WHEEL BEARINGS & SEALS The wheel hub revolves around the axle spindle on two roller bearings. The bearings are lubricated and the hub cavity is sealed against leakage by a seal which rides around an axle ring on the spindle shoulder. The graphic below illustrates the bearing and seal arrangement. Check oil level and for leaks around the oil seal at least once a week. If low, refill hub to oil level line on hub cap with a 75W90 syntheƟc gear oil. For best results and wheel end life, use only compaƟble lubricant prod- ucts.
Cross SecƟon View of Wheel Hub
Wheel Bearing Adjustment Bearing adjustment should be 0.001”-0.010” end play and a minimum of pre-load. Use the following procedure: 1. Tighten inner jam nut with a 12 inch wrench while turning wheel in both direcƟons unƟl there is a slight bind which indicates all bearing surfaces are in contact. 2. Back off inner jam nut 1/3 turn to allow the wheel to rotate freely. 3. Install washer and Ɵghten outer jam nut. 4. Final bearing adjustment should be with 0.001” to 0.010” end play. Tighten nuts at this posiƟon.
34
Made with FlippingBook Annual report maker