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Ace by MTD 122-478R033 (1992) Self-Propelled Walk-Behind Mower

Model: 122-478R033 (1992)

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Deck And Front Wheel Assembly

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1
Torx Mach. AB-Tap Scr. 1/4 x .62" Lg. MTD-710-1017

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2
Height Adjustment Support MTD-721-0216

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3
Height Adjustment Plate MTD-17323

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4
L-Wash. 1/4" I.D. For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part number and size as shown on parts list. MTD-936-0329

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6
Height Adj. Connecting Rod MTD-747-0699

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7
Cotter Pin 3/32" Dia. MTD-714-0507

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8
Front Axle Ass'y. MTD-17022-0637

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9
Hex L-Wash. Hd. AB-Tap Scr. 1/4 x .38" Lg. MTD-710-0352

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10
Extension Spring 2.39" Lg. MTD-732-0589

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11
Bell-Wash..380" I.D. x .88" MTD-736-0105

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12
Flange Ball Bearing 1/2" I.D. MTD-NA

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13
Hub Cap (See Below) MTD-NA

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xx

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xx
Hub Cap (Beige) MTD-731-0982C

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Hub Cap Gray (3-1/2" Dia.) MTD-920-0249

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Black (1-1/2" Dia.) MTD-720-0251

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Red (1-3/8" Dia.) MTD-731-0342

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14
Wheel Ass'y. Comp.- Front MTD-NA

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8" x 1.75" Bar Tread Not Required MTD-634-0020

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8" x 1.75" "T" Tread MTD-734-1268

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xx
Front/Rear Wheel 8" x 2" "S" Wave MTD-734-1826

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Wheels - Front MTD-753-08093

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8" x 2" "S" Wave MTD-734-1517B

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xx
Fl-Ball Brg. 1/2" I.D. MTD-941-0180

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xx
Fl-Ball Brg. 1/2" I.D. MTD-941-0180

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xx
Fl-Ball Brg. 1/2" I.D. MTD-941-0180

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15
Shld. Bolt .498" Dia. x 1.45" MTD-738-0102

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16
Wave Wash..53" I.D. x .78" MTD-736-0232

Handle And Engine Assembly

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1
Std. Control Handle MTD-747-0748

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2
Hex Lock Nut 1/4-20 Thd. MTD-712-0324

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3
FOAM GRIP - 9" (Optional) MTD-720-0294A

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4
Spr. Wash..66" I.D. MTD-936-0501

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5
Hex L-Nut 1/4-20 Thd. MTD-712-0291

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6
Throttle Cable - 55" (B&S) MTD-946-0671A

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6
Throttle Cable - 45" (Tecumseh) MTD-946-1115

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7
Throttle Box Comp. (Incl. Ref. 3, 4, 5, 24, 25) MTD-811-0185

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8
Throttle Lever MTD-946-0876

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9
Throttle Body MTD-946-0875

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10
Oval C-Sunk Scr. MTD-710-0605

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11
Control Cable - 40.5" (B&S) MTD-946-0554

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11
Control Cable - 55" (Tecumseh) MTD-946-0555

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12
Upper Handle MTD-749-0439E-0637

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13
Rope Guide MTD-710-1205

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14
Bell-Wash. 7/8" I.D. (Used w/Keyed Adapter) MTD-736-0473

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14
Bell-Wash. 1.01" I.D. (Used w/Splined Adapter) No Longer Available MTD-736-0450

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15
Curved Carriage Bolt 5/16-18 x 1.38" Lg. No Longer Available MTD-710-0671

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16
Bowed Washer MTD-936-0286

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17
Hex Bolt 3/8-24 x 1" Lg. MTD-710-1055

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18
Cable Tie MTD-725-0157

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19
L-Wash. 5/16" I.D. For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part number and size as shown on parts list. MTD-936-0119

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20
HEX NUT 5/16-18 For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part number and size as shown on parts list. MTD-712-3010

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21
Lower Handle MTD-749-0907B

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22
Hub Cap (Optional) MTD-10647

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23
Pan Hd. Tap Scr. #12 x .50" Lg. (Used w/Ref. #22) MTD-710-0748

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24
SPRING WASHER BELL MTD-736-0270

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25
Bag Handle For models 460R thru 468R Only. MTD-731-0801

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26
Rear Catcher Frame For models 460R thru 468R Only. MTD-749-0764A-0637

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27
Front Catcher Frame For models 460R thru 468R Only. MTD-764-0412-0637

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28
Spark Plug Boot (Optional) No Longer Available MTD-735-0639

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?29
Engine MTD-NA

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30
Control Cover Half - Upper MTD-753-0833

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31
Control Cover Half - Lower MTD-753-0833

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32
Control Lever MTD-731-0620A

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33
Drive Cable - 51" Lg. MTD-946-0711B

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34
Flat C-Sunk Hd. Tap Scr. #10 x .75" Lg. MTD-710-0841

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35
Cable Mtg. Cap MTD-753-0833

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36
Hardtop Bag Cover For models 470R thru 478R Only. MTD-631-0003

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37
Hardtop Handle For models 470R thru 478R Only. MTD-631-0003

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38
Grass Bag For models 470R thru 478R Only. MTD-964-0252

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39
Truss Mach. Scr. 1/4-20 x 1.0" Lg. MTD-710-0166A

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40
Hex Nut 3/8-24 Thd. For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part number and size as shown on parts list. MTD-712-0241

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?41
Fl-Wash. .280" I.D. x .620" O.D. For models 470R thru 478R Only. MTD-736-0463

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42
Hex Nut 1/4-20 Thd. For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part number and size as shown on parts list. MTD-912-0287

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43
Front Catcher Frame For models 470R thru 478R Only. MTD-764-0411-0637

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44
Rear Catcher Frame No Longer Available For models 470R thru 478R Only. MTD-749-0736A

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45
Chute Deflector MTD-931-0859A

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46
Deflector Plug MTD-731-0970B

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47
Seal - Extrusion MTD-731-0858

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49
Spring Lever MTD-732-0580

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50
Torsion Spring - R.H. MTD-732-0578B

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51
Torsion Spring - L.H. No Longer Available MTD-732-0577A

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52
Spacer 255" I.D. MTD-750-0566A

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53
Handle Brkt. Ass'y.- L.H. No Longer Available MTD-12297A

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54
Hinge Pin 17.75" Lg. MTD-747-0698B

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55
Cap Speed Nut MTD-926-0106

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56
SHOULDER PIN 3/8-24X1.43 MTD-711-0805

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57
L-Wash. 3/8" I.D. For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part number and size as shown on parts list. MTD-736-0169

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58
Hex Jam Nut 3/8-24 Thd. MTD-712-0711

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59
Hex L-Nut 3/8-24 Thd. MTD-912-0296

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60
Bell-Wash..38" I.D. x .88" MTD-736-0105

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61
Hex Wash. Hd. Tap Scr. 1/4-20 x 1.5" Lg. MTD-710-0778

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62
Hex L-Wash. Hd. Scr. 3/8-16 x 1" Lg. MTD-710-0654A

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63
21" Deck Ass'y. *CHOOSE COLOR WHEN ORDERING* MTD-16997B

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64
Handle Brkt. Ass'y.- R.H. MTD-12296B-0637

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65
Hex L-Wash. Hd. AB-Tap Scr. 1/4 x .62" Lg. MTD-910-0892

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66
Hex Wash. Hd. Tap Scr. 3/8-16 x .75" Lg. MTD-910-1006

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67
Hex Wash. Hd. Tap Scr. 1/4-20 x .5" Lg. MTD-710-0599

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68
Spacer 383" I.D. MTD-950-0736

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69
Crankshaft Spacer (Keyed) MTD-748-0358

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69
Crankshaft Spacer (Splined) No Longer Available MTD-748-0332

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70
Pulley Half - Lower (Keyed) No Longer Available MTD-756-0961

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71
Pulley Half - Upper (Keyed) MTD-756-0962

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71
Pulley Half - 2 Req'd. (Used w/Splined Adapter) MTD-956-0502

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72
21" Blade MTD-942-0621

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73
Bell-Wash. .396" I.D. x 1.14" O.D. (Used w/Keyed Adapter) MTD-736-0452

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73
Bell-Wash..46" I.D. (Used w/Splined Adapter) MTD-936-0453

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74
Hex Bolt 3/8-24 x 1.5" Lg. (Used w/Keyed Adapter) MTD-710-1044

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74
Hex Bolt 7/16-20 x 1.5" Lg. (Used w/Splined Adapter) MTD-710-0757

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75
Blade Adapter Kit (Keyed) MTD-753-0484

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75
Blade Adapter Kit (Splined) MTD-753-0485

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76
L-Wash. 1/4" I.D. For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part number and size as shown on parts list. MTD-936-0329

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77
Hex Jam Nut 1/4-20 Thd. MTD-912-0298

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78
Hex Bolt 1/4-20 x .85" Lg. MTD-710-3015

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79
Rear Belt Baffle No Longer Available MTD-17013

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80
CARRIAGE BOLT 1/4-20X.50" For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part number and size as shown on parts list. MTD-710-05177

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81
Rear Panel Baffle No Longer Available MTD-17006

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82
Corner Plug No Longer Available MTD-731-0931

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83
Torx Mach. AB-Tap Scr. 1/4 x 62" Lg MTD-710-1017

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84
Hex B-Tap Scr. 1/4 x .38" Lg. MTD-710-0352

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85
Rear Flap MTD-731-0669

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86
Rear Chute Baffle MTD-17008-0637

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87
Retaining Strip No Longer Available MTD-14847

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88
Hub Cap Gray (5-1/2" Dia) MTD-731-0981C

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88
Hub Cap Beige (5-1/2" Dia.) MTD-731-0982C

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88
Hub Cap Gray (3-1/2" Dia.) MTD-920-0249

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88
Hub Cap Black (1-1/2" Dia.) No Longer Available MTD-720-0251

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88
Hub Cap Red (1-3/8" Dia.) No Longer Available MTD-731-0342

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89
Spring - Nylon MTD-10622B

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90
Pawl .345" I.D. MTD-948-0188B

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91
Weld Top L-Nut 1/4-20 Thd. (Used w/Ref. #88) MTD-712-0414

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92
Hex Ins. L-Nut 1/4-20 Thd. (Used w/Ref. #22) MTD-712-0324

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93
Cotter Pin 1/8" Dia. x 1" Lg. MTD-714-0115

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94
Ratchet Wheel 1.62" O.D. MTD-948-0318

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95
Shld. Bolt .342" Dia. x .268" No Longer Available MTD-738-0137

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96
Wheel Ass'y. Comp.- Rear MTD-NA

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96
8" x 1.75" Bar Tread Not Required MTD-634-0020

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96
8" x 1.75" "T" Tread No Longer Available MTD-734-1412

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96
8" x 2" "S" Wave (Silver) No Longer Available MTD-734-1412

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96
8" x 2" "S" Wave (Beige) MTD-734-1826

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96
8" x 2" "S" Wave (Silver) Not Required MTD-734-1826

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97
Bearing 1/2" I.D. MTD-NA

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97
1/2" I.D. Ball Brg. (2 Req'd.) MTD-941-0180

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97
1/2" I.D. Sleeve Brg. No Longer Available MTD-741-0486B

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97
1/2" I.D. Sleeve Brg. No Longer Available MTD-741-0486B

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98
Shld. Spacer .50" Dia. MTD-750-0624

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99
SCREW 1/4-20 x .620 GR5 MTD-710-0751

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100
SHOULDER PIN 3/8-24X1.43 MTD-711-0805

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101
Pawl Plate MTD-16855

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102
Chain Cover Ass'y. *CHOOSE COLOR WHEN ORDERING* MTD-17053A

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103
Hex Flange Brg..506" I.D. MTD-741-0324A

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104
Fl-Wash..531" I.D. x .93" MTD-936-0160

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105
Rear Axle Ass'y. MTD-938-0719A

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106
Hex Flange Bearing MTD-741-0522

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107
Chain Axle Ass'. No Longer Available MTD-17009

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108
Internal L-Wash. 1/4" I.D. MTD-736-0498

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109
Spacer 513" I.D. MTD-748-0190

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110
Extension Spring 3.8" Lg. MTD-932-0481

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111
Spacer.325" I.D. MTD-950-0589

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112

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113
Grass Catcher Locking Knob MTD-920-0224

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114
Hairpin Clip MTD-714-0104

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115
#48 Chain .50" Pitch x 30 Links MTD-913-0353

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116
Transmission Comp. MTD-917-0417B

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117
Hex L-Wash. H.D. AB-Tap Scr. 1/4 x .62" Lg. For models 470R thru 478R Only. MTD-910-0892

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118
Hex AB-Tap Scr. #12 x 1.25" Lg. For models 460R thru 468R Only. MTD-710-1025

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119
Grass Bag No Longer Available For models 460R thru 468R Only. MTD-764-0246

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120
Cable Clamp (B&S) New Part MTD-BS-690798

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121
Hex Self-Tap Scr. #10-32 x 62" Lg. (B&S) New Part MTD-710-1237

Idler Bracket Assembly

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1
Hex Bolt 1/4-20 x 1.25" Lg. w/Patch MTD-710-1062

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2
L-Wash. 1/4" I.D. For faster service obtain standard nuts, bolts and washers locally. If these items cannot be obtained locally, order by part number and size as shown on parts list. MTD-936-0329

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3
Upper Hsg. Half MTD-717-0418A

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4
#48 Sprocket Tooth x 1/2 Pitch MTD-713-0400

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5
FLAT WASHER MTD-936-0336

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6
Hex Flange Brg..631" I.D. MTD-741-0413

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7
Hex Bearing Cup MTD-16500A-0637

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8
Thrust Wash..382" I.D. x .70" O.D. MTD-736-0314

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9
Thrust Bearing .315" I.D. x .812" O.D, MTD-741-0479

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11
11 Tooth Helical Gear MTD-917-1216

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12
Flange Bearing MTD-748-0208A

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13
Oil Seal MTD-721-0212

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15
Fl-Pulley 5.06" O.D. Not Part of Transmission Complete MTD-756-0330A

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16
SPRING WASHER BELL Not Part of Transmission Complete MTD-736-0270

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17
Jam Nut, 1/4-28, LH Not Part of Transmission Complete MTD-712-04326

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18
Shld. Spacer .375" Dia. x .170" MTD-738-0440

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19
Fl-Wash..390" I.D. x 1.0" Not Part of Transmission Complete MTD-736-0344

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20
Shld. Bolt .375" Dia. x .40" Not Part of Transmission Complete MTD-738-0826

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21
Fl-ldler Plastic 1.50" Dia. Not Part of Transmission Complete MTD-956-0558

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22
Needle Brg..375" x .31 Not Part of Transmission Complete MTD-741-0556

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23
SPRING WASHER BELL Not Part of Transmission Complete MTD-736-0270

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24
Idler Brk't. Ass'y. Not Part of Transmission Complete MTD-17052A

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25
Hex Patch L-Nut 1/4-28 Thd. Not Part of Transmission Complete MTD-712-0138

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26
Extension Spring 1.12" Lg. Not Part of Transmission Complete MTD-732-0357A

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27
Lower Hsg. Half MTD-717-0419A

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28
Flange Bearing .566 ID MTD-941-0415

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29
33 Tooth Helical Gear MTD-717-0422

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30
Flange Bearing .629 Dia. MTD-741-0414

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31
Oil Seal .625 Dia. MTD-721-0213

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32
Gear Sprocket Shaft MTD-738-0607

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33
L-Wash. #10 I.D. MTD-736-0722

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34
Hex Wash. Hd. Self-Tap Scr. MTD-710-0651

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35
Hex Washer .26" x .88" Not Part of Transmission Complete MTD-736-0410

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Transmission Comp. MTD-714-0417B
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