This oil seal fits on the front axle of the host tractor, where it retains lubricant inside the hub and prevents dirt and moisture from entering the bearing cavity. It sits between the rotating shaft and the stationary housing, forming a contact seal that maintains a clean lubricant film around the bearing surfaces. A worn or hardened seal allows grease to escape and contaminants to reach the bearing, leading to accelerated wear and eventual hub failure. Corteco manufactures this seal to match the original housing bore and shaft shoulder geometry, so the lip sits at the correct interference and angle against the shaft. On installation, inspect the shaft contact surface for scoring or pitting; any damage there will shorten seal life regardless of the seal condition.