The rear wheel bearing and hub unit are replaced as a unit. Begin by loosening the spindle nut with the vehicle on the ground, then raise and support the vehicle safely. Remove the rear wheels and the brake disc retaining screws. Unbolt the brake hose brackets from the knuckle, then remove the caliper bracket mounting bolts and hang the caliper out of the way with a piece of wire. Take off the brake disc, using two 8 x 1.25mm bolts if the disc is frozen on the hub to push it away. Remove the spindle nut and pull the hub unit off the spindle, cleaning the backing plate and mating surfaces of the brake disc and hub with brake cleaner, and the spindle, washer, and hub with solvent. Inspect the hub unit for damage or wear; if the bearings are worn, the entire unit must be replaced. Install the hub unit and spindle washer onto the spindle, then install the spindle nut without tightening it. Next, install the brake disc and tighten the retaining screws to 7 ft. lbs. (10 Nm), followed by the brake caliper, tightening the mounting bolts to 28 ft. lbs. (39 Nm) and the brake hose brackets to 16 ft. lbs. (22 Nm). Reinstall the rear wheels and lower the vehicle, then tighten the new spindle nut to 181 ft. lbs. (245 Nm) and stake it with a punch. Finally, tighten the wheel nuts to 80 ft. lbs. (108 Nm) and test the operation of the brakes. The wheel bearings are not adjustable or repairable and should be replaced if found defective.