This seal fits the front axle hub of the host tractor, preventing lubricant leakage and keeping contaminants out of the bearing cavity. It sits between the rotating shaft and the stationary housing, maintaining a fluid-tight barrier under normal operating pressures. A worn or hardened seal allows oil to weep past the lip, which can lead to bearing starvation and eventual hub damage. The manufacturer machines the sealing lip to the same geometry as the original assembly, so it seats correctly in the housing bore without additional shimming. On installation, ensure the bore is clean and free of burrs, and lubricate the lip before pressing it in.