Parts Diagram Overview
The diagram presents an exploded view of the MTD 20-inch self-propelled mulching rotary mower, detailing the arrangement of its components. At the top is the engine assembly. Below it is the main mower deck, which houses the blade (8) and blade adapter (23). The handle assembly, comprising upper (17) and lower (15) sections, is attached to the rear of the deck, with control cables (12, 13, 14) connecting to the engine and drive system. The mower is supported by four wheels: front wheels (10) and rear wheels (11), which are connected to the deck via wheel arms (20, 21, 38) and associated hardware. The drive system includes pulleys (e.g., 74, 79, 84), gears (76, 77), belts (80), and a transmission assembly (82). The height adjustment mechanism is visible, featuring front (3, 32) and rear (25) plates. Various brackets, fasteners (bolts, nuts, washers), and retaining clips secure the assembly. Noteworthy operational notes include applying graphite-based lubricant annually and using Loctite +242.
Parts List
| Index No. | Part No. | Description |
|---|---|---|
| 1 | 022186 | Deck 20" Mulcher |
| 2 | 001206 | Decal Warming Blade Rotation |
| 3 | 091850 | Plate - Height Adjuster - Front |
| 4 | 616342 | Nut-5/16-18 Center Lock |
| 5 | 088674 | Bracket Pulley Mounting |
| 6 | 088658 | Bracket - Trans Pulley |
| 7 | 022236 | Cover Drive Wheel |
| 8 | 030189 | Blade 20" Mulcher |
| 9 | 381442 | Clip-Tinnerman |
| 10 | 041418 | Wheel Front 8" |
| 11 | 041442 | Wheel Rear 8" w/Gear |
| 12 | 052209 | Cable Engine/Blade Control |
| 13 | 052217 | Cable Throttle Control |
| 14 | 052522 | Cable Drive Engagement |
| 15 | 071563 | Handle Lower |
| 16 | 104687 | Bail Engine/Blade Control |
| 17 | 073247 | Handle Upper |
| 18 | 089615 | Bail Ground Drive |
| 19 | 096305 | Bracket Cable Retainer |
| 20 | 088435 | Bracket- Handle LH |
| 21 | 088427 | Bracket Handle RH |
| 22 | 087080 | Baffle Rear |
| 23 | 089888 | Blade Adapter |
| 24 | 087288 | Baffle Front |
| 25 | 088815 | Plate Height Adjuster - Rear |
| 26 | 089987 | Wheel Arm Assembly L.H. Rear |
| 27 | 089979 | Wheel Arm Assembly R.H. Rear |
| 28 | 457044 | Bolt-1/4-20 x 1/2 |
| 29 | 715078 | Nut-1/4-20 Flange Lock |
| 30 | 114462 | Tip Plastic |
| 31 | 150623 | Screw Hex Slotted #10 x 5/8 |
| 32 | 091835 | Lever Height Adjuster - Front |
| 33 | 158956 | Washer 1/4 |
| 34 | 106005 | Washer - Blade |
| 35 | 106914 | Clip-Trailing Shield |
| 36 | 452318 | Nut #10-24 Hex Nylon Insert |
| 37 | 458687 | Bolt #10-24 x 1/2 |
| 38 | 091819 | Wheel Arm - Front |
| 39 | 110064 | Cap Plastic Bolt |
| 40 | 110379 | Cable Tie |
| 41 | 112045 | Cap-Hub |
| 42 | 114421 | Trailing Shield - Plastic |
| 43 | 113589 | Knob Handle |
| 44 | 112177 | Pulley Drive Cable |
| 45 | 114108 | Cover Transmission |
| 46 | 114132 | Spacer Engine |
| 47 | 135665 | Spring Extension |
| 48 | 143115 | Decal - Warning CPSC |
| 49 | 148411 | Decal Warning Oil Overfill |
| 50 | 150201 | Washer Curved 5/16 |
| 51 | 150276 | Woodruff Key #6 |
| 52 | 715441 | Nut 3/8-16 Twin Whiz |
| 53 | 151282 | Ring Transmission - Top |
| 54 | 163972 | Bolt Shoulder |
| 55 | 151936 | Bolt Curved Head 5/16-18 x 2 1/4 |
| 56 | 152074 | Rope Stop |
| 57 | 164020 | Washer Hardened |
| 58 | 152371 | Rope Guide |
| 59 | 152553 | Washer-Thrust 1/2 |
| 60 | 154328 | Bolt Wheel, Rear |
| 61 | 154369 | Bolt-3/8-16 x 1 1/4 Shaved Head |
| 62 | 156075 | Washer Flat 1/2 |
| 63 | 156406 | Nut Hex 3/8-16 Flange |
| 64 | 156463 | Bolt Hex 5/16-18 x 2-3/4 Gr. 5 |
| 65 | 156638 | Washer Flat 1/2 |
| 66 | 156653 | Bearing Flange Nylon |
| 67 | 616854 | Washer 3/8 |
| 68 | 153668 | Bolt Wheel, Front |
| 69 | 157552 | Clamp Cable |
| 70 | 157610 | Locknut Flange 5/16-18 |
| 71 | 158907 | Bolt Carriage 5/16-18 x 5/8 |
| 72 | 163964 | Bolt-5/16-18 x 4 Gr. 5 |
| 73 | 163840 | Stud Short |
| 74 | 170621 | Pulley Idler, Flat |
| 75 | 171041 | Dog - Drive |
| 76 | 171058 | Gear - Drive RH |
| 77 | 171066 | Gear Drive LH |
| 78 | 171496 | Arm Idler |
| 79 | 171819 | Pulley 2 Speed |
| 80 | 171652 | V-Belt |
| 81 | 171660 | Sheave Engine |
| 82 | 171751 | Transmission Assembly |
| 83 | 179176 | Support Wheel Hub |
| 84 | 305367 | Pulley - Idler V-Groove |
| 85 | 310045 | Nut-5/16-18 |
| 86 | 380550 | Bolt Curved Head 1/4-20 x 2 1/4 |
| 87 | 150029 | Bolt-Curved Head 1/4 x 1 1/2 |
| 88 | 381624 | Bolt-Blade 3/8-24 x 2 Gr. 8 |
| 89 | 381665 | Bolt Shoulder |
| 90 | 156620 | Washer 1/2 x 1 |
| 91 | 381780 | Spring Transmission Retum |
| 92 | 150326 | Screw #10-24 x 1/2 Hex Slot Head |
| 93 | 381889 | Clip "U" Tinnerman |
| 94 | 382150 | Spacer |
| 95 | 158683 | Bolt Shoulder 1/4-20 |
| 96 | 446450 | Key Woodruff |
| 97 | 159780 | Bolt-Hex 5/16-18 x 5/8 Flange |
| 98 | 457499 | Bolt 1/4-20 x 1/2 Thread Forming |
| 99 | 315093 | Screw Set 5/16-18 x 1/4 |
| 100 | 715011 | Hairpin Cotter |
| 101 | 715037 | Nut-1/4-20 Keps |
| 102 | 715334 | Nut #10-24 Keps |
| 103 | 715557 | Decal - Starting Instructions |
| 104 | 715607 | Washer - Belleville |
| 105 | 794412 | Decal Drive Control |
| 106 | 153940 | Ring Transmission - Axle |
| 107 | 794974 | Decal Heat Reflector |
| 108 | 158212 | Washer - 5/16 |
| 109 | 162289 | Spacer Notched |
Important Notes:
- When servicing this unit, use only genuine General Power OEM replacement parts that are specifically designed and engineered for this particular model.
- Do not operate the unit unless all parts are properly attached and in good working order.
- Parts are right or left hand as viewed from the operator's position.
- Specifications are subject to change without notice.
Serial Number (S/N): 231910/232223
Parts List (P/L): 188474
Operator's Manual (O/M): 188557
Engine Manual (E/M): 189142
