Parts for 840 — MTD
We found 172 parts confirmed to fit the MTD 840.
Compatibility table
| Part # | Part | Also fits | Reference price |
|---|---|---|---|
| 8402 | 15 MINUTE CHARGER (INCL. 107A, 107B, 107C) | This model only | — · Amazon |
| B5313 | Axle | This model only | $14.79 · Amazon |
| 1007363 | Burner Oil B | This model only | $2358.28 · Amazon |
| 1258509 | Chuck Screw | This model only | — · Amazon |
| 3201852 | Cir Bkr | This model only | $1576.42 · Amazon |
| 1258504 | Housing Set | This model only | — · Amazon |
| 1258511 | Housing Set | This model only | $60.60 · Amazon |
| 1258516 | MODULE W/HEATSINK | This model only | — · Amazon |
| 1258505 | Porter Cable Sel Switch | This model only | $4.56 · Amazon |
| 1258508 | Screw | This model only | $2.60 · Amazon |
| 1258512 | Transformer | This model only | — · Amazon |
| 1258502 | VS CONTROL W/HEATSINK | This model only | — · Amazon |
| 203991 | Home Electronics Resistor | 2 models | $9.99 · Amazon |
| 164049 | Home Electronics Transistor | 2 models | $19.49 · Amazon |
| 0035589 | SIDE REIL,INDIVUDUAL | 2 models | — · Amazon |
| 0039058 | Treadmill Drive Motor | 2 models | $309.70 · Amazon |
| 70550840637 | Shave Plate | 3 models | $102.49 · Amazon |
| 0032574 | Treadmill Walking Belt | 3 models | $52.76 · Amazon |
| 7830131 | Belt Guard | 4 models | $44.88 · Amazon |
| 8551 | Chuck | 4 models | — · Amazon |
| 0032414 | Console Assembly | 4 models | $188.54 · Amazon |
| 0032536 | Drive Belt | 4 models | — · Amazon |
| 0035604 | END CAP,DECK-RIGHT | 4 models | — · Amazon |
| 0032557 | END CAP,WHEEL | 4 models | — · Amazon |
| 0032522 | HARDWARE UPRIGHT | 4 models | — · Amazon |
| 9130193 | Hex Sprocket | 4 models | $91.38 · Amazon |
| 9130194 | Hex Sprocket | 4 models | $176.00 · Amazon |
| 0038655 | INCLINE BRACKET KIT | 4 models | — · Amazon |
| 7100698 | Lawn & Garden Equipment Bolt | 4 models | $8.51 · Amazon |
| 0032521 | Right Upright | 4 models | — · Amazon |
| 0032544 | SHOCK W/STORAGE LOCK | 4 models | — · Amazon |
| 0038650 | Safety Key | 4 models | — · Amazon |
| 7340275 | Tire Tube | 4 models | $117.93 · Amazon |
| 0032525 | Transport Wheel Assembly | 4 models | — · Amazon |
| 0035636 | WING RIGHT,CONSOLE | 4 models | — · Amazon |
| 9410301 | Ball Bearing | 5 models | $113.14 · Amazon |
| 7830351 | Fender | 5 models | $181.24 · Amazon |
| 7830066A | Lawn Mower Belt Cover | 5 models | $132.74 · Amazon |
| 7560989 | Lawn Tractor Engine Pulley | 5 models | $254.04 · Amazon |
| 00492200 | Nut | 5 models | $2.16 · Amazon |
| 7830337 | Pivot Bracket | 5 models | $45.37 · Amazon |
| 7380768 | Segment Shaft | 5 models | $36.67 · Amazon |
| 7210450 | Shift Boot | 5 models | $12.43 · Amazon |
| 05510A | Snowblower Auger Brake Assembly | 5 models | $87.60 · Amazon |
| 7610208 | Anti-Rotation Bracket | 6 models | $34.59 · Amazon |
| 7311683 | Battery Cover | 6 models | $15.20 · Amazon |
| 9410185 | Bearing | 6 models | $117.14 · Amazon |
| 7310757 | Conduit Conversion | 6 models | $2.57 · Amazon |
| 7111155 | Craftsman Ferrule-5/16 | 6 models | $41.16 · Amazon |
| 7310556 | Lawn Mower Hub Cap | 6 models | $3.71 · Amazon |
| 7500214 | Lawn Mower Spacer | 6 models | $4.73 · Amazon |
| 7380392 | Lawn Tractor Deck Connecting Rod | 6 models | $27.25 · Amazon |
| 8400 | Pad W/switch | 6 models | $240.45 · Amazon |
| 17485 | Retainer C | 6 models | $4.64 · Amazon |
| 73604605 | Washer | 6 models | $6.29 · Amazon |
| 7360452 | Bell Washer | 7 models | $31.12 · Amazon |
| 7103083 | Bolt-hex 5/1 | 7 models | $30.95 · Amazon |
| 126490637 | Chute Guard | 7 models | $267.36 · Amazon |
| 7560969 | Craftsman Lawn Tractor Mandrel Pulley | 7 models | $43.47 · Amazon |
| 7100589 | Craftsman Screw-hex Sl | 7 models | $34.32 · Amazon |
Prices shown are an informational reference range only, not an offer or an Amazon price — RepairKitHub does not sell parts directly. Each part links to an Amazon search so you can compare current listings yourself.
Common failure areas on this model
The confirmed parts above group into a handful of failure areas. Here is what each points to and how to check it before you order anything.
General hardware and mounting parts
Symptom: A small mechanical or mounting part has failed, cracked, or gone missing.
Check: Compare the physical shape and mounting points to the original piece, and confirm the exact part number against your model plate before ordering.
Parts in this group on 840: 8402 (15 MINUTE CHARGER (INCL. 107A, 107B, 107C)), 1007363 (Burner Oil B), 3201852 (Cir Bkr), 1258516 (MODULE W/HEATSINK), 1258505 (Porter Cable Sel Switch), 1258512 (Transformer), 1258502 (VS CONTROL W/HEATSINK), 203991 (Home Electronics Resistor), 164049 (Home Electronics Transistor), 0035589 (SIDE REIL,INDIVUDUAL), 70550840637 (Shave Plate), 8551 (Chuck), 0032414 (Console Assembly), 0032522 (HARDWARE UPRIGHT), 9130193 (Hex Sprocket), 9130194 (Hex Sprocket), 7100698 (Lawn & Garden Equipment Bolt), 0032521 (Right Upright), 0032544 (SHOCK W/STORAGE LOCK), 0038650 (Safety Key), 0032525 (Transport Wheel Assembly), 0035636 (WING RIGHT,CONSOLE), 9410301 (Ball Bearing), 7830351 (Fender), 00492200 (Nut), 7380768 (Segment Shaft), 7210450 (Shift Boot), 05510A (Snowblower Auger Brake Assembly), 9410185 (Bearing), 7310757 (Conduit Conversion), 7111155 (Craftsman Ferrule-5/16), 7380392 (Lawn Tractor Deck Connecting Rod), 8400 (Pad W/switch), 17485 (Retainer C), 73604605 (Washer), 7360452 (Bell Washer), 7103083 (Bolt-hex 5/1), 126490637 (Chute Guard).
Storage, trim and cosmetic hardware
Symptom: A cracked shelf, broken door bin, worn hinge, or missing trim piece -- cosmetic and storage wear rather than a functional breakdown.
Check: Match the physical dimensions and mounting tabs of the old part before ordering; these pieces are often model-specific even between visually similar models.
Parts in this group on 840: B5313 (Axle), 1258509 (Chuck Screw), 1258504 (Housing Set), 1258511 (Housing Set), 1258508 (Screw), 0035604 (END CAP,DECK-RIGHT), 0032557 (END CAP,WHEEL), 0038655 (INCLINE BRACKET KIT), 7340275 (Tire Tube), 7830337 (Pivot Bracket), 7610208 (Anti-Rotation Bracket), 7311683 (Battery Cover), 7310556 (Lawn Mower Hub Cap), 7500214 (Lawn Mower Spacer), 7100589 (Craftsman Screw-hex Sl).
Drive system (belts, pulleys, motors)
Symptom: A drum or tub that won't turn, a burning-rubber smell, or a loud thump or squeal during a cycle.
Check: With power off, turn the drum or tub by hand -- resistance or grinding points to the motor or a bearing, and a cracked, glazed, or snapped belt is visible once the cabinet is open.
Parts in this group on 840: 0039058 (Treadmill Drive Motor), 0032574 (Treadmill Walking Belt), 7830131 (Belt Guard), 0032536 (Drive Belt), 7830066A (Lawn Mower Belt Cover), 7560989 (Lawn Tractor Engine Pulley), 7560969 (Craftsman Lawn Tractor Mandrel Pulley).
Before you buy
Match 840 exactly against the model and serial plate on the appliance itself before ordering anything — a single mismatched character can point to a different production run with different parts. Then check the part number printed or stamped on the part you are replacing against the part numbers in the table above; the printed number is the most reliable way to confirm fitment when a model has gone through multiple production runs. RepairKitHub does not sell parts directly — every part link above routes to an Amazon search for that part number so you can compare current listings and sellers yourself.
How to confirm this is your model
Check inside a door opening, on a back or side panel, or behind a removable panel or drawer for a label printed with the model and serial number. Match every character exactly, including letters and dashes at the end — appliance model numbers often have similar prefixes but different suffixes for different production runs.
Still not sure?
Use the model lookup tool to search by model or part number, or start from the symptom your appliance is showing.