This oil seal prevents lubricant leakage and contaminant ingress at the shaft exit point of the drive system. It sits between the rotating shaft and the stationary housing, maintaining a sealed boundary that protects bearings and gears from debris and fluid loss. A worn seal allows oil to weep past the lip, which can lead to insufficient lubrication in the downstream assembly and eventual bearing failure. The seal is manufactured by Corteco to match the original housing bore and shaft surface finish, so the lip seats correctly without requiring additional shimming or adapters. On installation, inspect the shaft contact surface for scoring and lubricate the seal lip before pressing it into the bore.