Pinion Seals

Heavy Duty pinion seals are being exposed to increasingly difficult demands because of much higher shaft speeds and dramatically increased torque. Both of these conditions demand designs and materials that can withstand the higher temperature demands of heavy duty pinion seals. Amsted Seals now offers both one-piece seals that ride on the yoke and unitized seal and sleeve models where recommended. All meet or exceed the OE material recommendations.


  • Easy installation
  • Repair sleeves not required
  • Eliminated yoke wear
  • Eliminate leak paths
  • Reduce contamination failures
  • Long-life performance


  • The single piece, unitized design is installed in one step using the yoke bolt to install the press-fit OD
  • The unitized design incorporates a wear ring to provide an ideal running surface for the sealing lip, eliminating the need for repair sleeves that often change the seal lip angle during operation, resulting in reduced life
  • Sealing lips are contained in a manner that prevents yoke surface contact from the lip. New yokes will remain new at the sealing point
  • Bore sealant on the OD and the wide contact area on the ID eliminate leak paths to avoid premature failures
  • To promote long life, a labyrinth path with multiple dust lips prevents contamination ingress into the sealing lip and oil
  • Fluoroelastomer rubber on the main sealing lip withstands the high hear consistent with pinion seal applications