Parts for Troy-Bilt 644A: Transmission Cover Parts

This lock washer is used frequently for a number of applications on power yard equipment. The size, 5/16, is the default for many small engine housing and manifold applications. Lock washers are used with machined bolts to fasten engine blocks to the housing of the equipment being used. The compressed washer is able to handle the constant vibration of the small gasoline engine without losing the seal between the screw or bolt and the housing. Typically these lock washers only need to be replaced when they are misplaced during repairs or when the screws that attach them have to be chiseled or cut away, meaning the washers are destroyed as well. These OEM certified replacement washers have been manufactured to the same specifications as the originals they are replacing. In addition to lawn mowers, lock washers of this type and size are frequently used on blowers, lawn tractors, cultivators, snowblowers, and trimmers. Brands compatible with this type of washer are Murray, Husky, Poulan, Bolens, Yard-Man, Cub Cadet, Troy-Bilt, Yard Machines, MTD, and Ryobi.

This is a wheel shaft oil seal that can be used on several tillers and lawnmowers. It is located in the same areas as the tire and wheel assembly and prevents the leaking of oil from this area of the equipment. The seal is made of durable plastic but wear and tear or regular use can wear it our or cause damage. If the seal is damaged, it will start to leak oil and the part will need to be replaced.An inspection of the wheel shaft oil seal will determine whether it is causing issues with the tool. First, the wheels need to be removed and the shafts cleaned. The wheel shaft oil seals can be accessed from here, so a user can determine if they need to be replaced. If they do, the old seals should be pulled out of the holes using a pry bar. Oil the new oil seals and replace them.This is an authentic OEM replacement part that is directly sourced from the manufacturer. It is sold as an individual oil seal. This component is designed to be used in lawn mowers and tillers that are manufactured by Troy-Bilt, Cub Cadet, and MTD.

This is a genuine OEM replacement tiller oil seal sourced from the manufacturer. It is designed for use with the tine shaft on various tillers. It prevents outside contaminants like water and debris from reaching the oil. The seal also prevents oil leaks, which would cause the bearing and gears not to receive adequate lubrication. Normal wear and tear will take a toll on the oil seal. Changing this seal should be done regularly, and anytime the tiller shows signs of decreased performance. Before starting, make sure the tiller is cool. Park it on a flat surface and remove the spark plug. Drain the fuel from the engine. Remove the gear housing cover on the tine shaft. Slide the gear assembly of the shaft and locate the oil seal. Remove the old oil seal. Clear the area any dirt and old oil with a clean cloth before installing the new oil seal. Apply lubricant to the oil seal to help with installation and sealing. Reinstall all parts. This oil seal is made of heavy-duty rubber and sold as an individual unit. It is designed for tillers manufactured by Troy-Bilt, MTD, Bolens, Craftsman, and Yard Machines.

This is a hex screw used on a variety of types of lawn and garden equipment. On large machinery, it is often used to mount the gas tank. On smaller items, it tends to be used to clamp the housing together. It can secure items like plastic, metal, brick, and wood together. It measures 5/16-18 x .75 inches and is made of durable metal. In some cases, the screw can become damaged, broken, or stripped, which means it needs to be replaced.A visual inspection will indicate whether the screw is damaged. If it needs to be replaced, a hex wrench can be used to remove it from the equipment. Afterward, the replacement hex screw can be installed with the wrench before being tightened to ensure materials hold together well.This hex screw is a genuine OEM part that is sold individually. It is sourced directly from the manufacturer. The hex screw is compatible with lawnmowers, wood chippers, log splitters, snowblowers, chainsaws, edgers, tillers, leaf blowers, and string trimmers by Craftsman, Cub Cadet, Ryobi, Troy-Bilt, Husky, Broan, Yard Machines, MTD, Huskee, Montgomery Wards, Bolens, Turf King, Yard-Man, and MasterCut.