Parts for Yard Machines 21AA413A352 / 2003: Gear Case Assembly Parts

Hex nut for lawn tractors, tillers, and riding mowers. Secures various components and assemblies. Replace if stripped, corroded, or missing.

Replace your tiller's 0.75-inch shaft seal to prevent oil leaks and maintain proper lubrication. Essential for reliable operation. Confirm fit with your model.

Snap ring fastener for lawn mowers and outdoor power equipment. Secures components on shafts and axles. Replace if worn, broken, or missing.

Replace your tiller's shifter assembly if damaged, cracked, or worn. This component enables gear shifting on rear-tine tillers. Installs on the frame.

This drive chain is a genuine MTD part, sold individually. A drive chain can be used as a replacement part in a snowblower or a tiller. This genuine OEM part is made out of durable, high quality metal material meant to stand up to exposure to the elements as well as general wear and tear over long-term usage.The drive chain in a snowblower or a tiller can be subject to damage that can render it beyond functionality. If this damage takes the form of puncturing, denting, cracking, warping, or eroding, the drive chain should be removed and replaced by this genuine OEM replacement part in order to guarantee safe continued use of the appliance.This component is a genuine OEM replacement part sourced directly from the manufacturer. It is sold individually. This drive chain is compatible with the following outdoor appliance brands: MTD, Craftsman, Cub Cadet, Troy-Bilt, Yard Machines, Huskee, and Yard Man.

Hex washer screw for lawn mowers, tractors, and snow blowers. Replaces stripped, missing, or damaged screws on deck panels and housing assemblies.

Seals the gear case to prevent oil leaks in your tiller. Replace when worn, cracked, or leaking. Verify fit with your model number before ordering.

If your tiller has grinding noises or won't engage properly, this 16-tooth spur gear restores smooth transmission operation. Common repair part.

Fix tiller tines that won't turn or engage with this drive shaft. Connects transmission to tilling mechanism. Moderate DIY repair in 1-2 hours.

This ball detent is a genuine MTD replacement part for appliances operated by small engines, including lawn tractors, lawn mowers, snowblowers, leaf blowers, chipper shredders, and tillers. The function of a ball detent is to temporarily keep two parts in place relative to one another, as one or both of the parts rotate.A ball detent might have to be replaced in the event that it suffers damage over time or is lost or misplaced. It is possible for ball detents to fall out of their spot, meaning that the parts that it ordinarily holds in place will not be able to rotate properly. Additionally, a ball detent might have to be replaced if there is material deterioration. If this occurs, a replacement ball detent part should be ordered and secured to the small engine appliance immediately. Remember to always wear gloves when handling, repairing, and operating outdoor equipment. This ball detent is compatible with the following brands: MTD, Yard Man, Yard Machines, and Troy-Bilt.

Tiller won't engage or gears grind? This clutch collar spaces beveled gears for smooth rotation and proper gear engagement. Common repair part.

Fix tiller transmission issues with this 17-tooth spur gear. Restores power transfer when gears slip or grind. Fits most rear-tine tiller models.

Wire retaining ring for lawn tractors and walk-behind mowers. Secures wiring harnesses in place. Replace if broken, missing, or no longer holding wires.