This oil seal prevents lubricant leakage and contaminant ingress at the front planetary gear of the host tractor. It sits between the rotating shaft and the stationary housing, maintaining a sealed boundary that keeps the gearbox oil contained and the bearing surfaces clean. A worn seal allows oil to weep past the lip, which can lead to reduced lubricant level and eventual gear or bearing damage. The seal is manufactured by Corteco to match the original housing bore and shaft diameter, preserving the correct interference fit without requiring shimming or adapters. On installation, ensure the sealing lip faces the oil side and that the housing bore is free of burrs or debris.