cap screws 90-100 inch pounds (10.2-  
WASHER  
WASHER  
11.3 Nm).  
4. Clean the mating surfaces of the case and cover.  
Place a continuous thin bead of sealant all around  
the seam; use Loctite Gasket Eliminator #515,  
Tecumseh part number 510334 or the Loctite  
Silicone RTV 598, Tecumseh Part number 788093.  
FLAT  
BRONZE  
BUSHING  
5. Install index ball, spring, and set screw in that  
order into cover, and slowly tighten the screw one  
(1) turn below flush. If unit contains a neutral start  
switch, reinstall it now.  
9
1
. To assemble the output shaft assembly, place a  
washer and then the bronze bushing with the collar  
Check for binding by turning the input shaft.  
(
flat down) next to the pinion. Place the output  
gear over the pinion as in the diagram above.  
There is a washer on the outside of the gear.  
APPLY LUBRIPLATE  
0. After both shafts are completed, place the flanged  
bushings on each end. Notice that one is larger  
than the other.  
NOTE  
BRAKE  
BRACKET  
The “V” notch on the bushing fits into the recess “V”  
in case.  
11. DIFFERENTIAL ASSEMBLY  
When assembling this unit, first make sure all parts  
are there, because the unit is put together in your  
hands and placed in the case at the same time.  
Axles and gears must be on the center line of the  
ring gear.  
When installed in the case the bearing block must  
have the flange to the left hand side. The bearing  
block in the cover must have the flange to the  
right hand side.  
1
6. Apply a light film of lubriplate to the inside lever  
which contacts the brake pins, the outside of the  
lever which contacts the flatwasher, and between  
the shaft O.D. and the I.D. of the splined brake  
disc. The brake pads and brake disc must be free  
of grease and oil. Install the brake assembly.  
BEARING BLOCK  
Install the transmission on the equipment. Adjust  
the brake linkage to disengage when the clutch  
is engaged. The brake and linkages may vary.  
Consult the equipment owner's manual.  
Follow recommended guidelines  
WARNING  
12. Before installing the differential into the case, apply  
Bentonite grease to the axle bearing areas.  
in equipment manufacturer's  
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
SHIFT FORK  
FAN ASSY.  
45  
900 SERIES TRANSAXLE  
LUBRICATION  
Permanent Lubrication  
2
6 oz. (769 ml) of Bentonite grease  
Part No. 788067C  
No acceptable substitute)  
(
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
46  
CHAPTER 7. 910 SERIES TRANSAXLES  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
DISASSEMBLY OF TRANSAXLE  
WARNING  
Clean the outside surface of transaxle. Position shift  
lever in neutral as indicated by the shift pattern.  
1
. The unit may have the OEM option of a neutral  
start switch; remove the switch.  
When shifting gears verify the  
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
2. Some 910 Series transaxles will have a Allen head  
setscrew, spring and detent ball. Remove these  
and the cap screws that fasten the cover to the  
case.  
DO NOT shift on a hill or when  
WARNING  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
3. Push the shift rod through the cover and lift off.  
Then remove the shifter assembly (which includes  
the shift rod, and shifter fan and lift out of case.  
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
We caution you against the use  
WARNING  
of aftermarket variations of braking  
systems, adjustments and service of these  
components. Removing or altering factory installed  
parts my affect performance and could result in  
death or serious injury.  
4
. Remove the two brake bracket screws and remove  
brake assembly.  
Servicing the braking system will void your  
warranty. See your Authorized Tecumseh  
Servicing Dealer.  
5
. Remove the grease from the unit as the parts are  
removed. Prior to removal of gear shaft assemblies  
from the case, the shifter fan may be removed.  
Note the position of the parts before removal. Some  
parts may come off the shafts upon removal.  
NOTE  
Bentonite grease may stain clothing. Care should be  
used when handling.  
6
. Remove the top bearing block on the bull gear of  
the differential. Remove the bull gear, bevel pinion  
gears with center shaft and the axles.  
GENERAL  
SHIFTER/BRAKE SHAFT  
OUTPUT SHAFT  
The 910 series is available with 1 speed forward and 1  
reverse.  
INPUT SHAFT  
COVER CASE  
HEX SCREWS  
SHIFT ROD  
I.D. TAG  
DIFFERENTIAL REMOVED  
IDENTIFICATION  
This unit contains an aluminum tag showing the model  
number.  
47  
7
. Remove the output shaft assembly and the shifter/  
3. The large beveled shifting gears can be placed onto  
the shifter/brake shaft. The bevels on the gears  
face each other and are separated with a neutral  
spacer. Push shifting keys into the neutral spacer.  
brake shaft assembly.  
SHIFTER/BRAKE SHAFT  
Then place a thrust washer, bronze bushing, and  
an “O” ring on the shaft.  
The spur gear, washer, bushing and “O” ring are  
assembled to the other end of the shaft.  
OUTPUT SHAFT REMOVED  
8
. The input shaft can also be removed and inspected  
or serviced. Remove the snap ring on the bevel  
gear and pull the shaft through the case. The square  
cut “O” ring must be replaced if the shaft is removed.  
BEVEL GEARS  
SPUR GEAR  
Tool part No. 670251, is used for removal and  
installation of needle bearings for the input shaft.  
The needle bearing on the inboard side is installed  
.
135 - .150” (3.43-3.81 mm) below flush.  
SPACER  
NOTE  
Needle bearings are lubricated with E.P. grease. DO  
NOT USE BENTONITE ON NEEDLE BEARINGS. For  
maximum gear train life use only Bentonite grease on  
all shafts and gears, Tecumseh part number 788067C.  
INPUT  
NEEDLE BEARING  
SHAFT  
FLUSH WITH  
HOUSING  
RETAINING RING  
WASHER  
FLAT SIDE  
SQUARE CUT  
"O" RING  
BEVELED SIDE  
NEEDLE  
BEARINGS  
4. Place the shifter/brake shaft assembly in the case.  
.
.
135" (3.43mm)  
150" (3.82mm)  
BEVEL GEAR  
THRUST  
WASHER  
RETAINING RING  
REASSEMBLY  
1
. Apply E.P. grease between the bearings in the  
cover and install the input shaft, bevel gear and  
snap ring.  
5
. Place the output gear onto the output pinion. Install  
the thrust washers and bushings.  
OUTPUT GEAR  
SHIFTER/BRAKE SHAFT  
COLLAR  
KEYS  
2
. Grease both keyways and slide keys and collar  
OUTPUT PINION  
on shifter/brake shaft.  
48  
9
. Install the shifting fan with the pin in the groove of  
the shifting collar. Grease the top of the shift fan.  
Fill the unit with 18 oz. (532 ml) of Bentonite grease.  
Install the top bearing block with the flange to the  
right.  
OUTPUT SHAFT ASSEMBLY  
INPUT SHAFT  
1
0. Clean the mating surfaces of the case and cover;  
place a continuous thin bead of sealant all around  
the seam. Use Loctite Gasket Eliminator #515,  
Tecumseh part number 510334 or the Loctite Silicone  
RTV 598, Tecumseh part number 788093.  
LOWER BEARING BLOCK  
FLANGE TO THE LEFT)  
11. Make sure that the tabs of all the bushings are in  
their “V” notches, install the cover and torque the  
cap screws to 90-100 inch pounds (10.2-11.3 Nm).  
(
6
. Insert the output shaft assembly into the case.  
1
2. Reinstall the ball, spring and set screw on the models  
that have them. The setting for the screw is flush  
to the cover.  
7. Prior to installing the differential into the case, apply  
Bentonite grease to the axle bearing surfaces.  
Check for binding by turning the input shaft.  
BULL GEAR  
BEVEL PINION GEAR ASSEMBLY  
APPLY LUBRIPLATE  
BRAKE  
BRACKET  
AXLE BEVEL GEARS  
NOTE  
The differential must be assembled out of the case  
and then placed in the case.  
8
. Insert the lower bearing block into the case with  
the flange to the left. (See diagram on the top of  
this page.) Place the center shaft with the bevel  
pinion gears into the bull gear of the differential.  
Center the bevel gear on the longest axle with the  
pinion gears of the differential. This axle goes up  
to the side of the bull gear where the center shaft  
is located. On the opposite side of the bull gear,  
center the bevel gear with the other axle. Pick up  
the entire unit and place it in the case as an  
assembly. Reposition the rubber seals on the ends  
of the axles. (If damaged or old, replace them).  
13. Apply a light film of lubriplate to the inside lever  
which contacts the brake pins, the outside of the  
lever which contacts the flatwasher, and between  
the shaft O.D. and the I.D. of the splined brake  
disc. The brake pads and brake disc must be free  
of grease and oil. Install the brake assembly.  
Install the transmission on the equipment. Adjust  
the brake linkage to disengage when the clutch is  
engaged. The brake and linkages may vary. Consult  
the equipment owner's manual.  
NOTE  
With models that have an offset input, the differential  
assembly begins with the shortest axle.  
Follow recommended guidelines  
WARNING  
in equipment manufacturer's  
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
SHIFTER FAN  
RUBBER SEAL  
49  
910 SERIES TRANSAXLE  
LUBRICATION  
Permanent Lubrication  
1
8 oz. (532 ml) of Bentonite grease  
Part No. 788067C  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
50  
CHAPTER 8. 915 SERIES / 940 SERIES TRANSAXLES  
It is recommended that you take  
WARNING  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
When shifting gears verify the  
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
IDENTIFICATION TAG  
DO NOT shift on a hill or when  
WARNING  
IDENTIFICATION  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
This unit contains an aluminum tag showing the model  
number.  
DISASSEMBLY OF TRANSAXLES  
Use approved safety procedures  
WARNING  
with equipment for removal/  
Clean the outside surface of transaxle. Position shift  
lever in neutral as indicated by the shift pattern.  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
1. The unit may have the OEM option of a neutral  
start switch, remove the switch.  
2
. 915/940 Series transaxles will have a Allen head  
setscrew, spring and detent ball. Remove these  
and the cap screws that fasten the cover to the  
case.  
We caution you against the use  
WARNING  
of aftermarket variations of braking  
systems, adjustments and service of these  
components. Removing or altering factory installed  
parts my affect performance and could result in  
death or serious injury.  
3. Push the shift rod through the cover and lift off.  
Then remove the shifter assembly (which includes  
the shift rod, and shifter fan) and lift out of case.  
Servicing the braking system will void your  
warranty. See your Authorized Tecumseh  
Servicing Dealer.  
4. Remove the “O” ring from the top of the shifter rod.  
INDEX BALL AND  
SPRING LOCATION  
SHIFTER/BRAKE/  
OUTPUT SHAFT  
ASSEMBLY  
OPTIONAL INPUT LOCATION  
A INPUT  
INPUT SHAFT  
COVER/CASE HEX B INPUT  
SCREWS (17)  
COUNTERSHAFT  
ASSEMBLY  
SHIFT ROD  
OPTIONAL SHIFT ASSEMBLY  
ROD LOCATION  
BRAKE BRACKET  
SCREWS  
SHIFT ROD  
NEUTRAL START SWITCH LOCATION (OPTIONAL)  
5. Remove the two brake bracket screws and remove  
brake assembly.  
GENERAL  
6
. Remove the grease from the unit as the parts are  
removed.  
The 915 series transaxle has a sculptured case, gear  
driven reverse and a unique power flow. The 915 series  
has 3, 4, 5 or 6 speeds forward and 1 speed reverse.  
The model pictured throughout this section utilizes  
an A input. Assembly variations for models with a B  
input or reverse input will be explained in the appropriate  
segment.  
NOTE  
Bentonite grease may stain clothes. Care should be  
used when handling.  
51  
9
40 SERIES  
9. As these assemblies are taken apart, lay the parts  
out in a systematic order. This will help to make  
reassembly and inspection of parts easier. Clean  
grease from each part as the parts are laid out. To  
remove keys from the shifter/brake/output shaft you  
must remove the large snap ring from its groove.  
Be careful not to stretch or twist the snap ring; it  
is not necessary to remove the snap ring from shaft.  
The 940 Series is identical to the 915 Series with the  
exception of 3 added bronze bushings. These bushings  
is located on the shifter brake shaft one opposite the  
brake rotor end. The other two are located on the spur  
gear shaft, one on each end.  
7
. Remove the bearing strap on the bull gear of the  
differential. Remove the bull gear, bevel pinion gears  
with center shaft, and the axles. Grasp the axle  
bevel gears between your thumb and fingers, hold  
together while lifting differential from the case.  
SHIFTER/BRAKE SHAFT ASSEMBLY  
BEARING STRAP  
DIFFERENTIAL  
BULL GEAR  
AXLE BEVEL  
GEAR  
SNAP RING  
1
0. The input shaft can also be removed and inspected  
or serviced. Remove the snap ring on the bevel  
gear and pull the shaft through the case. The square  
cut “O” ring must be replaced if the shaft is removed.  
8
. There are two (2) shaft assemblies in this transaxle;  
the countershaft and the shifter/brake/output shaft  
assembly. Remove these two shafts as complete  
assemblies from the case.  
Tool part No. 670251, is used for removal and  
installation of needle bearings for the input shaft.  
The needle bearing on the inboard side is installed  
.
135 - .150” (3.43-3.81 mm) below flush.  
NOTE  
NOTE  
Depending on the rotation of the countershaft gears,  
the reverse idler assembly will be located either above  
the reverse gears and held in place by bosses in the  
cover or below the reverse gears and held in place by  
bosses in the case. The reverse idler assembly will  
always be located against the thrust of the countershaft  
reverse gear.  
NeedlebearingsarelubricatedwithE.P.grease.DO  
NOT USE BENTONITE ON NEEDLE BEARINGS. For  
maximum gear train life use only Bentonite grease on  
all shafts and gears, Tecumseh part number 788067C.  
INPUT  
SHAFT  
NEEDLE BEARING  
FLUSH WITH  
HOUSING  
RETAINING RING  
WASHER  
SQUARE CUT  
"O" RING  
NEEDLE  
BEARINGS  
.
.
135" (3.43 mm)  
150" (3.81 mm)  
BEVEL GEAR  
THRUST  
WASHER  
RETAINING RING  
SHIFTER/BRAKE/  
OUTPUT SHAFT  
ASSEMBLY  
COUNTERSHAFT  
REVERSE IDLER  
ASSEMBLY  
ASSEMBLY  
52  
REASSEMBLY  
LARGE BEVEL GEAR  
OUTPUT GEAR  
1
. Apply grease between the bearings in the cover  
and install the input shaft, square cut seal, thrust  
washers, bevel gear and snap ring.  
SNAP RING GROOVE  
THIN SHIFTING  
WASHER  
4
. On the Shifter/brake shaft the last shifting washer  
will be a thin flat washer installed prior to the large  
bevel gear. The style of input will determine how  
the large bevel gear will be installed. In the model  
pictured, input “A” is used and the bevel is inward  
towards the keys. On models with a “B” input the  
bevel will be outward or away from the keys.  
SNAP RING  
2
. Grease all keyways and slide keys and collar onto  
the shifter/brake/output shaft. On models which  
have a inner diameter recess cut into one side of  
the shift collar, the recess side must face toward  
the gears and snap ring for proper gear selection.  
Place the large snap ring back into the snap ring  
groove. On five speed models that do not use the  
large bevel gear for the highest speed, an additional  
neutral spacer will be placed between the snap  
ring and the shift collar.  
In both instances the gear cut directly onto the  
large bevel gear will be toward the outside of the  
case. Install a washer and then the output gear.  
The output gear has an inner diameter recess on  
one end, this recess must face toward the large  
bevel gear. Two washers are installed next to the  
output gear followed by a bronze bushing and rubber  
O” ring. Then place a washer on the opposite end  
REVERSE SHIFT GEAR  
of the shaft to complete the assembly of the shifter/  
brake shaft.  
SHIFT GEARS  
SHIFT WASHERS  
REVERSE GEAR COLLAR  
LOCATION FOR SPACER  
SOME MODELS)  
NEUTRAL SPACER  
(
5
. The countershaft must have the longer unsplined  
end toward the outside or brake side of the case  
and the shorter unsplined end toward the shifter  
assembly. The wide washer or spacer is placed  
on the longer unsplined end followed by the largest  
spur gear.  
SHIFTING WASHER  
CUT OUT SIDE  
FLAT SIDE  
NOTE  
If assembling a six speed or on some five speed  
models, a spacer will be placed next to the largest  
spur gear. On all other models, leave a space the  
width of the large bevel gear and then assemble  
the remainder of the spur gears with the reverse  
spur gear assembled with the collar side inward.  
The small washer is placed next to the reverse  
spur gear to complete the counter shaft assembly.  
As all the gears are placed back into the assembly,  
each should be packed with Bentonite grease.  
3
. The shafts in this transaxle can be assembled  
separately. After replacing the snap ring into its’  
groove, place the reverse shifter gear onto the shaft  
with the flat side next to the snap ring. Push the  
shifting keys through the reverse gear and push  
the neutral spacer over the end of the keys and  
pull the neutral spacer and reverse gear up against  
the snap ring. Next place the shifting gear onto  
the shaft with the flat side next to the neutral collar.  
The two assembled shafts can now be placed into  
the transaxle case. If the model has the reverse  
idler held in place by the case, insert the reverse  
idler into the case prior to the shafts.  
Then place a shifting washer onto the shaft with  
the rounded edge towards the shifting keys.  
Continue this procedure until all the gears and  
washers have been added in their proper sequence.  
53  
NOTE  
Clean the mating surfaces of case and cover; place  
a continuous thin bead of sealant all around the  
seam. Use Loctite Gasket Eliminator #515 ,  
Tecumseh part number 510334 or the Loctite  
Silicone RTV 598, Tecumseh part number 788093A.  
Depending on the rotation of the countershaft gears,  
the reverse idler assembly will be located either above  
the reverse gears and held in place by the bosses in  
the cover, or below the reverse gears and held in place  
by the bosses in the case. The reverse idler assembly  
will always be located against the thrust of the  
countershaft reverse gear. Make sure that the tab on  
the bronze bushing is located into the recess provided  
in the case.  
8
. Guide the cover over the shift rod and position onto  
the case. Install the cover cap screws and torque  
9
0-100 inch pounds (10.2-11.3 Nm). Install the  
neutral start sensing switch if applicable. Replace  
the square cut “O” ring on the exposed shift rod.  
Check for binding by turning input shaft.  
APPLY LUBRIPLATE  
NOTE  
The differential must be assembled out of the case  
and then placed in the case. Apply Bentonite grease  
anywhere the axle contacts the case.  
BRAKE  
BRACKET  
6
. Place the center shaft with the bevel pinion gears  
into the bull gear of the differential. Center the bevel  
gear of one axle with the pinion gears of the  
differential. Center the bevel gear of the other axle  
to the pinion gears of the differential. Pick up the  
entire unit and place it in the case as an assembly.  
Reposition the rubber seals on the ends of the  
axles in their bosses. (If damaged or old replace  
them).  
7
. Install the shifter assembly, bearing strap and reverse  
idler assembly (if applicable). Pack the transaxle  
with the remaining Bentonite grease (10 ounces  
9. Apply a light film of lubriplate to the inside lever  
which contacts the brake pins, the outside of the  
lever which contacts the flatwasher, and between  
the shaft O.D. and the I.D. of the splined brake  
disc. The brake pads and brake disc must be free  
of grease and oil. Install brake assembly.  
[
296 ml] total). Replace the spring, set screw and  
the detent ball.  
Install the transmission on the equipment. Adjust  
the brake linkage to disengage when the clutch is  
engaged. The brake and linkages may vary. Consult  
the equipment owner's manual.  
Follow recommended guidelines  
WARNING  
in equipment manufacturer's  
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
54  
915 SERIES / 940 SERIES TRANSAXLES  
LUBRICATION  
Permanent Lubrication  
0 oz. (296 ml) of Bentonite grease  
1
Part No. 788067C  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
55  
CHAPTER 9. 920 SERIES TRANSAXLES  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
DISASSEMBLY OF TRANSAXLE  
WARNING  
Clean outside surface of transaxle. Position shift lever  
in neutral as indicated by the shift pattern.  
1. The unit may have the OEM option of a neutral  
start switch; remove the switch.  
When shifting gears verify the  
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
2
. Removethe Allenheadsetscrew,springanddetent  
ball. Remove the cap screws that fasten the cover  
to the case.  
DO NOT shift on a hill or when  
WARNING  
3. Push the shift rod through the cover and lift off.  
Then remove the shifter assembly (which includes  
the shift rod and shifter fan) and lift out of case.  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
NOTE  
Due to the many variations of equipment braking  
systems, adjustments and repair to these components  
and linkages are not considered warranty.  
NOTE  
Some models will have the index ball and spring on  
the case end of the shift rod. Be careful not to lose  
parts when removing shift rod assembly.  
4. Remove the two brake bracket screws and remove  
the brake assembly.  
5. Remove the grease from the unit as the parts are  
removed.  
NOTE  
Bentonite grease may stain clothes. Care should be  
used when handling.  
GENERAL  
6
. Remove the top bearing block on the bull gear of  
the differential. Remove the bull gear, bevel pinion  
gears with center shaft and the axles. Grasp the  
axle bevel gears between your thumb and fingers,  
holding together while lifting differential from case.  
The 920 series transaxle is very similar to the 900  
series. The 920 series is available in 5, 6, or 7 speeds  
forward and 1 speed reverse. The 7 speed transaxle  
is shown in this section of this manual.  
CASE COVER  
INPUT SHAFT  
HEX SCREWS  
SHIFT ROD  
A
B
ID TAG  
IDENTIFICATION  
This unit contains an aluminum tag showing the model  
number.  
56  
7
. There are three (3) shaft assemblies in this transaxle;  
the output shaft, the countershaft, and the shifter/  
brake shaft assembly. Remove these assemblies  
as complete as possible from the case.  
REASSEMBLY  
1. Apply grease between the bearings in the cover  
and install the input shaft, square cut seal, thrust  
washers, bevel gear and snap ring.  
COUNTERSHAFT ASSEMBLY  
OUTPUT SHAFT ASSEMBLY  
SHIFTER/BRAKE SHAFT  
SHIFT COLLAR  
KEYS  
2. Grease both keyways and slide the shift keys and  
collar onto the shifter/brake shaft.  
3
. The countershaft and the shifter/brake shaft should  
be assembled at the same time. Start by placing  
the reverse chain over the reverse sprockets. Make  
sure the collars on the sprockets are on the same  
side of the chain and install the sprocket onto the  
shifter/brake shaft with the collar away from the  
shift keys.  
SHIFTER/BRAKE SHAFT ASSEMBLY  
8
. As these assemblies are taken apart, lay the parts  
out in a systematic order. This will help to make  
reassembly easier and inspection of all parts  
possible. Clean each part of grease as the parts  
are laid out.  
LARGE  
LARGER  
INNER  
RADIUS  
DIAMETERS  
SPACER  
FACE EACH  
TOWARD  
OTHER  
SHIFT KEYS  
REVERSE CHAIN AND  
SPROCKETS  
SPROCKET  
COLLARS  
9
. The input shaft can also be removed and inspected  
or serviced. Remove the snap ring on the bevel  
gear and pull the shaft through the case. The square  
cut “O” ring must be replaced if the shaft is removed.  
Tool part No. 670251, is used for removal and  
installation of needle bearings for the input shaft.  
The needle bearing on the inboard side is installed  
.
135" - .150" (3.43-3.81 mm) below flush.  
NEUTRAL SPACER  
Next place the neutral spacers onto the shifter/  
brake shaft with larger inner diameter sides facing  
together, and the spacer with the largest inner  
diameter radius toward the shift keys. Push the  
shifting keys through the reverse sprocket and the  
first neutral spacer. Pull the neutral spacers and  
the reverse sprocket up against the shoulder of  
the shifter/brake shaft.  
INPUT  
SHAFT  
NEEDLE BEARING  
FLUSH WITH  
HOUSING  
RETAINING RING  
WASHER  
SQUARE CUT  
"O" RING  
NEEDLE  
BEARINGS  
.
.
135" (3.43 mm)  
150" (3.81 mm)  
NOTE  
BEVEL GEAR  
There have been a few 900 models built with identical  
neutral collar halves. These can be installed in either  
direction.  
THRUST  
WASHER  
RETAINING RING  
NOTE  
Needle bearings are lubricated with E.P. grease. DO  
NOT USE BENTONITE on needle bearings. For  
maximum gear train life use only Bentonite grease on  
all shafts and gears, Tecumseh part number 788067C.  
57  
*
4.Insert the countershaft into the smaller reverse  
sprocket. Insert a thin thrust washer next to the  
sprocket (collar side) and then install the large bevel  
gear with the bevel towards the reverse sprocket.  
Place another thin thrust washer on the back side  
of the bevel gear.  
SPACER  
NOTE  
As all the gears are placed back onto the assembly,  
each should be packed with bentonite grease.  
BEVEL GEAR  
COUNTERSHAFT  
SPUR GEAR  
"O" RING  
6
. Place the spacer on the countershaft next to the  
reverse sprocket. Then place a thrust washer on  
each end of the countershaft and insert the bronze  
bushings.  
Place the large washer on the end of the shifter/  
brake shaft, followed by the bronze bushing and  
the “O” ring.  
7
. Place the spur gear onto the splines on the other  
end of the shifter/brake shaft. The thin washer,  
bushing, and “O” ring conclude the assembly of  
these two shafts.  
WASHER  
WASHER  
OUTPUT PINION  
SHIFTING WASHER  
CUT OUT SIDE  
FLAT SIDE  
BUSHING  
BUSHING  
OUTPUT GEAR  
5
. Build the gears on the countershaft and shifter/  
brake shaft alternately, meshing each gear with  
it’s mating gear on the opposite shaft. The first  
gear on the shifter/brake shaft would be the largest  
of the shift gears. Place this gear next to the neutral  
collar with the flat side of the gear next to the collar.  
8. Place the output gear on the stepped end of the  
output pinion. Place the thrust washers and the  
bronze bushings on the ends of the output shaft.  
Install these three shaft assemblies back into the  
case. Make sure that the tabs of all bushings are  
in their “V” notches in the case.  
(
See the drawing on the prior page).  
Then place a shifting washer onto the shifter/brake  
shaft with the rounded edge towards the shifting  
keys. Continue this procedure until all the gears  
on both shafts have been added.  
NOTE  
The differential must be assembled out of the case  
and then placed in the case. Apply bentonite grease  
to axle contact areas of case.  
NOTE  
It is not only important that gears match up according  
to diameter, but also to thickness.  
*
ASSEMBLY VARIATIONS  
On models which are driven from the opposite side of  
the input bevel gear, the following changes take place.  
A slightly thicker large bevel gear is placed on the  
countershaft with the bevel facing the spur gears and  
in the previous location of the spacer. The thickness  
of the gear eliminates the need for the washers on  
each side of the large bevel gear. The reverse chain  
o
and sprocket are also turned 180 , which places the  
sprocket collars away from shifting gears and spur  
gears. The spacer is then placed in the previous location  
of the large bevel gear next to the reverse sprocket.  
58  
1
2. Guide the cover over the shift rod and position onto  
CENTER SHAFT  
the case. Install the cover cap screws and torque  
BEVEL GEAR  
9
0-100 inch pounds (10.2-11.3 Nm). Install the  
neutral start sensing switch if applicable. Replace  
the square cut “O” ring on the exposed shift rod.  
Replace the detent ball, spring and set screw and  
turn set screw one (1) turn below flush. Install the  
neutral start sensing switch if applicable.  
BEVEL GEAR  
BEVEL PINION  
GEARS  
Check for binding by turning the input shaft.  
BULL GEAR  
APPLY LUBRIPLATE  
9
. Place the center shaft with the bevel pinion gears  
into the bull gear of the differential. Center the bevel  
gear on the longest axle with the pinion gears of  
the differential. Center the bevel gear of the other  
axle on the other side. Pick up the entire unit and  
place it in the case as an assembly. Reposition  
the rubber seals on the ends of the axles in their  
bosses. (If damaged or old replace them).  
BRAKE  
BRACKET  
1
3. Apply a light film of lubriplate to the inside lever  
which contacts the brake pins, the outside of the  
lever which contacts the flat washer, and between  
the shaft O.D. and the I.D. of the splined brake  
disc. The brake pads and brake disc must be free  
of grease and oil. Install brake assembly.  
1
0. Install the shifter assembly and bearing strap, pack  
the transaxle with the remaining Bentonite grease  
Install the transmission on the equipment. Adjust  
the brake linkage to disengage when the clutch  
is engaged. The brake and linkages may vary.  
Consult the equipment owner's manual.  
(
30 ounces [887 ml] total). Apply grease to the  
top of the shifter fan.  
Follow recommended guidelines  
in equipment manufacturer's  
WARNING  
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
1
1. To seal the case and cover at the end of the shifter/  
brake shaft, a flat plug is placed on the opposite  
end of the brake assembly. Clean the mating  
surfaces of case and cover; place a continuous  
thin bead of sealant all around the seam. Use Loctite  
Gasket Eliminator # 515, Tecumseh part number  
5
10334 or the Loctite Silicone RTV 598, Tecumseh  
part number 788093A.  
59  
920 SERIES TRANSAXLES  
LUBRICATION  
Permanent Lubrication  
3
0 oz. (887 ml) of Bentonite grease  
Part No. 788067C  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
60  
CHAPTER 10. 930 SERIES TRANSAXLES  
It is recommended that you take  
special notice of all items  
IDENTIFICATION  
WARNING  
This unit contains an aluminum tag showing the model  
number.  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
COVER CASE  
HEX SCREWS  
When shifting gears verify the  
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
DO NOT shift on a hill or when  
WARNING  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
BRAKE BRACKET SCREWS  
Use approved safety procedures  
WARNING  
DISASSEMBLY OF TRANSAXLE  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
Clean outside surface of transaxle. Position shift lever  
in neutral as indicated by the shift pattern.  
1. The unit may have the OEM option of a neutral  
switch; remove the switch.  
2
. Removethe Allenheadsetscrew,springanddetent  
ball. Remove the cap screws that fasten the cover  
to the case.  
NOTE  
Due to the many variations of equipment braking  
systems, adjustments and repair to these components  
and linkages are not considered warranty.  
3
. Push the shift rod through the cover and lift off.  
Then remove the shifter assembly (which includes  
the shift rod, and shifter fan) and lift out of case.  
INPUT SHAFT  
DIFFERENTIAL  
BEARING STRAP  
IDENTIFICATION TAG  
INDEX BALL,  
SPRING AND  
SET SCREW  
OUTPUT SHAFT  
ASSEMBLY  
SHIFT ROD  
SHIFTER/BRAKE  
SHAFT ASSEMBLY  
COVER/CASE  
HEX SCREWS  
BRAKE BRACKET SCREWS  
(BRAKE CAN BE ON RIGHT  
OR ON LEFT SIDE)  
COUNTERSHAFT  
ASSEMBLY  
NEUTRAL START SWITCH  
LOCATION (OPTIONAL)  
SHIFTER ASSEMBLY  
LOCATION  
4
. Remove the “O” ring from the top of the shifter rod.  
GENERAL  
5. Remove the two brake bracket screws and remove  
brake assembly.  
The 930 series transaxle is very similar to the 920  
series. The 930 series is available in 3 through 7 speeds  
forward and 1 speed reverse. The model pictured  
throughout this section is the most popular type. There  
are models which operate in the opposite direction  
without changing the input location. Throughout this  
section an asterik (*) will direct the reader to the end  
of the section where the differences between these  
models are explained.  
6. Remove the grease from the unit as the parts are  
removed.  
NOTE  
Bentonite grease may stain clothes. Care should be  
used when handling.  
61  
BEARING STRAP  
INPUT  
SHAFT  
NEEDLE BEARING  
FLUSH WITH  
HOUSING  
DIFFERENTIAL  
BULL GEAR  
RETAINING RING  
WASHER  
SQUARE CUT  
"O" RING  
AXLE BEVEL  
GEAR  
NEEDLE  
BEARINGS  
.
.
135" (3.43 mm)  
150" (3.81 mm)  
BEVEL GEAR  
THRUST  
WASHER  
RETAINING RING  
1
0. The input shaft can also be removed and inspected  
or serviced. Remove the snap ring on the bevel  
gear and pull the shaft through the case. The square  
cut “O” ring must be replaced if the shaft is removed.  
7
. Remove the bearing strap on the bull gear of the  
differential. Remove the bull gear, bevel pinion gears  
with center shaft and the axles. Grasp the axle  
bevel gears between your thumb and fingers and  
hold together while lifting differential from case.  
Tool part No. 670251, is used for removal and  
installation of needle bearings for the input shaft.  
The needle bearing on the inboard side is installed  
.
135 - .150” (3.43-3.81 mm) below flush.  
OUTPUT SHAFT  
ASSEMBLY  
COUNTERSHAFT ASSEMBLY  
NOTE  
Needle bearings are lubricated with E.P. grease. DO  
NOT USE BENTONITE on needle bearings. For  
maximum gear train life use only Bentonite grease on  
all shafts and gears, Tecumseh part number 788067C.  
REASSEMBLY  
1
. Apply grease between the bearings in the cover  
and install the input shaft, square cut seal, thrust  
washers, bevel gear and snap ring.  
SHIFTER/BRAKE SHAFT  
SHIFT COLLAR  
SHIFTER/BRAKE SHAFT ASSEMBLY  
8
. There are three (3) shaft assemblies in this transaxle;  
the output shaft, the countershaft, and the shifter/  
brake shaft assembly. Remove these assemblies  
as complete as possible from the case.  
KEYS (2 OR 4)  
SNAP RING  
2
. Grease all keyways and slide keys and collar onto  
the shifter/brake shaft. (There are both 2 and 4  
key models). Place the large snap ring back into  
the snap ring groove. On models which have an  
inner diameter recess cut into one side of the shift  
collar, the recess side must face toward the gears  
and snap ring for proper gear selection.  
SNAP RING GROOVE  
SNAP RING  
9
. As these assemblies are taken apart, lay the parts  
out in a systematic order. This will help to make  
reassembly easier and inspection of all parts  
possible. Clean each part of grease as the parts  
are laid out.  
To remove keys from the shifter/brake shaft you  
must first remove the large snap ring from the snap  
ring groove. Be careful not to stretch or twist the  
snap ring; it is not necessary to remove the snap  
ring from the shaft.  
62  
N AND  
R  
THRUST  
WASHER  
SPACER  
BUSHING  
SPROCKET COLLARS  
NEUTRAL SPACER  
SNAP RING  
WASHER  
BUSHING  
THRUST WASHER  
*
3. To assemble this transaxle the countershaft and  
the shifter/brake shaft should be assembled at the  
same time. Start by placing the reverse chain over  
the reverse sprockets. Make sure that the collars  
on the sprockets are on the same side of the chain.  
Install a large washer onto the shifter/brake shaft  
next to the snap ring and then the large sprocket  
with the collar away from the shifting keys. Push  
the shifting keys through the reverse sprocket and  
push the neutral spacer over the end of the keys.  
Pull the neutral spacer and reverse sprocket up  
against the snap ring on the shifter/brake shaft.  
"O" RING  
WASHER  
*6. Place the spacer on the countershaft next to the  
reverse sprocket. Then place a thrust washer on  
each end of the countershaft and insert the bronze  
bushings.  
Place the large washer on the end of the shifter/  
brake shaft, the bronze bushing and the “O” ring.  
BEVEL GEAR  
WASHER  
WASHER  
SPUR GEAR  
COUNTERSHAFT  
SPUR GEAR  
WASHER  
*
4. Insert the countershaft into the smaller reverse  
sprocket. Insert a thin thrust washer next to the  
sprocket (collar side) and then install the large  
bevel gear with the bevel towards the reverse  
sprocket. Place another thin thrust washer on the  
back side of the bevel gear.  
BUSHING  
7
. Place the spur gear onto the splines on the other  
end of the shifter/brake shaft. The thin washer and  
bushing conclude the assembly of these two shafts.  
NOTE  
As all the gears are placed back into the assembly,  
each should be packed with Bentonite grease.  
WASHER  
WASHER  
SPUR GEARS  
BUSHING  
BUSHING  
OUTPUT  
PINION  
SHIFT GEARS SHIFTING CUT OUT FLAT  
SHIFT WASHERS  
OUTPUT GEAR  
WASHER  
SIDE  
SIDE  
5
. Build the gears on the countershaft and shifter/  
brake shaft alternately, meshing each gear with  
its mating gear on the other shaft. The first gear  
on the shifter/brake shaft would be the largest of  
the shifting gears. Place this gear next to the neutral  
spacer with the flat side of the gear next to the  
spacer.  
8. Place the output gear on the stepped end of the  
output pinion. Place the thrust washers on each  
end and then the bronze bushings. Install these  
three shaft assemblies back into the case. Make  
sure that the tabs of all the bushings are in their  
V” notches in the case.  
Then place a shifting washer onto the shifter/brake  
shaft with the rounded edge towards the shifting  
keys. Continue this procedure until all the gears  
on both shafts have been added.  
NOTE  
It is not only important that gears match up according  
to diameter, but also to thickness.  
*
See Assembly Variations on page 64  
63  
CENTER SHAFT  
APPLY LUBRIPLATE  
BEVEL GEAR  
BRAKE  
BRACKET  
BEVEL GEAR  
BEVEL PINION GEARS  
BULL GEAR  
NOTE  
The differential must be assembled out of the case  
and then placed in the case. Apply bentonite grease  
to axle contact areas of case.  
1
2. Apply a light film of lubriplate to the inside lever  
which contacts the brake pins, the outside of the  
lever which contacts the flat washer, and between  
the shaft O.D. and the I.D. of the splined brake  
disc. The brake pads and brake disc must be free  
of grease and oil. Install brake assembly.  
9
. Place the center shaft with the bevel pinion gears  
into the bull gear of the differential. Center the bevel  
gear on the longest axle with the pinion gears of  
the differential. Center the bevel gear on the other  
axle with the other side. Pick up the entire unit  
and place it in the case as an assembly. Reposition  
the rubber seals on the ends of the axles in their  
bosses. (If damaged or old replace them).  
Install the transmission on the equipment. Adjust  
the brake linkage to disengage when the clutch  
is engaged. The brake and linkages may vary.  
Consult the equipment owner's manual.  
Follow recommended guidelines  
in equipment manufacturer's  
WARNING  
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
*
ASSEMBLY VARIATIONS  
1
0. Install the shifter assembly and bearing strap, pack  
the transaxle with the remaining Bentonite grease  
On models which are driven from the opposite side  
of the input bevel gear the following changes take  
place.  
(
30 ounces total) (887 ml). Apply grease to the  
top of the shifter fan.  
A slightly thicker large bevel gear is placed on the  
countershaft with the bevel facing the spur gears  
and in the previous location of the spacer. The  
thickness of the gear eliminates the need for the  
washers on each side of the large bevel gear, which  
places the sprocket collars away from the shifting  
gears and spur gears. The reverse chain and sprocket  
o
is also turned 180 . The spacer is then placed in  
the previous location of the large bevel gear next  
to the reverse sprocket.  
1
1. To seal the case and cover at the end of the shifter/  
brake shaft, a flat plug is placed on the opposite  
end of the brake assembly. Clean the mating  
surfaces of case and cover; place a continuous  
thin bead of sealant all around the seam. Use Loctite  
Gasket Eliminator # 515, Tecumseh part number  
5
10334 or the Loctite Silicone RTV 598, Tecumseh  
part number 788093A. Install cover screws and  
torque to 90-100 inch pounds (10.2-11.3 Nm).  
Replace the detent ball, spring and set screw and  
turn set screw one (1) turn below flush. Install the  
neutral start sensing switch if applicable.  
Check for binding by turning input shaft.  
64  
930 SERIES TRANSAXLES  
LUBRICATION  
Permanent Lubrication  
3
0 oz. (887 ml) of Bentonite grease  
Part No. 788067C  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
65  
CHAPTER 11. MST200 SERIES TRANSAXLES  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
IDENTIFICATION  
WARNING  
The MST has a decal placed at the rear of the unit  
and to the right of the differential gear section. This  
makes it easily visible without having to remove any  
obstructions to view it.  
When shifting gears verify the  
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
DO NOT shift on a hill or when  
WARNING  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
Use approved safety procedures  
WARNING  
IDENTIFICATION TAG  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
STEPS TO TAKE BEFORE DISASSEMBLY.  
1
. Clean the outside surface of the transaxle.  
. Position the shift lever in the neutral position.  
2
We caution you against the use  
WARNING  
of aftermarket variations of braking  
systems, adjustments and service of these  
components. Removing or altering factory installed  
parts my affect performance and could result in  
death or serious injury.  
Servicing the braking system will void your  
warranty. See your Authorized Tecumseh  
Servicing Dealer.  
SQUARE CUT O-RING  
AND PUSH NUT  
REMOVE FILL PLUG  
3
. Remove the oil drain / fill plug located on top of the  
unit. This can be done by using a needle nose  
pliers to pull the plug out. Drain all of the oil from  
the unit.  
CUSTOMER  
MOUNT POINTS  
4. Remove the neutral start switch, if installed (O.E.M.  
option).  
(PRY POINT)  
GENERAL  
5
. Remove the push nut (if equipped) and square cut  
The MST (Manual Shift Transaxle) 200 is a sealed  
unit which uses 16 oz. (473 ml) of 80W90 gear lube  
"
O" ring, from the top of the shift fork shaft.  
(
part #730229B). The MST series is available with up  
to 6 speeds forward and one reverse. It has a contoured  
case and cover. Its unique gear design system uses  
the input gear to drive both the forward and reverse  
motion. It also eliminates the recess previously found  
on shifter brake shaft spur gears.  
Thrust washers are used on all transaxles to protect  
stationary surfaces from rotating surfaces. To determine  
the location of the thrust washer, check its inside  
diameter and compare it to the outside diameter of  
the shaft. If the fit is loose, it is out of position. The flat  
washer used on the shifter shaft (brake end) must  
have a diameter large enough to stop the keys from  
going past the end of the gear slots.  
ALLEN HEAD SET SCREW  
SPRING  
DETENT BALL  
6. Remove the set screw, spring and detent ball.  
66  
DISASSEMBLY  
SEAL  
BUSHING CHAMFERED SHIFT WASHERS  
1.  
Remove the self-tapping hex head screws that hold  
the cover to the case and the two center screws  
located on the bottom (case side) of the transaxle.  
THRUST WASHER  
When prying the crankcase from  
CAUTION  
the crankcase cover use specified  
THRUST WASHER  
mount points. Failure to do so may result in  
equipment damage.  
SPUR GEAR  
2
.
With a rubber or leather mallet tap down on the  
shift lever rod while removing the cover from the  
case.  
NOTE: INSIDE RECESS FACES KEYS  
7.  
To disassemble the shifter/brake shaft, start on  
the spur gear side. Remove the oil seal, the bronze  
bushing and thrust washer. Remove all of the shifter  
spur gears (and spacers if used) and shift washers.  
Remove the neutral collar, reverse gear and thrust  
washer. On the output side of the shifter/brake  
shaft remove the bronze bushing, thrust washer,  
and output spur gear.  
NOTE  
If rust has occurred on the shaft, remove it with emery  
cloth before removing the shaft to prevent damage.  
3
.
Remove the two brake bracket screws and remove  
the brake assembly.  
4.  
Remove the differential ring gear, and bevel pinion  
gears with the center shaft drive pin and the axles.  
Grasp the axle bevel gears between your thumb  
and fingers. Hold the entire assembly together while  
lifting the differential from the case.  
To remove the shift keys from the shifter/brake  
shaft, you must first expand the large snap ring  
from the snap ring groove. Be careful not to stretch  
or twist the snap ring, it is not necessary to remove  
the snap ring from the shaft. Place the expanded  
snap ring onto the shifter/brake shaft and slide  
the shift keys and shift collar off the shifter/brake  
shaft.  
NOTE: When a "B" input is used the input bevel gears will be  
opposite of this picture. The drive spline on this shaft also  
moves.  
NOTE: When a "B" input is used the input bevel gears will be  
opposite of this picture. The drive spline on this shaft also  
moves.  
REVERSE FOR B INPUT  
REVERSE DRIVE BEVEL GEAR  
FORWARD DRIVE BEVEL GEAR  
5
.
There are three shaft assemblies in this transaxle.  
The countershaft, shifter/brake shaft and output  
shaft. Remove the shifter fork assembly and then  
remove the shaft assemblies from the case.  
8
. To disassemble the counter spur gear shaft, remove  
the bushing, thrust washer and spur gears (and  
spacers if used) the last spur gear is held in place  
by a retaining ring. Remove the retaining ring and  
slide the spur gear and forward drive bevel gear off  
the splined end of the shaft. The bushing, thrust  
washer and reverse drive bevel gear can be removed  
from the unsplined end of the shaft.  
NOTE  
Before you begin disassembly, ask the customer if  
the unit has been serviced previously by a technician  
or perhaps himself. They may have misassembled it.  
6.  
As these assemblies are taken apart, lay the parts  
out in a systematic order. This should help to make  
the reassembly easier.  
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
67  
REASSEMBLY  
SPACER  
The tool, part number 670251 can also be used for  
installation of the needle bearings for the input shaft.  
The inside needle bearings are installed .135" -.150"  
(
3.43-3.81 mm) below flush. The top bearing is installed  
flush to the casting.  
1
. Use an EP bearing grease and apply it to the  
bearings in the cover. Place the seal into the cover  
with the grooved side of the seal visible and facing  
the installer. Place the snap ring and thrust washer  
on the input shaft and slide the shaft through the  
cover and seal. Place the square cut o-ring, thrust  
washer and input bevel gear on the shaft on the  
inboard side and secure them by placing a snap  
ring in the snap ring groove.  
THRUST WASHERS  
9
. To disassemble the output shaft, remove the bushing,  
thrust washer, large output spur gear, spacer, small  
output spur gear, thrust washer, and bushing.  
SNAP RING  
INPUT  
NEEDLE BEARING  
SHAFT  
FLUSH WITH  
HOUSING  
RETAINING RING  
NEUTRAL COLLAR  
WASHER  
OIL SEAL  
RECESS IN KEY COLLAR  
SPUR GEAR SPLINE  
NEEDLE  
BEARINGS  
.
.
135" (3.43 mm)  
150" (3.81 mm)  
BEVEL GEAR  
2. Next assemble the shifter brake shaft by placing  
the shift keys in the keyway on the shaft with the  
tip of the keys facing the shifter spur gear side of  
the shaft. Extend the collar end of the key slightly  
beyond the shaft. Place the shift collar in the notch  
provided on the shift key with the inside diameter  
recess on the collar facing toward the tips of the  
keys. Place the notch from the second key on the  
inside diameter of the shift collar and position the  
key in the slot on the shifter/brake shaft. Slide the  
keys and the collar onto the shaft under the snap  
ring. Place the snap ring back into the groove on  
the shaft.  
THRUST  
WASHER  
RETAINING RING  
1
0. The input shaft can also be removed and inspected  
or serviced. Remove the snap ring and thrust washer  
on the input shaft, pull the shaft through the cover.  
The oil seal located on the inboard side of the cover  
should be replaced when reassembled. Be sure to  
reinstall the upper and lower thrust washers. Tool  
part number 670251 is used for removal of needle  
bearings for the input shaft.  
SEAL  
BUSHING  
1
1. After clean up of all parts, a complete inspection  
SHIFTER WASHERS  
should be done. Check for chipping or damage to  
the gear teeth, keys or the four key slots in the  
shifter gears. You also should inspect the two  
keyways in the shifter shaft for damage, or chipping.  
Worn or damaged parts must be replaced.  
THRUST WASHER  
THRUST WASHER  
SPUR GEAR  
SNAP RING  
NOTE: INSIDE RECESS FACES KEYS  
3
. Place the plain large thrust washer over the key  
tips on the spur gear side of the shaft next to the  
snap ring. The sequence that follows is reverse  
gear, the neutral collar, then 1st thru the number  
of gears the unit contains (largest to smallest).  
Between each gear place a shift washer with the  
chamfered I.D. facing the shift key (opposite the  
brakeshaft).  
68  
on the splined shaft with the bevel facing the reverse  
drive gear. A retaining ring is put on the shaft next  
to the spur gear between the splined sections to  
prevent the bevel gears from spreading.  
The countershaft is then completed by placing the  
remaining spur gears on the shaft (smallest to  
largest). If the spacers are used they will be placed  
between the final spur gear and the thrust washer  
with the bushing to follow.  
NOTE  
The spur gears on the countershaft can be installed  
in either direction.  
SPACER  
SHIFTING WASHER  
OLD STYLE  
NEW STYLE  
NOTE  
Reverse and first gear do not have a shift washer; the  
neutral collar compresses the key here. Shift washers  
have one side where the inside diameter is rounded,  
this rounded edge must face the shift keys. The shifter  
spur gears no longer have a recess on one side and  
do not require that they be positioned in any particular  
direction. Units that have less than six speeds will  
use a spacer in place of a gear. When this occurs it  
is not required to have a shift washer between the  
spacer and the preceding gear.  
THRUST WASHERS  
5
. The output shaft is completely splined and consists  
of a bronze bushing, thrust washer, a large output  
gear, spacer, small output gear, thrust washer and  
bronze bushing.  
When the final spur gear or spacer is in place, a  
thrust washer is positioned on the shaft to protect  
the case from the rotating gear. This washer is  
slightly larger then the diameter of the spacer and  
large enough to cover the inside diameter of the  
key slot portion of the shifter spur gear. Next place  
the bronze bushing and the oil seal on the shaft  
DIFFERENTIAL  
ASSEMBLY  
(
the open side of the seal must face inward). This  
completes the spur gear side of the shifter brake  
shaft. The output side only requires the output spur  
gear, washer and bushing.  
RETAINING CLIP  
6
. To reassemble the differential, first inspect the axle  
bevel gears for damage or wear. If it is necessary  
to replace a gear, the mating gears must also be  
replaced.  
The differential must be assembled outside of the  
case and placed into the case as an assembly.  
Using seal protector (part # 670262) place a new  
seal on each shaft with the open side facing inward.  
Hold the longest shaft with the bevel gear and washer  
in your hand between the ring and middle finger.  
Place the bull gear and the bevel pinion gears and  
shaft on top of the axle shaft and bevel gear. Center  
the pinion gear shaft on the axle shaft and place  
the short axle so it is also centered on the pinion  
shaft.  
REVERSE FOR "B" INPUT  
4
. To assemble the countershaft, place the reverse  
input bevel gear on the unsplined end of the shaft.  
Follow with a washer and a bronze bushing to  
complete the reverse drive side of the countershaft.  
The forward drive side requires the forward input  
bevel gear and the smallest spur gear to be placed  
69  
1
0. Place a coating of grease on the shaft for easy  
assembly and corrosion protection. Replace the  
"
O" ring if needed. With the cover in position over  
the shaft, place it onto the case and rotate the  
input shaft to allow the gears to mesh, and drop  
the cover into place.  
SEAL LOCATION  
1
1. Install the cover screws and torque them to 90-  
7
. Pick up the entire assembly and place it into the  
case, positioning the seals in the seal pockets.  
When properly installed, the axle shaft should turn  
freely without any binding.  
1
00 inch pounds (10-11.3 Nm). Replace the detent  
ball, spring and set screw. Turn the set screw down  
to the flush position. Install the neutral start sensing  
switch if applicable.  
NOTE  
Before closing the case make sure the case and cover  
fit together evenly. Insure the bushings are properly  
positioned with the flat sides of the bushings matching  
the pockets of the case and cover.  
LOCTITE BEAD AROUND  
OLD STYLE" SEALS  
SEALANT AROUND TWO BOLTS  
FROM BOTTOM OF CASE  
"
ALLEN HEAD SET  
SCREW  
SPRING  
DETENT BALL  
NOTE: Detent screw must have pipe thread sealant applied to  
prevent oil leakage.  
NOTE  
Do not forget to re-install the two bottom bolts.  
1
2. Prior to installing the brake assembly, apply a light  
film of lubriplate to the inside of the lever portion  
which contacts the pins, the outside lever which  
contacts the flat washer, and between the shaft  
O.D. and bore of the brake disc. Brake pads and  
the brake disc must be free of grease and oil. Install  
the brake assembly.  
NEW "RIBBED" STYLE SEALS DON'T NEED SEALANT  
Avoid blocking oil passages  
leading to axle shafts when  
WARNING  
applying a silicone bead to case as shown. Failure  
to do so may result in oil leaks and could result  
in death or serious injury.  
OIL FILL/DRAIN HOLE  
8
. To seal the case and cover, clean the mating surfaces  
and place a continuous thin bead (1/16" / 1.5 mm)  
of Loctite 598 Silicone RTV (part # 788093A) around  
the entire perimeter of the cover to prevent an oil  
leak. Don't forget the two bottom bolts.  
NOTE  
The axle and brake shaft seals on later production  
MST's have been redesigned to eliminate the need  
for sealant in the seal/bearing pocket area. These  
new seals are identified by external ribs that hold the  
seal in place and prevent leakage. DO NOT put sealant  
in the seal/bearing pockets with this new type of seal.  
13. Refill the transaxle through the fill hole located in  
the cover. This unit requires 16 oz. (473 ml) of 80W90  
gear lube (part #730229B). When completed,  
lubricate the plug lightly on the outside with oil.  
Use a 3/16" (4.7 mm) wood dowel placed in the  
plug recess to push it into the plug hole.  
"O" RING  
1
4. Install the transaxle on the equipment. Make any  
clutch and brake adjustments in accordance with  
the equipment manufacturers owners manual.  
Follow recommended guidelines  
in equipment manufacturer's  
WARNING  
manual for correct brake adjustment. Failure to  
do so could result in excessive brake pad wear  
and brake failure which could result in equipment  
damage, death or serious injury.  
9
. Before placing the cover on the case, place the  
shift rod and fork pins into the shift collar and the  
shaft into its' boss in the case. Inspect the shaft  
on the rod and fork for rust and burrs.  
70  
CHECKING OIL LEVEL  
PROCEDURE:  
6. If oil is needed, we recommend using a 16 ounce  
473 ml) goose neck mechanics oil can. (These  
(
1. Place the tractor on a level surface.  
are readily available at any hardware store.) Fill  
the unit with all 16 ounces (473 ml) of 90 wt.  
gear oil to the level indicated.  
2
. Depress the clutch/brake pedal, engage parking  
brake and place the deck in lowest cutting position.  
7
. Reinstall the plug by lubricating it with a silicon  
spray lubricant. An installation tool can be made  
by using one of the following procedures.  
3
. Locate the rubber fill plug next to the shift rod as it  
enters the transaxle cover.  
6
" (152 mm)  
FILL PLUG  
2
0" (508 mm)  
ROUNDED END  
3"  
76 mm)  
(
FILL PLUG PUSHER TOOL  
/16" (4.76 mm) ROD  
3
4
. Work a needle nose pliers under the lip of the plug,  
rocking from side to side until plug is removed.  
Use care to not damage the rubber plug.  
8. When the plug is accessible from the battery box  
area, make an installation tool from 3/16" (4.76  
mm) cold rolled steel rod as shown.  
DIPSTICK  
NO. 35942  
LARGE FENDER  
WASHER  
1
/2" (12.7 mm) CONTACT IS FULL  
o
5
4
STD. NO. 10 NUT  
NO. 10 SCREW BOLT  
" (50 mm) LONG  
2
9
. If working from the bottom or side, use a No. 10  
bolt screw approximately 2 inches (50 mm) long  
with full threads. Then find a large fender washer  
and nut for the screw. The washer will give your  
fingers a large surface area to push down on for  
reinstallation of the plug. The blunt end of a TORX  
5
. Insert the dipstick gauge at a 45° angle (Part Number  
5942). Check for approximately 1/2 inch (12.7  
mm) of oil when fully inserted. This is 16 ounces  
473 ml) of EP90 gear oil.  
3
(
3
0 bit works well also.  
71  
CHAPTER 12. 1200 SERIES THREE-SPEED TRANSAXLES  
H-SHIFT PATTERN  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
DISASSEMBLY  
WARNING  
1. Position the shifter forks in neutral.  
2
. When disassembling the unit, it should be held so  
it lies on the case, and properly blocked so no  
weight rests on the input shaft or differential, but  
keeping the case rigid.  
When shifting gears verify the  
WARNING  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
The unit also needs to be held in a vice in such a  
way that it can be worked on without the chance  
of falling, or causing injury.  
DO NOT shift on a hill or when  
WARNING  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
3
. Oil seals have a double lip so seal sleeves do not  
offer much protection during removal. Upon  
reassembly new seals should be used.  
Use approved safety procedures  
WARNING  
4. Tap dowel pins into the case and remove socket  
head cap screws.  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
OUTPUT GEAR  
AXLE  
CASE  
We caution you against the use  
WARNING  
of aftermarket variations of braking  
systems, adjustments and service of these  
components. Removing or altering factory installed  
parts my affect performance and could result in  
death or serious injury.  
THRUST  
WASHER  
Servicing the braking system will void your  
warranty. See your Authorized Tecumseh  
Servicing Dealer.  
SPACER  
GENERAL  
5. Lift the cover off of the case. Discard the gasket.  
Remove output gear and shaft.  
1
. The 1200 series transaxle has three forward speeds  
and one reverse.  
SHIFTING ASSEMBLY  
AXLE SUPPORT TO CASE/COVER  
SEAL  
AXLE  
HOUSING  
BUSHINGS  
PRESS FIT  
2
. This series is not intended for use with ground  
engaging equipment. That is, it should not be used  
to pull plows, tillers or similar equipment. Care is  
to be used and common sense is expected in any  
situation where a severe strain will be placed on  
the axles.  
6. Remove the shifting assembly as one unit.  
1
200Housing, BushingandSealAssy.  
On the 1200 series, replace the seals after complete  
reassembly.  
72  
INSPECTION AND REPAIR  
REVERSE IDLER  
GEAR SHAFT AND  
SPACER  
Inspection of the case and cover on the 1200 series  
may indicate the need for replacement of the axle  
housings. Use an arbor press to drive out the housing,  
and a protective piece of bar stock between the housing  
and press when replacing the housing. Press the housing  
in squarely until the flange seats against the case  
and cover.  
ASSEMBLY  
1
. Install the input shaft in the case. Use a soft mallet  
to seat the shaft and gear completely. Binding can  
occur if the shaft is driven in only part way.  
INPUT SHAFT  
AND GEAR  
2
. Install the differential assembly. The four cap screw  
heads should face away from the output gear or  
downward.  
7. Remove the reverse idler shaft, spacer and gear.  
GEAR CLUSTER  
ASSEMBLY  
BEVEL EDGE  
DOWN  
SPACER  
BEVEL EDGE OF  
TOOTH TOWARD  
LARGE GEAR  
8. Lift out the three gear cluster.  
INPUT SHAFT  
AND GEAR  
3
. Install the three gear cluster, with the smallest gear  
facing up.  
INPUT SHAFT  
DIFFERENTIAL  
NOTE  
CHAMFER  
TOWARD  
BEARING  
Bevels of the small and middle gears go down toward  
the large gear with the large gear bevel facing up. The  
short spacer goes between the large and middle gears.  
REVERSE IDLER  
GEAR SHAFT AND  
SPACER  
OUTSIDE END  
OF INPUT  
SHAFT  
9. Remove the input shaft, then the differential.  
NOTE  
Note what the relationship of the bolt heads are prior  
to removal of the assembly.  
INPUT SHAFT  
AND GEAR  
4
. Position the reverse idler shaft in the unit; then  
install the gear and spacer.  
73  
LUBRICATION  
Use S.A.E. 90 E.P. oil in the transaxle.  
Fill units 1203, 1204, 1204-A, and 1205 thru 1208 with  
3
pints (1420 ml) of oil. All other units, fill with 2 pints  
(
946 ml)of oil.  
SQUEEZE TOP  
OF SHIFT  
RODS  
5
. Install the shifter assembly as a unit into the case.  
When installed correctly, the neutral square formed  
by the shifting forks should appear through the case  
opening for attaching the shift housing. Both shift  
gears should be out of mesh.  
OUTPUT GEAR  
AXLE  
CASE  
THRUST WASHER  
SPACER  
6.  
7.  
8.  
Install the output shaft, gear, spacer and thrust  
washer.  
Position a new gasket on the cover mounting  
surface; then install the cover.  
Align the cover with the dowel pin and secure with  
the socket head cap screw. Torque to 10 ft. lbs.  
(
13.6 Nm).  
9.  
Install the axle seals using a sleeve and driver.  
1
0. Install the axle supports. Be sure the mounting  
pad position is correct before tightening down the  
cap screws to 13 ft. lbs. (17.7 Nm).  
1
1. Install a new gasket and shift lever housing. Torque  
screws to 10 ft. lbs. (13.5 Nm). Be sure the shift  
lever is in the proper position to allow shifting.  
74  
CHAPTER 13. HYDROSTATIC GEAR REDUCTION DIFFERENTIALS  
1
300 SERIES  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
WARNING  
EQUIPMENT  
MOUNTING  
HOLES  
COVER  
BRAKE  
SHAFT  
Use approved safety procedures  
WARNING  
OIL  
LEVEL  
PLUG  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
AXLE  
SUPPORT  
CASE  
AXLE  
DOWEL  
GASKET  
2
. Axle supports, pressed from the inside out, must  
be removed from the case and cover, similar to the  
method used in the 1200 series transaxle.  
GENERAL  
The 1300 series unit, is driven by a hydrostatic pump  
connected to the units case. The transmission function  
is accomplished by the hydrostatic controls.The  
Tecumseh/Peerless unit, therefore, only reduces input  
shaft speed to the differential and axle assembly.  
REMOVE MOUNTING  
SCREWS (4)  
INPUT  
1
2
3
4
4
2
6
7
9
4
HYDROSTATIC UNIT  
5
1
8
3
. To separate the hydrostatic unit from the 1300,  
support both parts, then remove the four mounting  
screws, and separate the parts. Drain the oil from  
the 1300 unit. Any hydrostatic repair must be done  
through the equipment brand dealer.  
10  
14  
1
3
11  
12  
Legend for the 1300  
1
2
3
4
5
6
7
- Oil Seal  
8 - Axle  
- Thrust Washer  
- Brakeshaft  
- Needle Bearing  
- Output Gear  
- Output Shaft  
- Spacer  
9 - Axle Support  
10 - Bushing  
11 - Cover  
INPUT GEAR (DRIVEN)  
12 - Differential Gear  
13 - Case  
14 - Thrust Washer  
DISASSEMBLY  
1
. Clean the exterior surfaces. Drain lubricant; then  
separate the gear reduction from the hydrostatic  
unit. Check axle shafts for rough edges and high  
spots. Due to the hardness of the shafts, a stone  
may be necessary to remove metal burrs. Check  
for any evidence of oil leakage at the gasket or  
bearing surfaces.  
HYDROSTATIC UNIT  
MOUNTING HOLES  
4
. After removing the hydrostatic unit, inspect the  
surfaces and the gears from outside the unit.  
75  
REASSEMBLY  
5
. Remove the lockscrews and tap the dowel pins  
out of the cover. Lift off the cover and discard the  
gasket.  
1
. When installing axle supports, be sure the case  
and cover alignment is true with the press. Press  
supports in until the flanged surfaces contact the  
case and cover.  
6. Lift out the brake shaft, gear, and thrust washers  
on each side of the gears.  
7
. Lift the output shaft, gear, spacer, and thrust washer  
from the case. At the same time, lift out the differential  
assembly.  
2
. Install the differential and output shaft  
simultaneously. Position the 3/4'’ (19.1 mm) I.D.  
gear spacer and thrust washer on the shaft.  
NOTE  
3
. Center one 3/4'’ (19.1 mm) I.D. thrust washer over  
the case needle bearings then install the brakeshaft  
gear, and another 1-1/8'’ (28.6 mm) I.D. thrust  
washer.  
No thrust washer is located between the output shaft  
and the case.  
8
9
1
. To service the differential, refer to Chapter 18 on  
differentials.  
4. Position a new gasket on the mounting surface of  
the case, then install the cover. Align the cover  
and case by tapping dowel pins into the cover  
and secure with lockscrews torqued to 10 ft. lbs.  
. To service bearings, refer to Chapter 22 on bearing  
service.  
(
13.6 mm).  
0. To separate axle supports from the case and cover,  
use an arbor or hydraulic press. A piece of bar  
stock should be used to protect the support from  
the ram of the press that you are using.  
5
6
7
. Install a new brakeshaft oil seal and axle using  
seal protector.  
. Install new axle support oil seals using a seal  
protector.  
INSPECTION AND REPAIR  
1
. Inspect the case and cover for cracks, stripped  
threads, marred sealing surfaces, and bearing  
condition. The cause of any oil leakage should be  
corrected and if parts cannot be repaired, replace  
them.  
. Add 2-3/4 pints (44 oz.) (1301 ml) Oil (S.A.E. EP  
9
1
0) before securing the hydrostatic drive to the  
300 series unit. Clean the mounting surfaces and  
use a new gasket between the units. Torque the  
four mounting bolts to 90-100 inch pounds (10.2-  
11.3 Nm).  
2
. Check shafts and gears for worn or chipped teeth.  
Check bearing surfaces for scratches which might  
affect oil seal performance. Check for wear.  
3
. Check needle bearings and be sure the bearings  
are not corroded or rusty. Replace bearings if in a  
questionable condition. Check the quality of the  
seal around the needle bearings.  
4
. Check differential for rigidity. Wobble indicates wear.  
Refer to the Chapter on differentials for service.  
76  
1300 SERIES HYDROSTATIC GEAR REDUCTION  
DIFFERENTIAL  
Oil Bath  
S.A.E. E.P. 90 oil  
Part No. 730229B  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
77  
CHAPTER 14. 2300 SERIES FOUR-SPEED TRANSAXLES  
H-SHIFT PATTERN  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
WARNING  
INTERNAL QUAD  
RING SEAL USED  
AT THIS POINT  
ROLL OR  
DOWEL PIN  
When shifting gears verify the  
WARNING  
3 SOCKET HEAD Cap  
screws (TORQUE TO 10  
FT. LBS. [13.6 Nm])  
clutch is operated. Failure to do  
so may cause premature transmission failure which  
could result in death or serious injury.  
GASKET  
DO NOT shift on a hill or when  
WARNING  
INPUT  
SHAFT  
carrying a heavy load. Shifting on  
a hill may cause premature transmission failure  
which could result in death or serious injury.  
DISASSEMBLY  
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
CASE  
We caution you against the use  
WARNING  
of aftermarket variations of braking  
systems, adjustments and service of these  
components. Removing or altering factory installed  
parts my affect performance and could result in  
death or serious injury.  
SHIFTING  
FORKS IN  
NEUTRAL  
COVER  
Servicing the braking system will void your  
warranty. See your Authorized Tecumseh  
Servicing Dealer.  
1
. Position the shifter forks in neutral before  
disassembly.  
GENERAL  
SCRIBE MARK  
IF NECESSARY)  
AXLE HOUSING  
The 2300 series transaxle is a four speed forward with  
one speed reverse transaxle.  
(
BRAKE SHAFT  
MOUNTING BOLTS  
COVER  
SHIFT LEVER  
AXLE  
SHIFT LEVER  
HOUSING  
INPUT SHAFT  
CASE  
AXLE  
HOUSING  
I.D. TAG  
2
3
. Remove both axle housings, and use the exposed  
axle as a ram to separate the seal retainers from  
the case and cover.  
MOUNTING PADS  
. When disassembling the rest of the unit, it should  
be held so that it lies on the cover, properly blocked  
up, so that no weight rests on the brake shaft. The  
cover should sit rigidly so that the removal of parts  
can be done in a systematic step by step procedure.  
Be sure it does not fall causing injury.  
78  
4
. Oil seals are of the double lip type so sleeve  
protectors do not offer much protection when  
removing them. Upon replacement, new seals should  
be used.  
AXLE  
INPUT SHAFT  
BE SURE SEAL  
IS REMOVED  
1/32" (.794 mm)  
THRUST WASHER  
CASE  
BRAKE SHAFT  
3-GEAR CLUSTER  
COVER  
(8)  
SOCKET  
HEAD CAP  
SCREWS  
7
. Remove thrust washer and three gear cluster from  
the brake shaft, noting whether the cluster has a  
sloppy fit.  
DOWEL PIN  
5
. Tap dowel pins into the cover and remove the socket  
NOTE  
head cap screws.  
To service the cluster bushings, refer to Chapter 22  
on bearing and bushing service.  
AXLE  
8
. Inspect gear teeth for wearing, chipping or breaks.  
Wear or chipping on the bevel area only, indicates  
shifting while the equipment is in motion.  
INPUT SHAFT  
CASE  
0
4
-1/2" TO 2"  
5
1
(
TURN CW  
COVER  
38 - 50.8 mm)  
6
. To separate the case from the cover. Lift the case  
1
-1/2 to 2'’ (38-50.8 mm) above the cover. Tilt the  
case so that the shift rods will clear the edge. Rotate  
the case so the boss hidden inside will clear the  
gears, then lift it free of the differential.  
REVERSE IDLER GEAR AND SHAFT  
9
. Remove the reverse idler gear, spacer and shaft  
from the boss in the cover. Note that the spacer  
goes between the gear and the cover, and the gear  
bevels go down. Excessive wear on teeth bevels  
indicates improper shifting technique.  
79  
1/32" (.794 mm) THICK 1" (19 mm)  
I.D. THRUST WASHER IDLER GEAR  
SHIFTING  
ASSEMBLY  
SPUR GEAR  
LOW GEAR SPUR  
BRAKE SHAFT  
IDLER GEAR CHAMFERED SIDE  
UP, AWAY FROM BEARING  
1
0. Lift out the shifter assembly. Service of this unit is  
described in Chapter 21 on shifting assemblies. If  
it is evident that the shifter assembly needs no  
further teardown, place it aside intact in a clean  
place for servicing at a later time.  
1
5. Remove the brake shaft.  
NOTE  
The brake shaft idler separates from the shaft. If  
separated, be sure that when reassembled, the idler  
gear chamfers are away from the cover.  
1
1. Remove the low gear and shaft, and splined spur  
gear. Separate the gear and shaft. Note there is  
no thrust washer between the gear and case.  
FOUR HEX BOLTS  
HEADS UP  
LOW GEAR  
SHAFT BEARING  
OUTPUT GEAR  
AND SHAFT  
DIFFERENTIAL  
CARRIER  
BEARING  
BRAKE SHAFT BEARING  
1/32" (.794 mm) THICK  
LOW GEAR SHAFT  
BEARING  
3
/4" (19 mm) I.D.  
THRUST  
WASHER  
BETWEEN  
GEAR AND  
BEARING  
AXLE AND  
DIFFERENTIAL  
ASSEMBLY  
SPACER  
-GEAR CLUSTER  
OUTPUT SHAFT  
BEARING  
2
BRAKE SHAFT  
INPUT SHAFT AND GEAR  
FLAT SIDE OF GEAR UP)  
SHIFT LEVER OPENING  
SHIFTER ROD SOCKETS  
12. Remove the two gear cluster and spacer from the  
brake shaft.  
(
1
3. Lift the differential unit out of the cover.  
*OUTPUT SHAFT  
BEARING  
*
SHIFTER SHAFT BEARING  
NOTE  
SHIFTER ROD SOCKETS  
Service information appears in Chapter 18 on  
differentials.  
1
/16" (1.58 mm) THICK  
5/16" (23.8 mm) I.D.  
1
THRUST WASHER  
*BRAKE SHAFT BEARING  
REVERSE  
IDLER  
SHAFT  
LOW GEAR  
SHAFT BEARING  
MAGNETIC  
DRAIN PLUG  
BOSS  
DIFFERENTIAL  
AND AXLE  
ASSEMBLY  
REMOVED  
*BEARING TO BE .015" - .020" (.381-.508 mm)  
BELOW THRUST SURFACE  
OUTPUT GEAR  
AND SHAFT  
16. Remove the input shaft from the case by tapping  
with a non-metallic hammer.  
1
4. Remove the output shaft and gear and thrust washer  
from each end of the shaft.  
80  
INSPECTION AND REPAIR  
ASSEMBLY  
1
/32" (.794mm) THICK  
1
. Gears.  
BRAKE SHAFT BEARING  
LOW GEAR SHAFT BEARING  
3/4" (19mm) I.D.  
THRUST WASHER  
BETWEEN GEAR AND  
BEARING  
a. Check bevels for evidence of damage due to  
improper shifting.  
DIFFERENTIAL  
CARRIER  
BEARING  
NOTE  
Input power to Tecumseh/Peerless Transaxles must  
be stopped before shifting.  
b. Check face of teeth for wear. Large shiny areas  
indicate too much tooth contact and possible  
excessive wear. Replace gears that are damaged  
or show excessive wear.  
LOW GEAR  
SHAFT  
BEARING  
2
. Shafts and Axles.  
INPUT SHAFT AND  
GEAR (FLAT SIDE  
OF GEAR UP)  
SHIFTER ROD  
SOCKETS  
a. Check surfaces for rust, pitting, scratches or  
wear.  
SHIFT LEVER  
OPENING  
b. Check keyways, splines, threads, and grooves  
for wear. Replace parts if worn or damaged beyond  
a refinished state.  
1. Install the input shaft in the case. Use a soft mallet  
to seat the shaft and gear completely. Often, binding  
in the assembled unit can be traced to a partially  
installed input shaft.  
3
. Case and Cover.  
1
/32" (.794 mm) THICK, 1" (25.4 mm)  
Check for cracks, stripped threads, metal chips,  
flat sealing surfaces and rust. Clean out any rust.  
Replace parts if any damage is found that cannot  
be repaired.  
I.D. THRUST WASHER UNDER IDLER  
GEAR  
4. Thrust Washers and Spacers.  
Check for shiny surfaces which indicate wear and  
replace if evident. Try to determine the cause of  
thrust washer wear such as lack of end play due to  
the reuse of an old gasket, or use of the wrong  
thrust washer.  
5
6
7
. Shifting Assembly.  
Refer to Chapter 21on shifting assemblies.  
. Gaskets.  
BRAKE SHAFT  
IDLER GEAR CHAMFERED SIDE UP,  
AWAY FROM BEARING  
2
. Center one 1/32'’ (794 mm) thick by 1'’ (25.4 mm)  
I.D. thrust washer on the cover brake shaft needle  
bearing, then install the brake shaft and gear, (with  
the chamfer side away from the cover).  
Replace all gaskets.  
. Oil Seals.  
It is a good habit to replace all seals. It is necessary  
to replace all double lip seals. See Chapter 1, for  
the paragraph on “OIL LEAKS, SEAL AND GASKET  
SERVICE”.  
1/16" (1.59 mm) THICK, 15/16" (23.8 mm) I.D.  
THRUST WASHER  
8. Bearings and Bushings.  
Refer to Chapter 22 on bearings and bushings.  
OUTPUT SHAFT  
AND GEAR  
OUTPUT SHAFT BEARING  
3
. Install the output shaft and gear after centering a  
/16" (1.59) thick by 15/16" (23.8 mm) I.D. thrust  
washer on each end of the shaft.  
1
81  
AXLE AND  
DIFFERENTIAL OUTPUT GEAR  
FOUR HEX  
BOLTS HEADS  
UP  
ASSEMBLY  
AND SHAFT  
BEVELED EDGE  
LOW GEAR  
SHAFT  
BEARING  
SPACER  
2-GEAR CLUSTER  
9
. Install the reverse idler shaft, spacer and gear into  
the cover. The beveled side of the idler gear should  
be down into the cover.  
BRAKE SHAFT  
4
. Insert the differential assembly into the cover. Note  
that the four bolt heads should be facing away from  
the output gear.  
BRAKE SHAFT  
5. Install the two gear cluster and spacer on the brake  
shaft.  
1/32" (.794 mm) THICK,  
7/8" (19 mm) I.D. THRUST  
WASHER IN PLACE ON  
BEARING  
REVERSE  
IDLER  
SHAFT  
SQUEEZE SHIFTER  
RODS TO HOLD  
SHIFTER ASSEMBLY  
TOGETHER  
1/32" (.794 mm)  
THRUST WASHER  
3-GEAR CLUSTER  
TWO GEAR  
CLUSTER  
AND SPACER  
1
0. With the small gear of the three gear cluster toward  
the spacer, install the three gear cluster and another  
1
/32'’ (.794 mm) thick by 7/8'’ (19 mm) I.D. thrust  
washer on the brake shaft.  
AXLE  
INPUT SHAFT  
CASE  
LOW GEAR  
SHAFT  
(
B)  
SPUR GEAR  
0
5
4
TURN CW  
1-1/2" to 2"  
38-51 mm)  
(
6
. Install a 1/16'’ (1.59 mm) thick by 3/4'’ (19 mm)  
I.D. thrust washer, gear and low gear idler shaft in  
the cover. Do not put a thrust washer on the exposed  
end of this shaft. Be sure the small gear meshes  
with the larger gear of the two gear cluster.  
COVER  
7. Center one 1/32'’ (.794 mm) thick by 7/8'’ (19 mm)  
I.D. thrust washer on cover shifter shaft bearing.  
1
1. Position the gasket on the cover sealing surface,  
then install the case over the differential shaft. Be  
sure the boss goes under the gears and the edge  
of the case goes over the shaft rods in the opposite  
manner from which it was removed.  
8. Install the shifter assembly (as a unit) into the cover.  
82  
1
2. Once in position, if the case hangs up 1/2" to 1'’  
16. Upon installation of the axle housing, be sure  
mounting pads face in the same direction as when  
removed. Install cap screws and torque to 13 ft.  
lbs.(17.6 Nm).  
(
12.7 - 25.4 mm) above the cover, turn the input  
shaft to get the gears to mesh. The case should  
drop to about 1/4'’ (6.3 mm) from closing.  
17. Install the shift lever housing and new gasket.  
CASE  
INTERNAL QUAD  
RING SEAL USED  
AT THIS POINT  
ROLL OR  
DOWEL PIN  
3 SOCKET HEAD CAP  
SCREWS (TORQUE TO  
SHIFTING  
FORKS IN  
10 FT. LBS. [13.6 Nm])  
NEUTRAL  
COVER  
INPUT  
SHAFT  
GASKET  
1
3. Use a pair of needle nose pliers on the shifter stop  
on each shifter fork to agitate the shifter rod ends  
into their machined recesses in the case.  
TESTING AND LUBRICATION  
. For testing, refer to Chapter 1, page 6.  
1
4. Align the case and cover with the two dowel pins,  
then install and tighten the eight socket head cap  
screws. Torque screws to 10 ft. lbs. Unit can now  
be placed flat on the work bench.  
1
2. For proper lubrication type and amount, refer to  
Chapter 1.  
NOTE  
Seal protectors must be used, when installing a seal  
over the axle ends or any shaft with a machined keyway.  
OIL SEAL PROTECTOR  
(USE DURING ASSEMBLY)  
AXLE  
OIL SEAL  
BRAKE SHAFT  
OIL SEAL  
RETAINER  
"O" RING  
THRUST BEARING ASSEMBLY  
1
5. Install new “O” rings and oil seals using the seal  
protector as shown.  
NOTE  
Coating both the "O" ring and seal with lubricant will  
help ease assembly.  
83  
2300 SERIES TRANSAXLES  
LUBRICATION  
Oil Bath  
4 oz. (1892 ml) S.A.E. E.P. 90 oil  
6
to be filled through shift lever opening  
Part No. 730229B  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
84  
CHAPTER 15. 2400 SERIES HYDRO POWERED TRANSAXLES  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
3. After the coupling is installed over the driveshaft of  
the hydrostatic pump press the parts together.  
Secure the assembly with three socket head cap  
screws, torqued to the standard for the bolt being  
used.  
WARNING  
Use approved safety procedures  
VEHICLE MOUNTING HOLES  
HYDROSTATIC UNIT  
MOUNTING HOLES  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
COVER  
BRAKE SHAFT  
(RIGHT SIDE HERE)  
INPUT SHAFT  
(LEFT SIDE HERE)  
AXLE SUPPORT  
RETAINING BOLTS  
The 2400 Series transaxle is a gear reduction unit  
which is powered by a hydrostatic pump.  
LONG AXLE SUPPORT  
CASE  
SEPARATING AND COMBINING THE HYDROSTATIC  
PUMP AND THE 2400 SERIES TRANSAXLE.  
SHORT AXLE  
SUPPORT  
HYDROSTATIC UNIT  
MOUNTING HOLE  
The two parts, gear reduction unit and pump, should  
be removed from the vehicle together.  
PRIOR TO REMOVAL, NOTE POSITION OF MOUNTING PAD IN RELATION TO  
UNIT. (ALSO NOTE SIDE TO WHICH SHORT SUPPORT AND LONG SUPPORT  
ATTACH).  
DISASSEMBLY  
4. Clean axles of burrs, rust and sharp edges.  
5. Remove axle supports. Be sure to note in what  
position and to which side they attach.  
6. Drain the oil from unit. Remove the seal retainers  
and “O” rings.  
7
. Remove the eight socket head cap screws securing  
the case to the cover. Drive dowel pins out of case  
into cover, then lift case off of the cover.  
MOUNTING SCREWS (3)  
1
. To separate the units, block the assembly in a  
protective vise, then remove the three hydrostatic  
mounting screws. Separate one unit from the other.  
If any binding occurs, remember that the drive shafts  
are held in common rotation by a splined coupling  
which will bind if the relationship between the input  
shaft and the pump is not straight.  
DIFFERENTIAL UNIT  
(NOTE POSITION OF  
CAP SCREW HEAD.  
REASSEMBLE IN  
COVER SAME WAY).  
DIFFERENTIAL DRIVE  
PINION AND GEAR  
(OUTPUT)  
COAT INSIDE OF COLLAR  
WITH E.P. LITHIUM GREASE  
MOUNTING SCREWS (3)  
DOWEL PIN  
COVER  
INPUT  
SHAFT  
DRAIN PLUG  
BRAKE SHAFT  
AND GEAR  
NOTE  
FILL LEVEL PLUG  
For service to the hydrostatic pump, it must be returned  
to the dealer who sold the vehicle for his service  
arrangement.  
DOWEL PIN  
8. Before removing the differential unit, note the position  
of the cap screw heads. Replace the unit in the  
same way to insure axle lengths will be correct  
when installing the axle supports.  
2
. To combine the hydrostatic pump and the 2400  
transaxle, coat the splined coupling with E.P. Lithium  
grease, and install it on the 2400 input driveshaft.  
85  
OUTPUT PINION,  
GEAR AND  
THRUST  
INPUT SHAFT, GEAR AND  
THRUST WASHERS  
OUTPUT SHAFT  
BRAKE SHAFT  
WASHERS  
BRAKE SHAFT  
GEAR, SHAFT  
AND THRUST  
WASHERS  
SPACER  
INPUT SHAFT  
COVER  
9. Remove the input shaft and gear assembly. Note  
that thrust washers are on both ends of the shaft.  
1
0. Remove the output pinion and the gear splined to  
it. Note the position of thrust washers on each  
end of the pinion.  
1
1. To remove the brake shaft, the shaft must be tapped  
from the gear splined to it. Use a soft hammer.  
Note that both ends of the shaft have thrust washers.  
INSPECTION AND REPAIR  
1. Clean all parts and examine for wear or damage.  
2
. Refer to Chapter 18 on differentials for service when  
working on differentials. Refer to Chapter 22 on  
bearing and bushing service to replace any loose  
or worn bearings.  
3
. Remove and discard oil seals from the input and  
brake shafts. Check axle seals and replace if any  
evidence of leaking exists. If protective seal sleeves  
were not used when removing seals and retainer  
assemblies, replace seals after assembly. Use seal  
protectors and correct drivers. See the paragraph  
in Chapter 1 “OIL LEAKS, SEAL AND GASKET  
SERVICE” for service.  
4
. Install the differential unit with cap screw facing  
down.  
5. Position a new gasket on slightly raised dowels  
and install the case. Turn down eight (8) socket  
head cap screws lightly. Tap dowel pins in and  
tighten the cap screws to 10 ft. lbs. (13.6 Nm).  
6
. Use a seal protector and install the seal and retainer  
assemblies. Position a new “O” ring on the seal  
retainer. Be sure the mounting pad is in the correct  
position. Install each axle support and bolt down.  
Torque the cap screws to 13 ft. lbs. (13.7 Nm).  
4. Clean the case and cover. Protect the bearings  
from dirt. Lubricate the bearings to prevent rusting.  
ASSEMBLY  
1. Install thrust washer in the cover for input, output  
7. Using the proper seal protector and driver, replace  
the input and brake shaft seals.  
and brake shafts.  
2. Install the brake shaft into the gear in the cover.  
8. Rotate shafts to check for binding or noise.  
3
. Install the input and output shafts (with gear) and  
position spacers on the brake shaft. Install thrust  
washers on all shafts.  
9. Add lubricant (2 pints [946 ml] S.A.E. EP90 oil) to  
level of the fill plug with the unit in normal mounted  
position.  
CASE  
COVER  
THRUST WASHER  
THRUST WASHER  
SPLINED COUPLING  
INPUT  
SEAL  
SEAL  
BRAKE  
THRUST WASHER  
THRUST WASHER  
OUTPUT  
"
O" RING  
NOTE POSITION OF  
AXLE SUPPORT  
SEAL RETAINER  
NOTE POSITION OF CAP  
SCREW HEADS  
SEALED BALL  
BEARING  
NOTE, EQUAL LENGTH  
AXLE EXTENSION FROM  
EACH SUPPORT  
SEAL  
86  
2400 SERIES HYDRO POWERED TRANSAXLES  
LUBRICATION  
Oil Bath  
3
2 oz. (946 ml) S.A.E. E.P.  
Part No. 730229B  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
87  
CHAPTER 16. 2500 SERIES HYDRO POWERED TRANSAXLES  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
3. Clean all exterior surfaces of the transaxle.  
WARNING  
4
. Remove the axle supports. If supports are different  
or if there is a chance for confused reassembly,  
scribe alignment marks.  
Use approved safety procedures  
"O" RING SEAL  
®
TIMKEN THRUST  
ROLLER BEARING  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
GEAR REDUCTION AND DIFFERENTIAL UNIT  
GENERAL  
Most 2500 Series two speed gear boxes are run by  
®
an Eaton Model 10 hydrostatic unit. Power for the  
hydrostat is supplied by an engine with up to an 18  
H.P. rating. The unit has infinite forward and reverse  
speeds in both a high and low range. The 2500 series  
are shipped without lubrication. Original equipment  
manufacturers fill each gear case with lubricant when  
installing the 2500 in the equipment. Lubrication for  
the 2500 is 7 to 8 pts. (3.3 - 3.8 Lt) of SAE Type A  
automatic transmission fluid.  
5. Remove and discard square “O” ring seal.  
6. If the tapered roller bearings are loose, remove them.  
7
. Position the unit with the cover up side; then remove  
the dowels and screws. Lift off the cover and discard  
the gasket.  
AXLE AND  
DIFFERENTIAL  
ASSEMBLY  
WASHERS  
THRUST OR  
TABBED  
OUTPUT SHAFT  
AND GEAR  
DISASSEMBLY  
1. Remove piping and hydrostatic unit as necessary  
to allow repair.  
2
. Although the unit should have been drained of  
lubrication, be aware that removal of the axle support  
will allow trapped oil to spill.  
HIGH  
RANGE  
DRIVEN  
GEAR  
NOTE  
LOW  
RANGE  
DRIVEN  
GEAR  
An oil supply is blocked in the hydrostatic pump when  
not running, so upon reassembly hydrostatic charging  
is not necessary.  
BOLT HEADS AWAY  
FROM LARGE GEAR  
SHIFT ROD  
SNAP RING  
NOTE  
FORK  
LOW RANGE DRIVEN GEAR  
Any attempt to service the hydrostatic pump should  
be done only upon authorization of Eaton or the  
equipment manufacturer. Tecumseh does not authorize  
repair or adjustment of the unit.  
HIGH RANGE DRIVEN GEAR  
8
. To remove the inside components, first remove the  
INPUT DRIVEN BEVEL GEAR  
DOWEL  
differential and then thrust washers.  
AXLE  
SUPPORT  
DOWEL  
88  
Case and Cover  
FORK  
SPRING  
SETSCREW  
1. Check for leaks or cracks.  
2. As necessary, replace needle bearings as described  
in Chapter 10.  
DETENT BALL, SPRING  
AND SETSCREW  
3
. Do not replace brake shaft and shifter rod seals  
SNAP RINGS  
until the unit is reassembled.  
DETENT BALL  
BRAKESHAFT  
HIGH RANGE  
BEVELED SIDE  
OF GEAR TEETH  
BEVELED SIDE OF  
GEAR TEETH  
LOW RANGE  
THRUST SPACER  
SHIFTER AND  
BRAKE SHAFT  
OUTPUT  
PINION  
RETAINING  
RING  
THRUST OR  
TABBED  
WASHER  
SHIFTER  
FORK  
HIGH  
RANGE  
GROOVE  
LOW  
RANGE  
GROOVE  
9
. To remove the shifter rod and fork, the set screw,  
spring and detent ball should be removed from the  
outside of the case.  
SNAP RINGS (2)  
SHIFTER ROD  
NEUTRAL  
GROOVE  
Shafts and Gears  
1. Check teeth for wear, pitting or breakage.  
INPUT  
SHAFT  
THRUST WASHERS  
SPACER  
HIGH RANGE  
TRANSMISSION  
GEAR  
INPUT  
BEVEL  
GEAR  
(Shown  
Assembled)  
2
3
4
. Inspect bearing surfaces for smoothness.  
BEVELED  
ROUNDED)  
SIDES  
(
. Inspect gears and shafts for out-of-round.  
. Splines should allow a smooth fit. Rotate meshing  
parts for a better fit if binding seems excessive.  
THRUST OR  
TABBED  
WASHER  
THRUST  
BEARING  
SPACER  
SHIFTER FORK  
(PARTIALLY REMOVED)  
LOW RANGE TRANSMISSION GEAR  
FORK NORMAL  
POSITION  
HIGH RANGE  
GROOVE  
INPUT  
SHAFT  
1
0. Remove both the input and shifter gear and shaft  
assemblies, along with the shifter rod and fork.  
LOW  
RANGE  
GROOVE  
SNAP RINGS  
(SHARP SIDE OUT)  
11. Remove the input shaft and gear assembly.  
NEUTRAL  
12. Remove the output shaft and gear.  
INSPECTION AND REPAIR  
Shifter Mechanism  
. Check spring for tension and ball for wear.  
Axle Supports  
1
1
. Check ball bearings and bearing races for wear,  
rust and ease of rotation. Clean the interior of the  
support if necessary.  
2. Check shifter rod grooves for wear. Be sure the  
sharp edge of the snap ring goes away from shifter  
fork.  
2
. Replace the oil seals in the axle supports.  
. Check for cracks in the support.  
3. Inspect the shifter fork for straightness and wear.  
3
89  
Differential  
ASSEMBLY  
Install parts reversing the disassembly procedure. Be  
careful of the following:  
SETSCREW  
FORK  
SPRING  
DETENT BALL, SPRING  
DETENT BALL  
AND SETSCREW  
SNAP RINGS  
AXLE AND  
DIFFERENTIAL  
ASSEMBLY  
BRAKESHAFT  
PINION  
RETAINING RING  
CORE BODY  
1
. After the shifter rod is positioned, install the detent  
ball, spring and setscrew. Slowly turn the setscrew  
inward while raising and lowering the rod until the  
detent ball stops the rod movement.  
AXLE  
AXLE  
DRIVE  
GEAR  
2. Be sure that thrust washers and spacers are between  
every shaft and the case and cover.  
LIMITED  
SLIP DIFFERENTIAL  
3
. Threads of the differential bolts must be coated  
with standard stud Loctite. The bolt heads on the  
differential are up when installed.  
1
. Make sure you have all parts are present.  
4
5
6
. Install a new gasket. It may be helpful to dampen  
the gasket with oil to get it to lie flat.  
2. Check the snap rings for their condition.  
. Use a seal protector to protect the axle support oil  
seals during installation.  
THRUST WASHER  
. Install axle supports correctly. Do not rotate the  
support to a new position when pressed tight against  
the square “O” ring seal or the seal may be cut.  
COUNTER RETAINER  
BORE FOR RING  
AXLE  
DRIVE  
AFTER ASSEMBLY  
GEAR  
AXLE  
(SPLINED  
END)  
1
2
3
. To install the brake shaft oil seal using a seal  
protector.  
. To install the shifter rod oil seal, use seal sleeve  
670206 and driver 670211.  
. Lubrication for all models is 7 to 8 pints (3.3 - 3.8  
Lt) of S.A.E. Type A automatic transmission fluid.  
When filling, allow the fluid to settle behind the  
tapered bearings into the axle supports. This may  
necessitate filling, checking and adding. The oil  
fill hole is located in the case. If the shrouding on  
the equipment does not allow access to the oil fill  
hole when the 2500 is installed in the chassis,  
lubrication should be filled prior to installation in  
the equipment. If filling takes place before installing  
RETAINING RING  
Other  
1. Check thrust washers for wear.  
2. Check tapered roller bearings for wear and ease of  
rotation.  
o
the 2500, orient the unit to a 90 angle to the axles.  
There should be no fluid leak.  
3. Replace the shifter rod oil seal after assembly of  
all parts.  
4. Install the drive assembly according to the  
manufacturer’s instructions.  
4. Check thrust bearing for wear. Replace any parts  
necessary.  
90  
LOW RANGE TRANSMISSION  
DRIVE GEAR  
HYDROSTATIC DRIVE  
MOUNTING SURFACE  
DRIVEN  
INPUT  
GEAR  
HIGH RANGE TRANSMISSION  
DRIVE GEAR  
SPACER  
THRUST BEARING  
SPACER OR SHOULDER  
INPUT SHAFT  
THRUST WASHER  
TABBED THRUST WASHER  
SHIFTER AND BRAKE SHAFT  
OIL SEAL  
BEVELED SIDES OF GEARS  
OUTPUT SHAFT  
TABBED THRUST  
WASHER  
TABBED THRUST  
WASHER  
THRUST  
WASHER  
THRUST  
WASHER  
SEAL  
BALL BEARINGS (2)  
"O" RING SEAL  
ROLLER BEARINGS (2)  
NOTE: NO BEARING AT THESE POINTS  
NEEDLE BEARINGS (2)  
91  
2500 SERIES TRANSAXLES  
LUBRICATION  
Part No. 730229B  
Refer to O.E.M. manual for  
type of lubrication.  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
92  
CHAPTER 17. 2600 SERIES HYDRO POWERED TRANSAXLES  
It is recommended that you take  
special notice of all items  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
5. To remove axle out of its support, tap lightly with a  
mallet from the inside out. A pressed-on sealed  
bearing will be on the end of axle.  
WARNING  
6
. Position the unit with the cover side up. Then remove  
the dowels and screws. Lift the cover off, and discard  
the gasket.  
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
DIFFERENTIAL  
INPUT SHAFT  
SHIFTER SHAFT  
SHIFTER GEAR  
CLUSTER  
GENERAL  
The 2600 series transaxle has infinite forward and®  
reverse speeds. It is powered by a Sundstrand  
hydrostatic drive connected to an engine with up to a  
OUTPUT SHAFT  
Dual Range with Lock Differential  
2
0 Horsepower rating. The 2600 series are shipped  
INPUT SHAFT  
DIFFERENTIAL  
without lubrication from Tecumseh/Peerless. Original  
equipment manufacturers fill each gear case with  
lubricant when installing the 2600 in the equipment.  
Lubrication for the 2600 is 7 to 8 pts. (3.3 - 3.8 Lt)  
SAE Type A automatic transmission fluid.  
COUNTER  
SHAFT  
DISASSEMBLY  
1
. Remove the hydrostatic pump as necessary to allow  
OUTPUT SHAFT  
repair.  
Single Range without Lock Differential  
NOTE  
There are two different 2600 models as shown  
above.  
An oil supply is blocked in the hydrostatic pump when  
not running so upon reassembly, hydrostatic charging  
is not necessary.  
SPACER  
THRUST  
BEARING  
2
. Although the unit should have been drained of  
lubrication, be aware that upon removal of the axle  
support, the axle will be removed as well. This will  
allow trapped oil to spill.  
NOTE  
Any attempt to service the hydrostatic pump will be  
®
done only upon the authorization of Sundstrand or  
the equipment manufacturer. Tecumseh does not  
authorize repair or adjustments.  
THRUST  
WASHERS  
INPUT SHAFT  
3. Clean all exterior surfaces before disassembly.  
4. Scribe alignment marks on the unit before removal  
to assist in reassembly. Remove the axle supports.  
ALIGNMENT SLEEVES  
WILL BE PRESENT  
BETWEEN AXLE  
COUNTER SHAFT  
SUPPORT AND UNIT  
7
. To remove components from the single speed version,  
first remove the differential, thrust washers, drive  
gear, input shaft, countershaft, output gear and  
shaft.  
I.D. TAG  
93  
8
. To remove components from the 2 speed with locking  
differential version, remove the shifter rod and fork,  
the outside bolt, spring and detent ball. Next remove  
the high range gear; then the shifter gear cluster  
and fork assembly together.  
4. Splines should allow a smooth fit. Rotate meshing  
parts for a better fit if binding seems excessive.  
Shifter Mechanism (Dual Range).  
BOLT, SPRING AND BALL  
DIFFERENTIAL LOCK  
FORK ASSEMBLY  
HI-LOW SHIFT  
FORK AND  
ROD  
1. Check spring for tension and ball for wear.  
2
. Check shifter rod grooves for wear. Be sure snap  
ring sharp edges goes away from shifter fork on  
both shifter shafts.  
9
. Remove the input shaft assembly.  
HIGH RANGE GEAR  
THRUST WASHERS  
3. Inspect shifter fork for straightness and wear.  
Differential  
1
. Make sure you have all parts.  
. Check thrust washers for wear.  
2
THRUST BEARING  
SPACER  
LOW RANGE  
GEAR  
INPUT SHAFT  
LOCK COLLAR AND PIN ASSY.  
BALL BEARING  
1
0. Remove shifter shaft, output shaft and the output  
gear in this order.  
11. Remove differential and lock fork assembly together.  
INSPECTION AND REPAIR  
Axle Supports.  
LOCK DIFFERENTIAL  
NON-LOCK DIFFERENTIAL  
1. Check the roller bearings on the axles. Clean and  
remove any rust.  
3
. Check differential lock collar for fork or pin wear.  
2
. Clean the axle supports and inspect.  
4. Check ball bearings for ease of rotation. Replace  
any parts if necessary.  
Case and Cover.  
ASSEMBLY  
1. Check for leaks or cracks.  
Install parts reversing the disassembly procedure. Be  
careful of the following:  
2
. Replace all oil seals. As necessary, replace needle  
bearings as described in Chapter 22 on bearing  
service.  
1
. After the shifter rod is positioned, install the detent  
ball, spring and bolt. Turn the set bolt inward (dual  
speed) until it contacts the case.  
3
. Do not replace brake shaft seal, brake shaft, shifter  
rod and shifter differential lock seals until the unit  
is reassembled.  
2. Be sure that thrust washers and spacers are between  
every shaft and case and cover.  
Shafts and Gears.  
1. Check teeth for wear, pitting or breakage.  
2. Inspect bearing surfaces for smoothness.  
3. Inspect gears and shafts for an out-of-round condition.  
3. Threads of the differential bolts must be coated  
with standard stud Loctite. The bolt heads are up  
when installed. Refer to Chaper 18 on differentials.  
4
. Install a new gasket. It may be helpful to dampen  
the gasket with oil for easier installation.  
94  
5
. To place axle assemblies into case and/or cover,  
grease axle spline ends heavily. Push the axle  
through the seal, using extreme caution when axle  
splines are going through the seal.  
NOTE  
If you do not have the proper seal protector spray axle  
with brake cleaner and when dry, place one layer of  
thin, clear packing tape around splines and keyways.  
Lubricate the exposed tape, and the seals will be  
protected when pushing the axles through.  
6
7
8
9
. After the unit is assembled install the brake shaft  
oil seal, using a seal protector/installer.  
. Install the shifter rod oil seal, using the seal protector  
670206 and driver 670211.  
. Install the locking differential shifter rod oil seal,  
using the seal protector 670206 and installer 670211.  
. Lubrication for all models is 7 to 8 pints (3.3 - 3.8  
Lt) of SAE Type A automatic transmission fluid.  
95  
2600 SERIES HYDRO POWERED TRANSAXLE  
SINGLE SPEED  
LUBRICATION  
Part No. 730229B  
Refer to O.E.M. manual for  
type of lubrication.  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
96  
2600 SERIES HYDRO POWERED TRANSAXLE  
TWO SPEED  
LUBRICATION  
Part No. 730229B  
Refer to O.E.M. manual for  
type of lubrication.  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
97  
CHAPTER 18. DIFFERENTIALS  
It is recommended that you take  
special notice of all items  
WARNING  
100 SERIES DIFFERENTIAL  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
SNAP  
RING  
HOUSING  
AXLE  
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
THRUST WASHER  
PINION GEARS  
HOUSING  
DRIVE PIN  
4
. Remove the snap ring, bevel gear and thrust washer.  
GENERAL  
Slide the axle from the differential carrier housing.  
NOTE  
The differential assemblies of Tecumseh/Peerless units  
are grouped together in this section. Though there is  
little similarity between the 100, 600, 800 and remaining  
series units, they are grouped here because their  
function is the same.  
Bushings are replaceable in the differential carrier  
housing. To replace bushing, use bushing tool 670204.  
ASSEMBLY  
1
. Slip the axle into the differential housing carrier.  
Place the thrust washer and bevel gear on the axle  
and secure with a snap ring. Make sure the flat  
side of the snap ring is away from the gear.  
The differential assemblies for the 820, 1200, 1300,  
2
300 and 2400 series Peerless units are very similar.  
However, each must be assembled in its own way. By  
grouping them together, you will become more aware  
of differences in each unit.  
2. Place pinion gears and thrust washers on the drive  
pin and insert the assembly into either differential  
housing carrier.  
MODEL 100 DIFFERENTIAL  
DISASSEMBLY  
3. Use 3 oz. (89 ml) of bentonite grease as a lubricant.  
1
. Clean the outside of the differential. Remove all  
keys, pins, etc. Remove all burrs from keyways  
and holes. Use a stone on hardened shafts.  
4. Assemble the differential carrier housings and  
sprocket with 4 bolts and locknuts.  
NOTE  
AXLE  
No oil seals or gaskets are required in this unit. A few  
units use a gasket between the two housings and seals  
around the axles.  
HOUSING  
If no gasket is present, seal the housing with Loctite  
AXLE  
5
98 part number 788093 using a 1/8" (3.18 mm) bead.  
MODEL 600  
DISASSEMBLY  
SPROCKET  
LOCK NUTS (4)  
NOTE  
2
. Remove four (4) locknuts, bolts and the sprocket.  
Axles vary in length so make a sketch of which axle  
goes where.  
Separate the differential carrier housings.  
DRIVE PIN  
AXLE  
AXLE  
AXLE  
AXLE  
HOUSING  
PINION  
GEARS  
BEVEL GEAR  
ROLL PIN  
DRIVE PIN  
3
. Remove the drive pin, pinion gears and thrust  
1. Drive out the roll pin that secures the drive pin with  
a suitable punch.  
washers as a unit.  
98  
3
. Install the bevel pinions SIMULTANEOUSLY FROM  
OPPOSITE SIDES by rotating pinions in opposite  
directions while sliding into position in gear  
assembly. Check the alignment by inserting fingers  
into drive pin holes. If not aligned, the drive pin  
cannot be inserted. Remove and replace the bevel  
pinions as only one tooth out of position will cause  
misalignment.  
DRIVE PIN  
AXLE  
BEVEL PINIONS  
AXLE  
BEVEL GEARS  
AXLE  
BEVEL GEARS  
2. Remove the drive pin.  
BEVEL PINIONS  
BEVEL GEARS  
AXLE  
THRUST WASHERS  
4
. After aligning, insert thrust washers behind each  
pinion. Insert the drive pin and secure with a roll  
pin.  
MODEL 800  
BEVEL PINIONS  
DISASSEMBLY  
THRUST WASHERS  
1
. Same as disassembly for model 600, except for  
additional parts on the axle.  
3
. Thrust washers must be removed before attempting  
to remove the pinions. Remove the bevel pinions  
simultaneously by rotating the gears in the opposite  
direction; the gears will move out of position.  
2. Remove and inspect seals, bearings and washers  
for wear; replace if necessary.  
3
. If differential was disassembled note positioning  
of differing length axles so correct reassembly may  
be performed.  
REASSEMBLY  
1. Reassemble in reverse order of disassembly.  
SNAP RING  
CUP FACES  
CUP FACES  
OUT  
OUT  
SEAL  
SEAL  
4. Remove snap ring, bevel gear and thrust washer.  
Slide the axle out.  
BEARING  
WASHERS  
BEARING  
5. Inspect the bushings and gears for wear and replace  
when necessary.  
REASSEMBLY OF DIFFERENTIAL ASSEMBLY  
BEARING  
NEEDLE TYPE)  
BEARING  
NEEDLE TYPE)  
(
(
1. Place axles (left and right) into differential gear  
assembly. Install thrust washers.  
2
. Install seal cup end out from the center of the  
2. Place the bevel gears on the shaft and install the  
snap ring in the groove on the shaft.  
differential to prevent dirt entry.  
99  
MST SERIES DIFFERENTIAL  
OLD STYLE  
A"  
SQUARE CUT  
O" RING  
"
This unit is similar to the 900, except it uses no bearing  
blocks. The differential is supported by the shoulders  
on the ring gear.  
"
"
C"  
CAST IRON DIFFERENTIALS USED IN TECUMSEH/  
PEERLESS TRANSAXLES  
SEAL  
NEW STYLE  
RING GEAR  
"
B"  
DIFFERENTIAL  
"D"  
HEAVY DUTY SEALED  
BALL BEARING  
SEAL  
BEARING SURFACE  
HEX HEAD BOLT  
The 800 Series has used four styles of axle bearings.  
The earliest style “A” was a smaller loose cage needle  
bearing and must have the seal to the outside of that  
bearing. Style “B” must have the seal to the outside of  
the bearing. When bearing style “C” is used, a square  
cut “O” ring must be used on each side of the bearing.  
Bearing style “D” is a sealed ball bearing used in Heavy  
Duty applications. Styles “B”, “C” and “D” are  
interchangeable. Needle bearings A, B, and C must  
be repacked with E.P. Lithium grease.  
NOTE  
The models covered are the 820, 1200, 1300, 1700,  
2000, 2300 and 2400 series.  
The differential construction may vary from the  
illustrations but is basically similar.  
NOTE  
FOUR RETAINING BOLTS  
SNAP RING  
RETAINER  
Needle bearings are lubricated with E.P. grease. DO  
NOT USE BENTONITE on needle bearings. For  
maximum gear train life use only Bentonite grease on  
all shafts and gears, Tecumseh part number 788067C.  
8
6
4
5
1
7
2
3
MODELS 900, 910, 915, 920 and 930  
DIFFERENTIAL  
DIFFERENTIAL  
CARRIER WITH  
THREADED  
PINION GEAR  
DRIVE BLOCK  
This style differential is supported by the case and  
cover with thrust load being absorbed by either bearing  
blocks or a bearing strap as shown. Both types use  
thrust washers on the axle bevel gears.  
BOLT HOLES  
DIFFERENTIAL  
GEAR  
DRIVE PIN  
DIFFERENTIAL ASSEMBLY  
The 1200 series differential carrier is supported directly  
on the axle (1). Roller thrust bearings (2) are used  
between the bevel gear (3) and the differential carrier  
BEARING STRAP  
(
4). This illustration shows axles with snap ring (5)  
DIFFERENTIAL  
BULL GEAR  
retainers; some earlier production had rolled over axle  
ends to secure the assembly. Thrust washers (6) are  
used at the ends of the differential carriers and the  
case/cover thrust face. The drive pin (7) and drive blocks  
(8) are similar to those used on the 1700 series. Replace  
the differential carrier if worn in excess of .878 (22.3  
mm) at point A.  
BEARING BLOCKS  
BEVEL  
GEAR  
AXLE  
WASHER  
2
SNAP RINGS  
BEVEL PINIONS  
RING GEAR  
Ensure you have all of the parts as the unit is assembled  
in your hands and placed directly into the case.  
1
00  
2
THRU BOLT HOLES  
DRIVE PIN  
RING GEAR  
POINT Ab  
1
3
DRIVE BLOCKS  
TWO PINIONS  
The 2000 series, three speed and the 2300 series,  
four speed differential will be discussed in this section.  
Examine the external bearing race on the differential  
carriers (1) for wear or pitting. Replace if necessary.  
The differential carriers in this assembly have  
replaceable bushings (2). Replace if worn in excess  
of .878" (22.3 mm) at point A. See Chapter 22 on  
Bearing and Bushing Service. These differentials have  
been built with rolled axle ends and also snap rings  
5
. If a snap ring is used, the axle assembly may be  
disassembled. If the axle end has been rolled, do  
not attempt to break the rolled retaining edge. The  
parts are to be replaced as an assembly.  
SNAP RING  
RING GEAR  
AXLE END  
(
3), as illustrated.  
DISASSEMBLY  
1
. Clean the differential assembly, then check and  
note the axle lengths and their relation to the heads  
of the four hex screw bolts.  
THRUST  
DRIVE BLOCK  
2. If the unit will not turn freely, note where the unit  
binds. Check and replace those parts.  
WASHER  
SEAT  
FOUR HEX  
HEAD  
BOLTS  
6
. Remove the snap ring and the thrust washer.  
Separate the bevel gear and the differential carrier  
from the axle.  
RING GEAR  
INSPECTION  
1. See Chapter 22 on Bearing and Bushing Service.  
BEARING RACE  
2
. Examine the gears for wear, cracked or chipped  
teeth. Check the internal splines of the gears and  
axle if the gear is removable. If excess play is noted,  
it may be necessary to replace the individual parts  
or both the gear and axle.  
DIFFERENTIAL  
CARRIER  
3
. Examine the drive pinions, drive pins and drive blocks  
for wear and damage. Replace the pinion or the  
drive pin if excessively worn.  
3
. Place the differential in a large vise with soft jaws  
(
hex head bolts up). Do not clamp the vise on the  
bearing race of a differential carrier.  
4
. Remove the four hex head bolts, the upper axle  
and differential carrier. Remove the drive blocks,  
pinions, drive pin and thrust spacer if used, by lifting  
them out of the ring gear. Tap the ring gear lightly  
with a mallet to loosen them from the differential  
carrier.  
101  
TESTING  
HOLES THREADED  
IN ONLY ONE  
DIFFERENTIAL  
CARRIER  
1
. Test the differential action by holding the upper  
axle vertically, and spinning the differential. The  
unit should spin and rotate freely. Place the  
assembly on the bench and rotate both axles in  
different directions. If any binding is noted in either  
test, check retaining bolt torque, gear meshing, or  
bearing surfaces in the differential carriers. Little  
or no play should be apparent between the axles  
and carriers.  
SNAP RING  
BEVEL GEAR  
DIFFERENTIAL  
CARRIER RING  
GEAR REMOVED  
THRUST  
WASHER  
DUO-TRAK (Illinois tool works)* DIFFERENTIAL  
OPERATION  
4
. Examine the differential carriers. One has threaded  
holes and the other has larger holes so the bolts  
will pass through. Be sure to order the correct  
replacement parts.  
A cylindrical spring in the center of the unit presses  
the ten pinion gears against their pockets setting up  
a resistance to rotation. This resistance serves to lock  
up the gears in the differential until a moderate tractive  
difference in the wheels causes the resistance to be  
overcome. At this time the unit will act similar to a  
regular differential. The break away occurs when the  
equipment is turning, but under different tractive effort  
situations, such as operation on wet grass or snow.  
The spring acts to transmit torque to the non-tractive  
wheel to move the equipment.  
5. Examine the internal bearing diameter of the  
differential carriers.  
SERRATED AXLE END  
DISASSEMBLY, INSPECTION AND REPAIR  
Parts breakdown will be found on the next page. Remove  
the four through-bolts. Separate axle assemblies from  
the body cores. To disassemble the axles, remove  
the snap ring and retained parts. Be sure the flanged  
thrust washer goes toward hub end of the axle upon  
ROLLER THRUST  
DIFFERENTIAL  
CARRIER  
BEARING WITH  
ONE THRUST  
WASHER  
o
reassembly. Use a pair of large 90 tip snap ring pliers  
and remove the cylindrical spring putting tension on  
the ten pinion gears. Once the spring is removed, the  
gears can be removed. Separate the two body cores  
from the ring gear.  
6
. When assembling thrust bearings, always place a  
hardened thrust washer on each side of the caged  
thrust rollers. Never use the caged thrust rollers  
without the thrust washers.  
ASSEMBLY  
Install the body cores to the ring gear so that the pockets  
in one core are out of alignment with pockets in other  
core. Reassemble the thrust washers, bearing, carrier  
and side gear to the axle and secure with the snap  
ring. Install the pinion gears on one side, then use the  
differential carrier and axle to hold them from falling  
out when the unit is turned over. The side gear must  
mesh with the flat pinion. Install pinions in the other  
side to mesh with the previously installed pinions. Insert  
REASSEMBLY  
1
. Oil all parts during reassembly. Select the correct  
axle for the side of the differential opposite the  
hex head bolts. If the wrong axle is used it will  
require complete teardown of the differential, or  
possibly the entire transaxle.  
2
. Clamp the axle, in a soft jaw vise (not the bearing  
or oil seal surfaces). The differential carrier with  
threaded holes is assembled to this axle.  
o
the cylindrical spring with a pair of large 90 tipped  
snap ring pliers so that it bottoms on the side gear.  
All ten pinions should be in contact with the spring.  
Install the other axle and secure the assembly with  
four through bolts and torque to 7-10 ft. lbs. (5.2 - 13.6  
Nm).  
3. Torque the four hex head bolts to 7 ft. lbs. (5.2  
Nm).  
1
02  
BODY CORES  
RING GEAR  
PINION GEARS  
SPRING  
ONLY OLDER UNITS)  
(
SNAP RING  
®
DUO-TRAK "  
"
®
DUO-TRAK is the trademark of a patented limited slip differential designed by Illinois Tool Works.  
*
The Model 2600 transaxle has the unique customer option of a semi-locked differential. This system acts like  
a locked differential until the torque at the axle exceeds 50-70 ft./lbs. (68 - 95.2 Nm). At this point it acts like a  
regular differential. Using the following procedure, you can check for proper condition of this optional unit used  
on a few 2600 models, but not on all units.  
1
. Lift the rear of the tractor up so both tires are off the ground. Rotate one tire while in neutral; the other tire  
should rotate in the same direction. If not, disassemble the unit. If it does proceed to step 2.  
2. Lock one axle or wheel assembly so it can not turn.  
3. Using a torque wrench and socket on the other axle, turn in a clockwise rotation noting the break away  
point. It should be between 50-70 ft. lbs. (68 - 95.2 Nm).  
4. If the torque is low, you will need to split the ring gear and carrier. Remove any shim between the two halves.  
If you do not find a shim, you will need to replace the spacer block. (see Illustration)  
5
. Re-assemble and check for proper break away torque as listed above. Breakaway should not exceed  
7
0 ft./lbs (95.2 Nm).  
BELLEVILLE WASHER  
ORIENTATION  
103  
CHAPTER 19. DRIVES  
This chapter relates to service of all Right Angle and T-drives.  
It is recommended that you take  
special notice of all items  
WARNING  
DRIVE BEVEL GEAR  
SNAP RINGS  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
Use approved safety procedures  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
FINNED COVER  
OUTPUT SHAFT  
DRIVEN BEVEL GEAR  
IN LOWER POSITION  
3
. Output shafts achieve a different rotation by  
mounting a gear at the top or bottom of the shaft.  
GENERAL  
1
. Prior to removing the assemblies, examine the  
following items that may have failed causing the  
right angle drives to appear inoperative.  
1
/2" (12.7 mm) TO  
/4" (19.1 mm)  
MACHINE BOLT  
APPROXIMATELY  
3
DIAMETER BOLT  
4" (10 cm) LONG  
2
3
4
. Drive belts: Inspect for breaks, tension, oil or grease  
OUTPUT  
SHAFT BALL  
BEARING  
HEX NUT  
saturation and inoperative tightening devices.  
. Pulleys: Tighten retaining screws. Examine for  
sheared keys.  
LARGE WASHER TO  
REST ON OUTER  
BEARING  
. Mower blade clutches and breakaway devices; some  
blades have slip type clutches that may slip during  
operation which may cause the right angle drives  
to appear to be damaged. Shearing devices are  
also used to absorb a damaging impact load. Check  
and replace the clutch members or shearing devices  
prior to removal of the right angle drive if a failure  
is noted.  
METAL PLATE TO  
PROTECT LOWER  
BEARING  
INPUT SHAFT  
BEVEL GEAR  
4
. If the driven bevel gear is on the bottom, remove  
the snap ring on the output shaft and pull out the  
output shaft.  
5. Loose blade retaining nuts; Check torque and  
tighten if required.  
5. Remove the output shaft bearing by using a large  
machine bolt, washer and nut.  
FINNED COVER RIGHT ANGLE DRIVE  
When finned cover right angle drives are to be serviced  
because of lubricant leakage, it will be necessary to  
replace the ball bearings.  
SNAP RING  
OUTPUT SHAFT  
AND BEARING  
DISASSEMBLY  
1. Scribe marks on the covers and shafts to ease in  
reassembly.  
2. Remove the cover, gasket and the lubricant from  
the drive.  
INPUT SHAFT  
6
. The input shaft bearing, input shaft and bevel gear  
may now be driven out of the housing. Press the  
bearing into housing to remove.  
7
. The top ball bearing in the blind end of the housing  
is removed by heating the housing on a hot plate  
and tapping the outside of the housing with a  
nonmetallic mallet. Another option is to simply load  
the bearing area with grease and tap the output  
shaft in the center of the bearing quickly with a  
hammer. It will pop the bearing out of its position.  
1
04  
NUT  
WASHER  
MOWER BLADE  
APPLY SMALL  
AMOUNT OF GREASE  
BETWEEN NUT AND  
MOUNTING SURFACE  
Clockwise  
LEFT HAND  
8
. Right angle drives with the driven bevel gear at the  
top will have to be disassembled as illustrated above.  
The output shaft is larger in diameter inside than  
outside. When the output shaft is pulled out, the  
bearing will also be removed.  
INSPECTION  
Clockwise  
Clean all parts in a cleaning solvent. Examine for wear  
or damage and replace as needed. Use care when  
handling ball bearings. See Chapter 22, Bearing and  
Bushing Service.  
Counter Clockwise  
RIGHT HAND  
REASSEMBLY  
Assemble in reverse of the disassembly instructions.  
It is important that only ball bearings with snap rings  
be used for the input shaft and top output shaft bearing.  
Use a tool for driving in bearings. In the event bearing  
bore is tight in the housing, heat the housing on a hot  
plate. Place a steel plate on the hot plate and rest the  
housing on the steel plate. DO NOT OVERHEAT. Work  
rapidly after removing the housing from the hot plate.  
Use care to prevent burns.  
Clockwise  
LUBRICATION  
See Lubrication Chart in Chapter 1.  
Counter Clockwise  
RIGHT HAND  
Clockwise  
LEFT HAND  
Clockwise  
RIGHT ANGLE DRIVE ROTATION  
Clockwise  
105  
DISASSEMBLY  
SMOOTH COVER RIGHT ANGLE DRIVE  
1
. Scribe marks on the covers and shafts to aid in  
reassembly.  
BEARING AT INNER EDGE OF  
MACHINED SURFACE  
GASKET  
SEAL  
COVER  
INPUT  
SHAFT  
BALL BEARING  
2. Remove the cover, gasket and lubricant.  
INPUT SHAFT  
DRIVING BEVEL  
GEAR  
SERVICE  
Leaking lubricant: Correct lubricant leakage by replacing  
the seals at the input and output shaft as described  
below.  
1
. Input shaft seal replacement: Remove four screws  
and the cover. Replace the seal by driving in squarely  
so that it is .040'’ to .050'’ (1.02 - 1.27 mm) below  
flush. Use tool 670293 to protect the seal when  
replacing the cover and seal assembly over the  
input shaft. Place the seal protector on the shaft  
and coat with oil. Slide the seal and cover over the  
sleeve. Tighten the seal retainer screws and remove  
the sleeve.  
SNAP RING  
3. If the unit is built with the bevel gear on the input  
shaft toward the cover, remove the snap ring from  
the groove of the input shaft.  
SHEET METAL  
SCREW  
OUTPUT SHAFT  
HOLE IN SEAL  
SNAP RING  
OUTPUT SHAFT  
SEAL  
2
. Output shaft seal replacement. Remove the seal  
by punching two small holes in the seal with an  
awl as close to the outer edge of the seal as possible  
and opposite each other. Use care when making  
holes in the seal so ball bearing underneath is  
not damaged. Do not use a drill. Insert sheet metal  
screws into the holes and pull on the screws to  
remove the seal. Long screws may be turned in  
until they contact the outer race of the ball bearing  
and turned to lift out the seal. Place seal protector  
4
. Remove four screws and the cover/seal assembly.  
. Remove the seal at the output shaft.  
5
6. Remove the snap ring on the output shaft and tap  
it with a mallet on the outside end to drive it and  
the inner ball bearing out of the housing. Remove  
the output end ball bearing by driving it out from  
the inside.  
6
70293 on the shaft, lubricate generously with oil  
and slide on the seal. Drive the seal into the housing  
until it is flush with the bottom of the housing.  
1
06  
T” DRIVE SERVICE  
BEVEL GEAR  
1
. Before removing a “T” Drive from equipment, be  
sure to scribe marks at one mounting hole to ensure  
correct reassembly.  
OUTPUT SHAFT  
"T" DRIVE WITH DIFFERENT INPUT AND  
OUTPUT ENDS OF INPUT SHAFT  
DRIVE MODEL  
NUMBER  
BALL BEARING  
7
. Remove the input shaft from the ball bearing with  
an arbor press. Always support the inner race when  
removing and replacing the input shaft into the ball  
bearing. Use tool 670293 to support the inside ball  
bearing race.  
"
T" DRIVE WITH IDENTICAL  
INPUT AND OUTPUT ENDS  
OF INPUT SHAFT  
BLIND  
BEARING  
2. To disassemble “T” Drive, remove self-tapping screws  
and housing cover and clean grease from internal  
area. Note and mark near the gasket surface on  
the side where the beveled input gear is located.  
SNAP RING  
DRIVEN BEVEL  
GEAR ON OUTPUT  
SHAFT  
o
Switching the “T” 180 will result in the output shaft  
having the opposite rotation.  
WHEN THE INPUT END OF SHAFT IS ON THIS  
END THE OPPOSITE END IS THE OUTPUT  
BEARING CAP AND  
SEAL RETAINER  
INPUT SHAFT  
8
. The ball bearing that supports the inside end of the  
input shaft is removed by holding the housing in  
hand while tapping the housing sharply on the outside  
with a nonmetallic soft mallet behind the bearing.  
It may be necessary to heat the housing to remove  
this bearing. Be careful not to distort the case by  
overheating.  
HOUSING  
OUTPUT  
SHAFT BEVEL  
GEAR  
IF INPUT END OF  
SHAFT OTHER END IS  
OUTPUT END  
INSPECTION  
INPUT SHAFT  
BEVEL GEAR  
Clean all parts in a cleaning solvent. Examine for wear  
or damage and replace parts as needed. Use care  
when handling ball bearings. See Chapter 22 on Bearing  
and Bushing Service.  
3
. Remove cap screws and both retainer cap and seal  
assemblies. Separate and discard oil seals and  
gaskets.  
REASSEMBLY  
Assemble the unit in reverse of the disassembly. When  
building up the unit, it is important to install the correct  
input shaft and identify it with the correct cover. Use  
the identifying scribe marks to assemble parts correctly.  
BEARINGS ARE  
SLIP FIT ON BOTH  
INNER AND OUTER  
RACES  
LUBRICATION  
See the Lubrication Chart in Chapter 1.  
4
. Press input shaft ball bearings out of the housing  
with fingers. If they stick, tap lightly using a drift  
punch around the outer race.  
107  
9
. Press shaft, bearing and gear assembly into the  
housing until outer bearing race bottoms in its  
retaining cavity.  
10. Install the outer bearing and a new snap ring.  
USE THE PROPER  
SIZE SEAL  
PROTECTOR  
HOLD GEAR WITH FINGERS,  
THEN TAP ON END OF  
SHAFT WITH MALLET TO  
SEPARATE  
ALWAYS REPLACE  
OIL SEALS  
5
. Using a soft mallet, separate the input shaft and  
gear. A slight press fit holds a spline surface on  
the shaft in a spline of the gear.  
6
. Remove and discard the output shaft oil seal. TAKE  
CARE NOT TO SCRATCH THE SHAFT. Remove  
and discard the snap ring and tap the shaft into  
the housing using a nonmetallic mallet.  
11. Install a new oil seal, using a seal protector sleeve  
part # 670293 and driver until the seal is flush with  
the housing.  
TO REMOVE GEAR  
REMOVE SNAP  
RING  
REMOVE SNAP RING  
POSITION OIL SEAL  
USE THE PROPER  
THEN USE SEAL  
SIZE SEAL  
DRIVER TO SEAT  
PROTECTOR  
SEAL SQUARELY TO  
THE PROPER DEPTH  
TO REMOVE BEARING  
TO ALLOW SHAFT AND  
BEARING TO DROP OUT  
OF HOUSING  
REMOVE GEAR, AND  
PRESS BEARING  
INNER RACE  
7
. If necessary, remove the snap ring to separate the  
gear and bearing from the shaft. Hold the gear and  
bearing in one hand and tap the end of the shaft  
vigorously with a soft mallet.  
1
2. Position the input bevel gear in mesh with the output  
shaft bevel gear. Tap the input shaft into place with  
a nonmetallic mallet. Use one hand to hold the  
gear and shaft to dampen the blows from the mallet.  
Be sure gear is on the marked side of the housing.  
Cleaning, Inspection and Repair  
1. Clean all parts of grease, rust, or foreign material.  
2
. Dry all parts. Compressed air may be used on all  
parts EXCEPT BEARINGS.  
13. Align the shaft and insert a ball bearing on each  
bearing surface by hand.  
3. Check bearings for smooth rotation, then lubricate.  
14. Install new seals in the retainer caps using a driver.  
4. Remove all burrs and scratches from shafts with a  
fine file or stone.  
15. Using seal protector # 670293 over the shaft serrated  
ends; install new gaskets and the bearing cap.  
Tighten retaining cap screws to 8-11 ft. lbs. (27.3 -  
5
6
7
8
. Check housing for cracks or pulled metal.  
1
4.7 Nm).  
. Replace all snap rings.  
16. Lubrication: See the Lubrication Chart in  
Chapter 1.  
. Replace all oil seals.  
. If separated, install the inside ball bearing and bevel  
gear on the output shaft. Be careful of alignment.  
The use of a press is preferable to installing bearings  
and seals with a mallet.  
1
7. Install the gasket and cover and secure with self  
tapping screws. Torque to 20-24 in. lbs. (2.3 - 2.7  
Nm).  
1
8. Align scribe marks and install “T” Drive on the  
equipment.  
1
08  
CHAPTER 20. 1100 SERIES DRIVES  
It is recommended that you take  
special notice of all items  
DISASSEMBLY  
WARNING  
discussed in this manual and wear the appropriate  
safety equipment. Failure to do so may result in  
death or serious injury.  
SNAP RING BEARING ASSEMBLY  
SEAL  
"O" RING  
GEAR  
Use approved safety procedures  
SHAFT  
WARNING  
with equipment for removal/  
installation of axles, keyways and hardened shafts.  
Remove all burrs and sharp edges with a honing  
stone or crocus cloth before installation. Failure  
to do so could result in equipment damage, death  
or serious injury.  
CAGE  
GENERAL  
SNAP RING  
"O" RING  
1. Scribe marks on the covers and shafts to aid in  
reassembly.  
I.D. TAG  
2. Clean and check all shaft ends before removing  
the cap and cage assembly.  
MAIN HOUSING  
CAP  
OPTIONAL  
VENT  
RING  
O" RING  
"
O" RING  
RING  
CAGE  
"
CAGE  
3
. Remove the four input cage bolts and remove the  
input cage; the assembly will follow.  
The 1100 series angle drive is a heavy duty gear box  
used with larger equipment with horse power ratings  
up to 20 H.P. This unit is of cast iron construction for  
strength featuring tapered roller bearings for longer  
life. It can be configured wither as a right angle drive  
with right or left handed rotation, or a “T” drive.  
Reassembly is the reverse of the disassembly  
procedure.  
4
. To disassemble the input cage assembly, first remove  
the nut and washer that holds the large keyed  
gear onto the shaft. With an outside puller, if  
necessary, remove the gear. The roller bearings  
will be attached.  
109  
1
0. Remove the snap ring.  
5
. Remove bearing from gear by using a bearing splitter  
and puller.*  
11. On the other end, use the same puller and remove  
both the keyed gear and bearing at the same time.  
6
. Remove the shaft out of the cage. Remove roller  
bearing with outside puller toward threaded side. *  
Then remove the snap ring.  
12. Remove the snap ring.  
*
When roller bearings and races are removed with a  
SOFT PLUG  
bearing puller, discard and do not reuse.  
SNAP RINGS  
7
. To remove the races, simply tap out with a punch  
and hammer. The large snap ring will be left in the  
cage when all parts are removed.  
13. To remove the 1-3/4'’ (44.5 mm) soft plug, simply  
tap it out of the case. Discard the old plug.  
1
4. To remove races, simply tap the race out of the  
cap and pry the crush ring out. The other race  
can be tapped out with a punch and hammer. If  
the unit is not equipped with a plug, very carefully  
pry the race and crush ring out of cap and discard.  
INSPECTION  
Clean all parts in cleaning solvent. Examine for wear  
or damage and replace as needed.  
8. Remove the output cap and the assembly will follow.  
9.  
To disassemble the output shaft assembly, first  
remove the bearing that is located under the cap  
on the shaft, by using an outside puller.*  
NOTE  
Do not hook a puller on the snap ring.  
1
10  
REASSEMBLY  
CRUSH RING  
It’s very important when assembling this unit that you  
use all new seals and “O” rings.  
WOODRUFF KEY  
SNAP RINGS  
CAP  
5.  
Before installing the cover, first install a new crush  
ring into the cover. Press a new race up to the  
crush ring. To properly set up the output shaft  
preload, place the shaft into the case, and place  
the cover over the shaft without the case/cover  
shim and “O” ring. Tighten the four bolts to a torque  
of 200 in. lbs. (22.6 Nm) at 50 inch pound (5.65  
Nm) increments.  
1.  
Following the scribe marks, press the keyed gear  
on if necessary, and replace the snap rings on  
the output shaft.  
6.  
Now remove the cover and place a new case/cover  
shim with a new “O” ring and torque to 200 in lbs.  
(22.6 Nm) at 50 inch pound (5.65 Nm) increments.  
SOFT PLUG  
2.  
Make sure the inner bearing race is used when  
pressing roller bearings into place.  
NOTE  
Service bearings for this unit may have a shim in the  
box along with a new outer race. When pressing the  
bearing next to the gear, place the shim for that bearing  
and race (if present) next to the gear first, then press  
in the race and bearing.  
7. To install a 1-3/4'’ (44.5 mm) soft plug, tap in  
carefully with the lip up until 1/16'’ (.34 mm) below  
flush is achieved.  
BEARING RACE  
"O" RING  
"O" RING  
SNAP RING  
CAGE  
BEARING RACE  
8
.
.
To assemble the cage assembly, place the large  
snap ring in its mounting area in the cage. Press  
the small race to the snap ring from the outside.  
3
.
.
Install the other bearing that fits into the cap without  
the shim.  
4
The race that is used with a roller bearing on the  
gear side mounts into the case. Press the race in  
carefully until seated.  
9
Press the large race into the cap.  
NOTE  
Make sure that all races and roller bearings are kept  
together as provided.  
111  
WOODRUFF KEY  
SNAP RING  
ROTATE CAGE WHILE  
TIGHTENING NUT  
10. Place a small snap ring on the shaft.  
1
1. Press a roller bearing on the shaft to the back  
side of the snap ring and do not use a shim. Install  
the woodruff key.  
1
4. To achieve a proper pre-load on the bearings, place  
the outboard side of shaft in a protected jawed  
vice. Begin to tighten the nut on the gear side,  
while turning the cage until a very slight drag is  
achieved. Tighten so the bearing in the cage housing  
does not have end play and the parts should spin  
freely.  
GEAR  
SHIM  
IF REQUIRED  
BEARING  
1
5. After loading to the bearing is done, place a new  
O” ring around the outer diameter of the cage  
and position it in the case. Reinstall bolts and  
tighten to a torque of 200 in. lbs. (22.6 Nm).  
1
2. Press a large shim and a new large roller bearing  
onto the gear pressing on the inside bearing race.  
1
6. To install seals, use a 1'’ seal protector. Position  
seals so that they are installed .100" (2.5 mm)  
below flush.  
"O" RING  
LUBRICATION  
After assembly, fill with 1 pt. (473 ml) E.P. 90 gear oil.  
"O" RING  
1
3. Place the shaft into the proper position in the cage,  
and place the gear with the bearing onto the shaft.  
1
12  
1100 SERIES DRIVE  
LUBRICATION  
Oil Bath  
1
6 oz. (473 ml) S.A.E. E.P. 90 Oil  
Part No. 730229B  
The above illustration is supplied as a general assembly guide, your model may be different based on  
manufacturers requirements.  
113  
CHAPTER 21. SHIFTING ASSEMBLY  
It is recommended that you take special notice of all items discussed in this manual  
and wear the appropriate safety equipment. Failure to do so may result in death or  
WARNING  
serious injury.  
Use approved safety procedures with equipment for removal/installation of axles, keyways  
and hardened shafts. Remove all burrs and sharp edges with a honing stone or crocus  
cloth before installation. Failure to do so could result in equipment damage, death or serious injury.  
WARNING  
KEY SPRING HEIGHT  
To check shifting keys for loss of spring height, place the short flat portion of a key on a flat surface as shown,  
measure the distance from the surface to the key tip. The measurement should be from .400" to .460" (10.2-  
11.7 mm); if the measurement is below .400" (10.2 mm) the key should be replaced.  
VERTICAL INPUT  
.
.
400 (10.2 mm)  
460 (11.7 mm)  
H-SHIFT PATTERNS  
IN-LINE SHIFT PATTERN  
HORIZONTAL INPUT H-SHIFT PATTERNS  
7
8
9
9
00 SERIES  
00, 820 SERIES  
00, 910, 915, 920,  
30 SERIES  
MST SERIES  
6
00 SERIES  
(
2
AVAILABLE IN  
to 8 SPEEDS)  
FIGURE SHOWS  
5
SPEED UNIT  
LEFT HAND INPUT  
SHIFT LEVER ASSEMBLY  
RIGHT HAND INPUT  
1
1
2
200 SERIES  
700 SERIES  
000 SERIES  
1
2
700 SERIES  
000 SERIES  
NO LEFT  
HAND INPUT  
200 SERIES  
1
2
300 SERIES  
2300 SERIES  
1
14  
GENERAL  
REASSEMBLY  
1
. Prior to removing a shift lever assembly from a  
transaxle, make note of the position of the shift  
lever so that it may be assembled correctly to the  
shift lever housing.  
1. DOWEL PIN TYPE. Secure with a new dowel pin.  
A second dowel pin is used in some assemblies  
for alignment. This dowel pin is located on the gasket  
surface of the shift lever housing and fits into a  
mating hole in the transaxle.  
2
Move the shift lever to Neutral, if possible, before  
removing it from the transaxle. Clean around the  
lever housing to prevent dirt from falling into the  
transaxle. Cover this opening by inserting a clean  
rag with a screwdriver.  
QUAD RING SEAL  
ROLL PIN  
HANDLE END  
SHIFT LEVER  
DISASSEMBLY  
RETAINER  
1
. Place the shift lever in a vise so the shift lever  
housing is at least one inch from the top of the  
vise jaws.  
SNAP RING  
SHIFT LEVER  
HOUSING  
QUAD RING SEAL  
SHIFT LEVER  
SHIFT LEVER  
2
. SNAP RING TYPE. Secure parts with the snap  
ring. Before installing the shift lever and housing  
into the transaxle housing, ensure the shifting forks  
are in the neutral position.  
ROLL PIN  
3. Always use new gaskets between the shift lever  
housing and the transaxle.  
SHIFT LEVER  
RETAINER  
DOWEL PIN  
SHIFTING ASSEMBLY  
GENERAL  
1
. Differences in assemblies will be noted in the  
following servicing procedure. Always use the parts  
list for each model to obtain the correct parts.  
2
. DOWEL PIN STYLE. Locate the dowel pin holding  
the retainer in the housing from the outside. Place  
a 1/4'’ (6.3 mm) flat face punch on the gasket  
surface directly over the dowel pin. Strike the punch  
firmly with a hammer to dislodge the retainer from  
the shift lever housing. Always use a new dowel  
pin for reassembly.  
NEUTRAL GROOVE  
SHIFTER FORK  
DETENT BALL  
AND SPRING  
SHIFTER  
STOP  
SNAP RING  
SHIFTER ROD "A"  
SNAP RING  
3
. SNAP RING STYLE. Use a snap ring pliers for  
removing the snap ring; loosen the vise and  
disassemble the pieces.  
4
. Remove the shift lever from the shift lever housing.  
Examine the roll pin in the ball of the shift lever. If  
bent or worn, replace. When inserting a new roll  
pin in the ball, position so equal lengths protrude  
from both sides of the ball.  
SHIFTER ROD "B"  
SHIFTER FORK  
DETENT BALL  
AND SPRING  
NEUTRAL GROOVE  
5
. Oil leakage past the point where the shift lever  
enters the shift lever housing will require  
replacement of the quad ring seal in the shift lever  
housing.  
3
Stop, 3-Speed Transaxle Shifter Rod & Fork Assy.  
Prior to reassembly, be sure the bends in the shift  
lever correspond to the mounting on the vehicle.  
115  
NEUTRAL GROOVE  
SHIFTER FORK  
NEUTRAL GROOVE  
SHIFTER STOP  
INDEXING BALL  
AND SPRING  
SHIFTER  
STOP  
SHIFTER ROD "A"  
SPRING  
SNAP RING  
SNAP RING  
DETENT  
BALL  
SHIFTER ROD "B"  
SHIFTER FORK  
NEUTRAL GROOVE  
INDEXING BALL  
AND SPRING  
4
Stop, 4-Speed Transaxle Shifter Rod & Fork Assy.  
SHIFTER FORK  
2
. Shifting assemblies are removed from and installed  
into the transaxles by squeezing the top end of  
the shifter rods. This causes a binding that retains  
all parts during removal or installation.  
3
. Slide the shifter fork into the shifter rod until it  
lines up with the hole with the detent ball and spring.  
With a flat blade screw driver, press the detent  
ball into the hole and move the shifting fork  
completely onto the shifter rod.  
INSPECTION  
1
. Replace the shifter stop if worn or damaged.  
4
. Move the shifting fork to the neutral position. The  
neutral groove is the center groove. If the shifter  
rod has four grooves, the neutral groove is the  
second groove from the shortest end. This neutral  
groove can be seen through the hole in the shifter  
fork.  
2
. Examine the teeth and the internal splines of the  
two shifter gears. Replace damaged gears. The  
gears must slide freely on the shifter shaft.  
Excessive wear of the internal spline of the gears  
will create cocking and difficult shifting. Replace  
the gear if this condition is present.  
3
. Replace the shifter shaft needle bearings if wear  
is evident. See Chapter 22 on bearings for removal.  
Replace if the bearing surface of this shaft should  
be scuffed, pitted or worn to a diameter less than  
SNAP RING  
SHIFTER RODS  
ANNULAR  
GROOVE  
.
750'’ (19.1 mm).  
4. Replace other parts showing wear, looseness,  
cracks, etc...  
DISASSEMBLY  
NEUTRAL POSITION  
To disassemble the shifter and fork assembly, use  
the assembly procedure in reverse.  
SHIFTER FORKS  
ASSEMBLY  
1
. Reassemble the shifting assembly by following  
the illustrations. Lay the parts on the bench on a  
clean paper or shop cloth. Pay particular attention  
to the annular grooves in the shifter rods and snap  
rings.  
ANNULAR GROOVE  
SHIFTER  
STOP  
SNAP RING  
5
. When the shifter forks are properly assembled to  
the shifter rods and positioned in neutral, the ends  
of the notches in the shifter forks are in alignment.  
NEUTRAL GROOVE  
SHIFTER FORK  
DETENT BALL  
AND SPRING  
SHIFTER ROD "A"  
SNAP RING  
SHIFTER  
STOP  
SNAP RING  
SHIFTER ROD "B"  
SHIFTER FORK  
NEUTRAL GROOVE  
DETENT BALL  
AND SPRING  
2
. Assemble the shifter forks onto the shifter rods.  
The shifter forks are interchangeable.  
1
16  
Tecumseh Transmissions  
Shift Key Quick Reference Guide  
Service No.  
Length  
Where Used  
Shape and Size  
shown actual size)  
(
7
92071  
2.950"  
500s  
7
.493 cm  
7
92089A  
2.625"  
.668 cm  
700/800/801/910  
6
7
92094  
2.812"  
.142 cm  
728/A/729/A/757/A/759/780/792  
7
7
7
92018  
3.165"  
.039 cm  
900s  
8
92123A  
3.980"  
0.109 cm  
820/920/930  
1
7
7
92136A  
92131  
3.980"  
0.109 cm  
820/930/MST  
820-014/A  
1
4.040"  
0.262 cm  
1
117  
CHAPTER 22. BEARING AND BUSHING SERVICE  
GENERAL BEARING AND BUSHING CARE  
NEEDLE BEARING SERVICE  
It is advisable to use an arbor press to remove and  
install needle bearings.  
1
. Bearings, bushings and bearing surfaces should  
be thoroughly cleaned prior to examination. Examine  
closely for scuffing, wear, pitting, and abnormal  
conditions. Replace if any of these conditions appear.  
2
. Use clean, filtered solvent to clean bearings. Then  
use a clean, lint free cloth to dry the bearings.  
Immediately coat the cleaned bearings with lubricant  
to prevent oxidation and corrosion. If the bearing  
is to be stored, wrap in oil proof paper until needed.  
3
. Take care of bearings in the case and cover. Cover  
them to keep out any foreign material. Place the  
gasket surface down on clean paper and cover with  
a clean cloth. Never clean the lubricant from new  
bearings. This lubricant prevents damage before  
the transaxle lubricant enters the bearing.  
BALL BEARING SERVICE  
1
. Use a bearing tool to press out the bearing. Insert  
the proper tool in the bearing, and with an arbor  
press, press out the bearing from the inside.  
The ball bearings used in the outer ends of the axle  
supports are sealed. Without removing the bearings,  
but with the axle removed, rotate the inner race with  
your fingers. If any roughness is noted, replace the  
ball bearing assembly. These ball bearings are factory  
lubricated and additional lubrication cannot be added.  
When driving in these ball bearings, use the proper  
tool that drives on the outer race as shown on the  
next page.  
2. When installing open end needle bearings, always  
apply pressure to the stamped side.  
3
. Use only recommended tools to insert bearings.  
The opposite end of the same tool used for removal  
is used for replacement.  
1
. Install the needle and ball bearing combination for  
the input shaft into the cover prior to the installation  
of the input shaft.  
4
. The inside face of the bearing housing should be  
below the thrust face on the case or cover. This  
distance is controlled by the design of the inserting  
tool. By using the proper tool, the bearing will be  
protected upon installation. Bearings should be  
pressed into the cover .015'’ to .020'’ (.381-.508  
mm) below the thrust surface. The open end bearing  
in the low speed shaft of four speed transaxles is  
to be .010'’ (.254 mm) below the thrust surface.  
The open end bearing in the shifter shaft should  
be .010'’ (.254 mm) below the end as well.  
2
. Using a socket or bearing installer, install the input  
shaft ball bearing into the case by driving on the  
outer race. After the input shaft bearings are  
installed, assemble the input shaft. Press the input  
shaft into the bearing combination while supporting  
the inner race of the ball bearing on a hollow tube.  
1
18  
9
. Insert a 7/16'’ (.438 mm) metal rod into this bearing.  
With a mallet strike the rod sharply to compress  
the wet paper. Continue to add more wet paper,  
this will hydraulically lift the bearing out of the  
shaft.  
1
0.Use the authorized tool listed below to install the  
new bearing. Needle bearings in shifter shafts should  
be installed .010'’ (.254 mm) below flush.  
5
. To remove the needle bearing in the splined shifter  
shaft, proceed as follows:  
NOTE  
Blind bearing pullers are available to remove this  
bearing. There is a space between the bottom of the  
drilled hole and the inside end of the bearing to  
accommodate the ridges of the bearing puller.  
6
. With the needle bearing up, clamp the splined  
shifter shaft vertically in a soft jaw vise so the  
lower end of the shaft rests on a block of wood.  
7. Prepare some pieces of paper toweling, newspaper,  
etc. by soaking in water.  
8
. Tear paper into pieces, approximately one to two  
inches square. Stuff these wet pieces of paper  
into the needle bearings until full.  
BUSHING SERVICE  
When removing bushings, use the combined bushing  
remover and installation tool. Position the piece to be  
serviced on the table of an arbor press with an opening  
to allow the bushing to pass through.  
1. Use the proper tool as illustrated.  
2
. The bushings in the three gear cluster, four speed  
transaxle are both removed at the same time. The  
bushing from one end will contact the bushing in  
the opposite end and both may be pushed out.  
3
. Use an arbor press and push the steel ball through  
the new bushing to expand it to the required size.  
6
70234  
670207A  
670213  
6
70203  
6
70210  
6
70209  
670211  
6
70263  
6
70206  
6
70251  
6
70204  
670252  
6
70205  
PEERLESS TOOL KIT 670254A  
Tool No.  
Description  
Oil Seal Installer  
Bushing Driver and Installer  
Bushing Driver and Installer  
Oil Seal Protector  
Bearing Driver and Installer  
Oil Seal Installer  
Bearing Driver and Installer  
Oil Seal Installer  
Bearing Driver and Installer  
Bearing Driver and Installer  
Bearing Installer  
Bearing Driver  
Oil Seal Protector  
Oil Seal Protector  
Use with:  
6
6
6
6
6
6
6
6
6
6
6
6
6
6
70203  
70204  
70205  
70206  
70207A  
70209  
70210  
70211  
70213  
70234  
70251  
70252  
70262A  
70263  
Seal with 13/16" (20.64 mm) I.D.  
Bushing with 3/4" (19.05 mm) I.D.  
Busing with 1-1/2" (38.1 mm) I.D.  
Seal with 1/2" (12.7 mm) I.D.  
Bearing with 5/8" (15.87 mm) I.D.  
Seal with 21/32" (16.7 mm) I.D.  
Bearing with 1/2" (12.7mm) I.D.  
Seal with 1/2" (12.7 mm) I.D.  
Bearing with 9/16" (14.29 mm) I.D.  
Bearing with 5/8" (15.87 mm) I.D.  
Input Bearing on 800 Series  
Bearing with 11/16" (17.46 mm) I.D. - 800 Series  
All 3/4" (1.8 mm) Axle Shaft Seals  
Seal with 5/8" (15.87 mm) I.D.  
119  
CHAPTER 23. VST TROUBLESHOOTING  
The information on the following pages has been provided to help understand the internal operation of the VST.  
Do not use this information to attempt any internal repairs. Tecumseh's current policy on hydrostatic transaxles  
that have internal failures is to replace the complete unit. This has not changed. However, we would like to  
provide a failure checklist to assist in making an accurate evaluation of the complete tractor to eliminate any  
unnecessary replacements. Here is a list of items to check and corrective actions to take.  
To properly test the unit for power loss.  
1.  
2.  
3.  
4.  
Allow the unit to cool before trying the following steps.  
Put the shift lever in a position that is 1/2 (12.7 mm) of the travel distance from neutral to forward.  
Place the tractor on a 17 degree grade.  
Drive the tractor up the grade (without the mower deck engaged). The loss of power experienced should  
be approximately 20%. This is considered normal. If the loss of power is approximately 50%, this would  
be considered excessive.  
5.  
Bring the unit to neutral, shift into forward and note the response. Care should be taken to move the  
lever slowly to avoid an abrupt wheel lift.  
To determine if the problem is with the hydro unit, all external problem possibilities must be eliminated. Here  
are some potential problem areas.  
1.  
Overheating: Heat can cause a breakdown in the viscosity of the oil which reduces the pressure used  
to move the motor. Remove any grass, debris, or dirt buildup on the transaxle cover and/or between the  
cooling fins and fan. Buildup of material will reduce the cooling efficiency.  
2.  
Belt slippage: A belt that is worn, stretched, or the wrong belt (too large or wide) can cause belt  
slippage. This condition may show the same loss of power symptom as overheating. Typically, the unit  
which has a slipping belt will exhibit a pulsating type motion of the mower. This can be verified visually  
by watching the belt and pulley relationship. If the belt is slipping, the belt will chatter or jump on the  
pulley. If the belt is good, a smooth rotation will be seen. Replace the belt and inspect the pulley for  
damage.  
3.  
Leakage: The VST and 1800 Series have two oil reservoirs which can be checked for diagnostic  
purposes. The first is the pump and motor expansion bellows, With a small diameter blunt or round  
nose probe, check the bellows depth through the center vent hole. Proper depth from the edge of that  
hole is 3-1/4 - 3-1/2 inches (8.25 - 8.9 cm).  
The second chamber is for the output gears including the differential. FIRST make sure the tractor is  
level, then remove the drain/fill plug. NOTE: Some units that do not have differential disconnect will have  
two plugs. We recommend using only the primary plug. Insert a small pocket rule until you touch the  
bottom of the case. Remove it and check for 1/4 - 3/8 inches (6.5 - 9.5 mm) contact; this is full at its 8  
oz. (236 ml) capacity.  
1
20  
4.  
Low ground speed: If the linkage is not synchronized to absolute neutral, or the shift lever is not  
properly fastened to the tapered control shaft, full forward travel may not be achieved. This may cause  
a false reading and be misdiagnosed as a low power condition. This also could be caused by the brake  
not releasing.  
To determine absolute neutral, the hole in the tapered control shaft must face straight up and down. At  
this point make sure the OEM linkage is in neutral. To properly fasten the control lever to the shaft,  
torque the nut to 25-35 ft. lbs. (34 - 48.3 Nm) with the shaft and the lever in neutral.  
When attaching the shifter arm to the shaft you must prevent any rotation during torquing. This can be  
done by placing a long 5/16" (7.94 mm) bolt in the hole as shown in illustration. Hold the bolt until the  
tapers are locked and the nut torque is correct.  
To make sure that the brake is not binding, drive the unit up a slight grade. Position the speed control  
lever into neutral. The unit should coast backwards. If the unit does not coast back slowly, the brake is  
not released from the brake disk. Adjust the brake linkage to release the brake completely when the  
foot pedal is released.  
5.  
Hard to shift: Typically, hard to shift symptoms are not caused by the hydrostatic unit. The shift arm  
should move with relative ease. Check the ease of movement of the shift arm with a torque wrench. For  
the following spec numbers, the reading should be 40-65 inch lbs (4.5-7.34 mm). measured at the end  
of the shaft (205-006, 016, 021, 022, 030, 033, 036, 040, 046). If the model has a neutral spring, the  
torque reading should be 70-150 inch lbs. (7.9-16.9 mm). All other models (without neutral return  
spring) should read 150 - 120 inch lbs. (13.5-16.9 mm) measured at the end of the shaft. Binding may  
occur in the linkage connections due to rust or moisture. Lubricating these connections and checking  
for bent or damaged parts should resolve hard shifting.  
PRODUCT CONTAINS PATENTED FEATURES  
o
0 from case/cover  
parting line is  
9
o
neutral  
0
9
Parting  
Line  
DIRECTION CONTROL SHAFT  
DIRECTION CONTROL LEVER  
POCKET RULE  
FOR OIL CHECK  
PUSH NUT  
SQUARE CUT "O" RING  
3
1
/8" (9.53 mm)  
/4" (6.35 mm)  
DIFFERENTIAL  
DISCONNECT HOOKUP  
3
¼" (82.5 mm)  
3
½" (88.9 mm)  
EXPANSION BELLOW'S  
CHECK COLD FOR CORRECT DEPTH  
NOTE: The above illustration is of a foot control unit with differential disconnect. Consult your parts list by model  
and specification number to get correct parts for your unit. ALL PARTS SHOWN MAY NOT BE ON YOUR UNIT.  
121