MTD 31A Series Snow Blower Parts Lookup Diagram

Specified snow blower models under brands including: 
Bolens
Columbia
Cub Cadet
Huskee
MTD
MTD Gold
Troy-Bilt
Yard Machines
Yard-Man
Other brands as per model number

31AH5GLG 634-04145 16 x 4.8 x 8 LH X-Trac 734-2038 634-04173 738-04180
31AH5KLH 634-04146 16 x 4.8 x 8 RH X-Trac 734-2038 634-04173
31AE6GLF
31AH6GLF
31AH6KLG
31AH6GLN
31AE5MLP 634-04136 16 x 6.5 x 8 LH X-Trac 734-2031 634-04174 738-04180
31AE5MLH 634-04137 16 x 6.5 x 8 RH X-Trac 734-2031 634-04174 738-04180
31AH5IQ4
31AH5MLH
31BE6MLO 634-04136 16 x 6.5 x 8 LH X-Trac 734-2031 634-04174 738-04168
31AE6MLG 634-04137 16 x 6.5 x 8 RH X-Trac 734-2031 634-04174 738-04168
31AE6LLG
31AA6AHE 634-04144A 13 x 4 Snow Hog 734-1732 634-04172A 738-04168
31AE5GKF 634-04141 16 x 4.8 Snow Hog 734-1530 634-04173 738-04168
31AE5KLF
31AE6FHF
31AS6LCG
31AS6LEF
31AE6GKF
31AE6GKG
31AH6KLG
31AE6MKH
31AE6FHF
31AE6LHG
31AE6LKG
31AS6LCG
31AS6FEE 634-04142A 15 X 5 Snow Hog 734-1859 634-04151A 738-04168
31AE6MKH 634-04135 16 X 6.5 Snow Hog 734-1525 634-04174 738-04168
31AE6LHH
31AH6DQ3 634-04147A 15 X 5 X 6 LH X-Trac 734-04012 634-04172A 738-04168
634-04148A 15 X 5 X 6 RH X-Trac 634-04172A

AUGER HOUSING COMPONENTS

22 684-04067 711-04286 790-00117 618-04170 N/A
24 684-04069 711-04285 790-00120 618-04171 731-04870 (1)
26 684-04071 711-04284 790-00121 618-04172 731-04870 (2)
26 684-04072 711-04284 790-00121 618-04172 731-04870 (2)
28 684-04073 711-04283 790-00118 618-04173 731-04870 (3)
28 684-04074 711-04283 790-00118 618-04173 731-04870 (3)
30 684-04063 711-04282 790-00119 618-04165 731-04871 (2)
30 684-04075 711-04282 790-00119 618-04165 731-04871 (2)

Frame and Chute Assembly

1 731-04131A Lower Chute (2 Way)
2 731-04861A Lower Chute (4 Way) 
3 684-04117A 2 Way Chute Control Assembly
4 684-04116B 4 Way Chute Control Assembly
5 710-0262 Carriage Bolt 5/16-18 x 1.50 Gr. 2
6 710-04071 Carriage Screw 5/16-18 x 1.0
7 710-04187 Hi-Lo Screw 1/4-15 x .5
8 710-0276 Carriage Bolt 5/16-18 x 1.00" Lg
9 738-04194 Shoulder Screw .312 x 1.7:1/4-20
10 710-0895 Hex Tap Screw 1/4 x .75" Lg
11 711-04469A Clevis Pin 3/8 x 1.87
12 714-04040 Bow Tie Cotter Pin
13 712-04063 Flange Locknut 5/16-18 Gr. F Nylon
14 712-03087 Wing Nut 1/4-20
15 731-04425A Upper Chute w/Export Label
16 731-1313C Cable Guide 
17 731-04869 Chute Flange Keeper
18 738-04135 Shoulder Screw .25 x .50:10-24
19 741-0475 Plastic Bushing .380 ID
20 749-04155 Chute Support Tube
21 784-5594 Cable Bracket Chute Tilt
22 712-04064 Hex L-Flanged Nut 1/4-20 Gr. F Nylon
23 784-5647 Chute Crank Bracket Support
24 790-00131 Bracket: Chute Control 
25 736-0159 Flat Washer .349 ID x .879 OD x .063
26 684-04162A Support Bracket
27 710-04187 Hi-Lo Screw 1/4-15 x .50
28 710-0606 Hex Hd. Cap Screw 1/4-20 x 1.5 Gr. 5
29 710-0627 Hex Hd. Cap Screw 5/16-24 x .75
30 736-0463 Flat Washer .25 ID x .63 OD x .0515
31 712-04064 Flange Locknut 1/4-20 Gr. F, Nylon
32 720-04039 Knob
33 731-05307 Control Cover - 2 Way
35 736-0413 Spring Washer .390 x .625 x .012
36 738-04185 Flange shoulder Spacer .310 x .995 x 1/4-20
37 746-04238 Cable - 2 Way
38 790-00200 Mounting Bracket - 2 Way
39 790-00210 Lever - 2 Way
40 731-04889 Joy stick Pulley
41 746-04166 Chute Rotation Cable
42 710-04352 Plastite Screw #6 x .375
43 710-04353 Plastite Screw #8 x 1.00
44 731-04891 RH Control Knob
45 731-04892 LH Control Knob
46 684-04115 Tube & Bracket. Lever Assembly
47 731-04893 Plunger
48 731-04904 RH Trigger Control Knob
49 731-04905 LH Trigger Control Knob
50 731-04910 Trigger Lever
51 746-04164 Detent Cable
52 731-04888 Control Head Housing LH
53 731-04887 Control Head Housing RH
54 710-04353 Screw #8 x 1.0 Plastite
55 731-04889 Joy stick Pulley
56 710-0451 Carriage Bolt 5/16-18 x .75
57 731-04354A Upper Chute
58 731-04869 Chute Flange Keeper
59 731-04912A Lower Chute
60 720-04072 Handle Knob Assembly

Engine and Chassis

1 656-04025A Friction Wheel Disc Assembly
2 684-04153 Friction Wheel Assembly, Bearing 5.5 OD
3 684-04154 Friction Wheel Support Bracket Assembly
4 684-04156 Shift Rod Assembly
5 710-0627 Hex L-Bolt 5/16-24 x .75 Gr. 5
6 710-0788 Hex Bolt 1/4-20 x 1.00
7 710-1652 Hex Wash Hd TT Scr. 1/4-20 x .625
8 712-04065 Flange Lock-Nut 3/8-16 Gr. F Nylon
9 712-0413 Jam L-Nut 5/8-18 Gr. 5 Nylon
10 714-0126 #9 HI-Pro Key 3/16 x 3/4 Dia.
11 716-0104 Retaining Ring
12 716-0136 Retainer Ring
13 716-0231 “E” Ring
14 717-04209 Hex Shaft .8125 - 7 tooth
15 717-04230 Gear - 80 Tooth
16 726-0221 Cap Speed Nut 1/4 Rod
17 732-0264 Extension Spring 3/8 OD x 2.50
18 736-0242 Cupped Washer .345 ID x .88 OD x .060
19 736-0287 Flat Washer .79 ID x 1.25 OD x .06
20 736-04161 Flat Washer .75 x 1.00 x .06
21 737-0288 Grease
22 737-04027 Lubricant Industrial LPS 2
23 738-04184A Shoulder Screw .373 x .105:TT 1/4-20
24 738-0924A Hex Shld.Scr.1/4-28 x .375
25 741-0245 Hex. Flange Bear ing.751" ID
26 741-0563 Ball Bearing w/snap ring
27 746-04229 Drive Clutch Cable 44.83" Lg.
28 746-04230 Auger Clutch Cable 47.23" Lg.
29 748-0190 Spacer .513 ID x 1.0
30 756-0625 Cable Guide Roller
31 790-00096 Auger Cable Guide Bracket
32 790-00180 Frame
33 790-00206A Guide Bracket - Auger Cable
34 790-00207A Guide Bracket - Drive Cable
35 790-00226 Frame Cover
36 731-04873 Spacer
37 738-04168 Axle .75 x 22" Lg.
38 See chart on page 23.
39 684-04169 Idler Pulley Assembly 1.917 OD 
40 710-0809 Hex Screw 1/4-20 x 1.25
41 710-0191 Hex Screw 3/8-24 x 1.25
42 710-0672 Hex Hd Cap Scr. 5/16-24 x 1.25 Gr. 5
43 710-0654A Hex Wash HD Tap Screw 3/8-16 x .88
44 710-1245B Hex Bolt 5/16-24 x 0.875
45 710-1652 Hex Wash Hd TT Scr. 1/4-20 x .625
46 712-04064 Hex L-Flanged Nut 1/4-20 Gr. F Nylon
47 726-04012 Push Nut Écrou à enfoncer
48 731-04792A Belt Cover
49 732-04308A Torsion Spring .850 ID x .354" Lg.
50 736-0247 Flat Washer .40 ID x 1.25 OD x .160
52 736-0505 Flat Washer .34 x 1.50 x .150
53 737-0318 Grease: Arctic: EP NLGI 1-58F
54 748-04053 Pulley Adapter
55 748-04097 Shoulder Spacer
56 750-04303 Spacer .875 ID x 1.185 OD
57 750-04477 Spacer .340 x .750 x .360" Lg.
58 754-04050 Belt .5 x 35.0" Lg.
59 754-04088 Belt 33.0" Lg.
60 756-04109 Auger Pulley
61 756-04113 Pulley Half
62 756-04179 Pulley Half 1/4 V x 1.5 OD
63 790-00208 Wheel Drive Idler Bracket
64 710-0751 Hex Bolt 1/4-20 x .62 Gr. 5
65 712-04063 Flange Locknut 5/16-18 Gr. F, Nylon
66 735-04054 Friction Wheel Rubber Roue du friction en caoutchouc
67 732-04311 Torsion Spring .750 ID x .968" Lg.
68 738-04184A Shoulder Screw .373 x .105:TT 1/4-20
69 790-00156 Shift Spacer Bracket
70 790-00217A Pivot Bracket
71 790-00218A Shift Bracket
72 790-00174 Friction Plate
73 748-04112 Shoulder Spacer .3175 x .5 x .1025
74 750-04571 Spacer
75 790-00289 Cover Plate (optional)

Auger and Housing Assembly

1 731-2643 Clean-Out Tool
2 684-04057 Impeller Assembly
3 710-0347 Hex Screw 3/8-16 x 1.75
4 710-0451 Carriage Bolt 5/16-18 x .75
5 710-0703 Carriage Screw 1/4-20 x .75 Gr. 5
6 710- 0604A Hex HD AB Tap Screw 5/16-18 x .625
7 712-04063 Flange Locknut 5/16-18 Gr. F Nylon
8 712-04064 Hex L-Flanged Nut 1/4-20 Gr. F Nylon
9 712-04065 Hex L-Flanged Nut 3/8-16 Gr. F Nylon
10 725-0157 Cable Tie
11 731-04871 Spacer 1.25 x .75 x 3/16" Lg.
12 726-04012 Push-on Nut .25 dia.
13 731-04705 Chute Adapter
14 732-0611 Extension Spring
15 736-0174 Wave Washer .660 ID x .88 OD x .010
16 731-02635 Cleanout Tool Mount
17 738-0143 Shoulder Screw .500 Dia. x .335" Lg.
18 738-0281 Shoulder Screw .625 Dia x .170
20 741-0245 Hex. Flange Bearing. .751" I.D.
21 741-0309 Self-aligning bearing
22 756-0981B Flat Idler Pulley 2.75" OD
23 790-00075 Bearing Housing 1.85 ID
24 790-00080A Auger Idler Brake Bracket
26 See chart on page 23.
27 684-04107 Spiral Assembly LH
28 684-04108 Spiral Assembly RH
29 714-04040 Bow Tie Cotter Pin
30 See chart on page 23.
31 736-0188 Flat Washer .760 ID x 1.49 OD
32 738-04124A Shear Pin .25 x 1.5 Gr. 2
33 741-0493A Flange Bushing
34 790-00087A Bushing Housing
790-00138A Bushing Housing (w/grease fitting hole)
35 See chart on page 23.3.
36 710-1260A Hex Wash HD AB Tap Screw 5/16-18 x .75
37 734-0242 Cupped Washer .340 x 872 x .060
38 790-00181 Drift Cutter - Optional
39 790-00091 Reversible Slide Shoe
40 737-3000 Grease Fitting (optional)
41 731-04870 Spacer 1.25 x .75 x 1.00
42 741-0661A Flange Bear ing.75 ID x 1.0 OD x .975
43 746-0897 Auger Clutch Cable (w/"Z" fitting)
44 784-5580 Slide Shoe
45 719-0319 RH Reduced Auger Housing
46 719-0320 LH Reduced Auger Housing
47 721-0179 Oil Seal 3/4 ID
48 741-0662 Flange Bearing .75 ID x 1.00 OD x .50
49 710-0642 Thread Forming Screw 1/4-20 x .75
50 See chart on page 23.
51 714-0161 Hi Pro Key 3/16 x 5/8
52 715-04021 Dowel Pin .25 OD x 1.22
53 717-04126 Worm Shaft .75 OD
54 717-0528A Worm Gear 20T
55 718-04071 Thrust Collar
56 721-0325 Plug, 1/4 x .437
57 721-0327 Oil Seal .75 x 1 x .131
58 736-0351 Flat Washer .76 ID x 1.5 OD x .03
59 736-3084 Flat Washer .510 x 1.120 x .060
60 741-0663 Flange Bearing .75 ID x 1.0 OD x .925

Handles Styles H, K ,L, P and Q

1 631-04180 Handle Panel Assembly - Yellow
1 631-04185 Handle Panel Assembly - Black
1 631-04183 Handle Panel Assembly-Black w/Chute Control
2 631-04133 LH Clutch Lock Handle Assembly
3 631-04134A RH Clutch Lock Handle Assembly
4 684-04105A Engagement Handle Assembly LH
5 684-04106B Engagement Handle Assembly RH
6 710-04326 Screw #8-16 x .50
7 710-04354 Screw 1/4-20 x .375
8 710-0837 Oval HD C-Sunk Screw #10 x 5/8
9 710-04586 Hex TT-Tap Screw 1/4-20 x 1.625
10 710-1233 Oval C-Sunk Hd Screw 10-24 x 1.375 
11 711-04287 Pivot Rod
12 710-0224 Screw #10-16 x .50
14 712-04064 Hex L-Flanged Nut 1/4-20 Gr. F Nylon
15 712-04081A Hex Shoulder Nut 1/4-20
16 714-0104 Int. Cotter Pin .072 x 1.13" Lg.
18 720-0274 Grip
19 720-04039 Shift Knob
19 720-04045 Shift Knob - Yellow
20 725-04213 Lamp #1295 (w/heated grips)
725-1629 Lamp 
21 725-04214 Wire Harness
22 725-04216A Heated Grip Wire
23 725-1649 Socket
24 725-4393 Switch
25 725-1757 Heated Grip
26 726-0470 Cable Tie 19 x 8.39" (w/plug)
725-0157 Cable Tie (w/heated grips)
27 731-04894B Lock Plate
28 731-04896A Clutch Lock 
29 732-0193 Compression Spring .38 ID x .88 Lg
30 732-04219A Spring: Clutch Lock
31 732-04238 Torsion Spring .8156 x .3038 
32 735-0199A Rubber Bumper 
34 736-0267 Flat Washer .38 ID x .87 OD x .09
35 738-04122 Shoulder Screw 1/4-20 x 1.345 
36 738-04125 Shoulder Screw .374 Dia. x 1.05 Lg.
38 746-04227A Selector Speed Cable
39 746-0605 Cable Barrel Holder 
40 790-00203 Shift Lever
41 790-00248 Panel Support 
43 710-0449 Carriage Bolt 5/16-18 x 2.25
44 747-04263 Chute Crank Eye Bolt Special
45 720-0201A Knob 1.0 x 3.2 
46 726-0100 Push Nut 3/8" Rod 
47 735-0234 Grommet 
48 684-04104 Chute Crank Assembly 
49 736-0185 Flat Washer .406" I.D. x .75" O.D. 
50 631-04181 Handle Panel Assembly - Troy-Bilt 
51 749-04142 Upper Handle LH 
51 749-04191 Upper Handle LH (Heated Grips) 
52 749-04141 Upper Handle RH
52 749-04190 Upper Handle RH (Heated Grips)
53 720-04072 Handle Knob Assembly
55 710-1260A Hex Wash HD Lo Tap Screw 5/16 x .75 
56 749-04138 Lower Handle
57 716-04036 E Ring
58 725-0157 Cable Tie
59 731-04913 Steering Control
60 738-04126 Pin 3/16



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