This oil seal sits at the pivot joint of the steering knuckle, retaining lubricant and excluding contaminants from the bearing surfaces. It is a direct replacement for the original seal in the axle assembly, maintaining the correct interference fit in the housing bore. A worn or hardened seal allows grease loss and ingress of dirt, leading to accelerated wear in the steering pivot. Corteco manufactures the seal to the original geometry, matching the housing's seal groove depth and shaft contact width so no shimming or adapter rings are required. On installation, ensure the seal lip faces the lubricant side and the bore is free of burrs.