This oil seal fits in the drive system of the host tractor. It prevents lubricant from leaking past the rotating shaft and blocks contaminants from entering the bearing cavity. A worn seal allows oil seepage that can lead to bearing failure and driveline noise. The seal is an original component from the tractor manufacturer, so its lip profile and interference fit match the shaft and housing bore of the original assembly. On installation, inspect the shaft surface for grooves or pitting and lubricate the seal lip before pressing it into the housing.