1458-43764
Oil Seal
Mack

An oil seal is a precision seal that sits between a rotating shaft and a stationary housing to retain lubricant and exclude contaminants. This unit is a high-quality oil seal intended for Mack heavy‑duty powertrains, where reliability is non‑negotiable. It features a robust metal outer shell that keeps the lip aligned under vibration, a high‑grade elastomer lip that maintains a tight seal against the shaft, and an auxiliary dust lip to keep grit away from the sealing surface. The compound resists high engine temperatures, exposure to crankcase oil, and fluids that may contact the seal during operation. Proper installation is essential: select the correct inner diameter, ensure the housing bore is clean, and seat the seal evenly so the metal edge seats flush. A worn or mis-seated seal can leak oil, permit dirt intrusion, and accelerate bearing wear, especially in hot long‑haul service. Regular inspection during service intervals helps catch leaks before they cascade into bigger failures. Replacing with OEM‑grade seals maintains oil pressure, reduces contamination risk, and extends component life. Source One Parts Center.