The front wheel bearings should be repacked every 24,000 miles on 1970-74 vehicles, 25,000 miles on 1975-77 vehicles, and 30,000 miles on 1978-82 vehicles, or every 24 months, whichever occurs first.
REMOVAL & INSTALLATION
- Remove the caliper and the disc/hub assembly, as previously detailed.
- If either the disc or the entire hub assembly is to be replaced, unbolt the hub from the disc.
If only the bearings are to be replaced, do not separate the disc and hub.
- Using a brass rod as a drift, tap the inner bearing cone out. Remove the oil seal and the inner bearing.
Throw the old oil seal away.
- Drift out the inner bearing cup.
- Drift out the outer bearing cup.
- Inspect the bearings and the hub for signs of wear or damage. Replace components, as necessary.
- Install the inner bearing cup and then the outer bearing cup, by drifting them into place.
- Pack the bearings, hub inner well and grease cap with multipurpose grease.
- Install the inner bearing into the hub.
- Carefully install a new oil seal with a soft drift.
- Install the hub on the spindle. Be sure to install all of the washers and nuts which were removed.
- Adjust the bearing preload, as detailed following.
- Install the caliper assembly, as previously detailed.
- With the front hub/disc assembly installed, tighten the castellated nut to the torque figure specified in the Preload Specifications chart.
- Rotate the disc back and forth, two or three times, to allow the bearing to seat properly.
- Loosen the castellated nut until it is only finger-tight.
- Tighten the nut firmly, using a box wrench.
- Measure the bearing preload with a spring scale attached to a wheel mounting stud. Check it against the specifications given in the Preload Specifications chart.
- Install the cotter pin.
If the hole does not align with the nut (or cap) holes, tighten the nut slightly until it does.
- Finish installing the brake components and the wheel.