CODE: ST-172
DATE: February 19, 2002
Service Kit
753-04027
SUBJECT: Electric to Manual Chute
Rotation Conversion
MODELS 2 Stage Walk Behind Snow
AFFECTED: Throwers with Electric Chute
Crank Feature.
Use this service kit when it is desired to replace the Electric Chute Rotation feature with a Manual Chute Rotation.
IMPORTANT: Do not remove or disconnect the electrical harness or the switches for chute rotation and heated hand. The
heated hand grips feature will not be affected by this change.
Typical Installation Time: 45 Minutes
14
Service Kit Contents
REF. PART
NO. NUMBER
QTY
DESCRIPTION
16
16
12
10
1
1
2
3
4
684-0053B-
637
705-5266-
637
747-0737-
637
784-5647-
637
1
1
1
1
Crank Assembly, Chute, Lower
(Powder Black)
4
0
Bracket (Upper), Crank, Chute
(Powder Black)
0
Crank, Chute, Upper
(Powder Black)
Bracket, Crank, Chute
0
6
0
5
6
7
8
9
710-3015
714-0104
714-0145
720-0201A
726-0100
736-0185
736-0270
741-0475
712-3027
712-3010
710-0451
736-0242
726-0240
7
1
1
1
1
2
2
2
7
2
2
2
3
Screw, Hex Hd 1/4”-20 x .75” Lg. Gr 5
Pin, Cotter, Internal
Pin, Cotter, Internal
1
5
Knob, Crank, Chute
Cap, Push
13
1
3
5
11
1
0
Washer, Flat .406 ID x .75 OD x .060
Washer, Bell .250 ID x .75 OD x .060
Bushing, Plastic .380 ID
Nut, Lock, Hex Flange 1/4” -20
Nut, Hex 5/16”-18
12
17
2
11
1
1
1
1
1
1
2
3
4
5
6
7
8
Bolt, Carriage 5/16”-18 x .75” Lg
Washer, Bell .343 ID x .875 OD x .06
Tie, Plastic
9
11
7
3
5
9
Electric Motor Removal:
Refer to your Owner’s Manual to identify snow thrower com-
ponents referred to in the following instructions. Compo-
nents removed that are designated with an asterisk ( * ) may
be discarded or saved at your discretion.
FIGURE 1
. Remove the two bolts* that attach the motor bracket to the
Chute Adapter.
. Remove the two hex nuts and lock washers that hold the
4
5
NOTE: Before proceeding - Disconnect the booted wire
from the spark plug and ground to the engine block.
metal motor mounting bracket to the auger housing’s
threaded studs. Remove the electric motor* and bracket*.
1
.Remove the two (2) screws* that hold the plastic cover
over the electric motor. Remove the cover*.
.Disconnect the electrical connector from the electric
motor.
. Re-route the electric motor harness up along the main
6. Remove the six (6) 1/4”-20 hex nuts* and 1/4”-20x .75 hex
screws* that hold the ring gear assembly and Lower Chute
Flange Keepers to the Lower Chute. Remove the ring gear*.
Retain the Lower Chute and three Lower Chute Flange
Keepers.
2
3
harness running from the right side of the frame up towards
the handle panel. Ensure that the loose connector end is
protected up under the handle panel and not in contact with
any metal hardware. Secure with Tie Wraps, Item 17. See
Figure 1.
7. This completes the removal of the electric motor chute
crank hardware.
Service Kit 753-04027
Page 1 of 2
Form No. 769-00077
02/2002)
(
MTD Form
9
- 14
Manual Chute Crank Installation:
. Clean the mating surfaces of the Chute Adapter and Lower Chute.
Refer to Figures 2 & 3.
. Place the Lower Chute over the Chute Adapter opening with the
Lower Chute’s opening toward the front of the unit.
. One at a time, place the three (3) Lower Chute Flange Keepers,
1
1
4
CHUTE
ADAPTER
12
2
16
3
removed in Step 6 above, beneath the lip of the Lower Chute. Place
the Keeper’s flat side facing down. The stepped side of the Keeper
catches under the lip on the Chute Adapter. Align the two holes in the
Keeper with a pair of holes in the Lower Chute.
4
4. Attach each Keeper with two (2) Hex Hd Screws, Item 5, and Hex
Flange Lock Nuts, Item 13. The Hex Hd Screws are placed from the
underside up through the Keepers then through the Lower Chute.
CAUTION: DO NOT OVER TIGHTEN SO THAT PLASTIC LOWER
CHUTE OR LOWER CHUTE FLANGE KEEPERS ARE DEFORMED.
15
5. Refer to Figure 2. Attach Chute Crank Bracket, Item 4, to the slot-
ted flange on the Chute Adapter with two (2) Carriage Bolts, Item 15,
Bell Washers, Item 16, and Hex Nuts, Item 14. Tighten finger tight
only.
FIGURE 2
6
. Insert a Bushing, Item 12, into the hole in the Chute Crank Bracket
Upper), Item 4. See Figure 2.
. Refer to Figure 5. Place the Chute Crank Knob, Item 8, over the
(
LOWER CHUTE
7
short end of the Upper Chute Crank, Item 3. Ensure that the recessed
end of the Knob faces the two bosses on the Upper Chute Crank,
Item 3. Secure with Push Cap, Item 9.
8
. Press the second Plastic Bushing, Item 12, into the Chute Crank
Bracket (Upper), Item 2.
. Attach Chute Crank Bracket (Upper) with Bushing subassembly to
the left rear slotted hole in the Handle Panel’s metal frame with one
13
9
(
1) Hex Head Screw, Item 5, two (2) Bell Washers, Item 11 and one
1) Hex Nut, Item 13. See Figure 4. Tighten finger tight only.
LOWER CHUTE
FLANGE KEEPER
(
1
0. Place Upper Chute Crank Subassembly through the Bushing in
the Chute Crank Bracket (Upper).
1. Assemble the Upper Chute Crank Subassembly to the Lower
1
5
Chute Crank Assembly, Item 1, and secure with Internal Cotter Pin,
Item 7.
FIGURE 3
12. Place one (1) Flat Washer, Item 10, on the spiral end of the Lower
Chute Crank. Place the Lower Chute crank into the Plastic Bushing,
Item 12, in the Chute crank Bracket, Item 4, attached to the Chute
Adapter.
13
9
11
8
HANDLE
PANEL’S
METAL
13. Place the second Flat Washer, Item 10, on the end of the Lower
11
Chute Crank. Secure the Lower Chute Crank to the Chute Crank
Bracket with Internal Cotter Pin, Item 6.
FRAME
5
2
3
There should be a flat washer on each side of the plastic bushing.
Adjusment of Manual Chute Crank:
UPPER CHUTE CRANK
SUBASSEMBLY = 3,8 & 9
1. Position the Chute Crank Bracket, Item 4, so that the spiral on the
A
Lower Chute Crank, Item 1, fully engages the slots on the Lower
Chute. Tighten the two (2) Hex Nuts, Item 14. See Figure 2.
1
7
2
. Align the Chute Crank Bracket (Upper), Item 2, so that the Chute
1
0
Crank rotates freely. Tighten the Hex Nut, Item13, at the slotted hole
in the handle panel metal under structure.
A
1
0
6
3. Rotate chute in both directions. Ensure that spiral does not disen-
gage from Lower Chute’s teeth (slots). Readjust Chute Crank Bracket
as necessary.
FIGURE 4
Service Kit 753-04027
Page 2 of 2
Form No. 769-00077
02/2002)
(
MTD Form
9
- 15
