This oil seal sits on the crankshaft of the tractor or vehicle, retaining lubricating oil inside the crankcase while excluding dirt and debris from the rotating shaft. It is a radial lip seal that rides on the shaft surface; a worn or hardened lip allows oil leakage past the seal, which can lead to low oil pressure and contamination of the clutch housing. The seal is manufactured by Corteco to match the original housing bore and shaft diameter, preserving the correct interference fit and lip pressure against the shaft. On installation, ensure the seal bore is clean and free of burrs, and lubricate the lip before sliding it over the shaft.