This shaft seal prevents lubricant leakage from the front axle housing and keeps contaminants out of the bearing cavity. It sits at the axle end, where the rotating shaft passes through the stationary housing, and relies on a flexible lip pressed against the shaft surface to maintain the seal. A worn seal allows oil to weep past the lip, which can lead to bearing starvation and eventual axle damage. This original component is manufactured to the same lip geometry and material specification as the seal fitted during initial assembly, so it seats correctly in the housing bore without modification. On installation, ensure the sealing surface on the shaft is clean and free of grooves; lubricate the seal lip before fitting to prevent dry start-up damage.