This oil seal, a Simmer ring, retains lubricating oil within the front axle housing while excluding dirt and moisture from the wheel-end or differential area. It sits on the rotating shaft at the axle's output, with its sealing lip riding against the shaft surface to maintain a fluid barrier. A worn or hardened seal allows oil to weep past the lip, leading to a gradual loss of axle lubricant and potential contamination of the brake or final-drive components. As an original AGCO part, the seal's lip profile and rubber compound match the original axle shaft's surface finish and operating temperature range, ensuring the correct interference fit without requiring a wear sleeve or shimming. On installation, inspect the shaft contact surface for grooves or pitting; if present, the shaft must be polished or sleeved to prevent premature seal failure.