Parts for 31A3CAD729 — MTD
We found 64 parts confirmed to fit the MTD 31A3CAD729.
Same parts list as 3AA (MTD). 31A3CAD729 shares an identical confirmed parts list with 3AA (MTD). That page is the canonical version of this parts list — use it if you want the primary reference, or stay here since the list below is exactly the same for 31A3CAD729.
Compatibility table
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.
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 31A-3CAD729: 7840434C (BRACKET-AUGE), 68404166A0638 (Housing Assembly), 7840419C0709 (Housing Frame), 75304430 (Lawn & Garden Equipment Screw), 74904147B (MTD Snowblower Handle, Lower), 75004852 (MTD Snowblower Spacer), 9501355 (MTD Snowblower Spacer), 7840419C (MTD Snowblower Wheel Housing Frame), 75004913 (Snowblower Auger Cable Clamp Spacer), 71004606A (Snowblower Screw), 79000087A4019 (HOUSING:BEAR), 72004032 (Knob Assembly), 7100456 (Lawn & Garden Equipment Hex Drive Screw), 99000053 (Snowblower Handle Tab), 9380281 (Snowblower Shoulder Screw), 95004191 (Spacer), 1120663 (Toro Tap Screw), 73104388A (Snowblower Chute Handle), 7101245B (MTD Snowblower Hex Cap Screw), 7100605 (Lawn & Garden Equipment Machine Screw), 7320429A (Extension Spring), 7312635 (Snowblower Clean-Out Tool Retainer Clip), 73104870 (MTD Snowblower Auger Shaft Spacer), 9200284 (Snowblower Wing Knob), 7100654A (Ace Lawn Tractor Hex Screw), 72004072A (Yard Machines Lawn Mower Handle Knob).
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 31A-3CAD729: 93104162A (MTD Snowblower Auger Drive Belt Cover), 7840434C0637 (MTD Snowblower Auger Idler Pulley Bracket), OEM75404014 (Snowblower Auger Drive Belt, 3/8 X 26-3/8-in), 95604024 (Snowblower Auger Pulley), 7560569 (Sears Snowblower Engine Pulley), 75404013 (Snowblower Ground Drive Belt), 95404014 (MTD Snowblower Auger Drive Belt, 3/8 x 27-1/8 in), 75404014 (MTD Snowblower Auger Drive Belt), 95404013 (MTD Snowblower Ground Drive Belt, 3/8 x 43-3/16-in), 7560625 (MTD Lawn Mower Roller Wheel).
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 31A-3CAD729: 94604256 (MTD Snowblower Drive Cable), 94604236 (Snowblower Auger Drive Cable), 68404113A0637 (Snowblower Auger, Left), 91704073A (Snowblower Drive Sprocket), 9360160 (Snowblower Flat Washer), 99000064 (Snowblower Muffler Guard), 71504020 (Snowblower Roll Pin), 68404113A (Auger Asm-lh), 7471214 (Lawn Mower Drive Control Bar), 74104108 (MTD Lawn & Garden Equipment Hex Flange Bearing), 68404114A0637 (MTD Snowblower Auger Assembly, Right), 9312636A (MTD Snowblower Chute Adapter), 98404037 (Snowblower Chute and Deflector), 91804292C (MTD Snowblower Gearbox), 7100572 (MTD Yard-Man Lawn and Garden Equipment Carriage Bolt), 93104353 (MTD Snowblower Chute Ring), 78455800637 (MTD Snowblower Skid Shoe (Polo Green)), 9312643 (MTD Snowblower Clean-Out Tool), 7410493C (Snowblower Flange Bearing), 9410245 (MTD Snowblower Flange Bearing), 91804296B (MTD Snowblower Transmission), 73804124A (Craftsman Snowblower Shear Pin), 7410309 (Bearing), 7360451 (Washer).
Before you buy
Match 31A3CAD729 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.
Other models with this exact parts list
Each model below is confirmed to share the identical compatible-parts list with this one.
Still not sure?
Use the model lookup tool to search by model or part number, or start from the symptom your appliance is showing.