1. Remove the hub bearing unit (A) and O-ring (B).

1. Install the hub bearing unit in the reverse order of removal, and note these items:
   - Use a new O-ring on reassembly.
   - Tighten all mounting hardware to the specified torque values.
   - Before installing the brake disc, clean the matching surfaces of the hub bearing unit and brake disc.
   - Before installing the wheel, clean the mating surfaces of the brake disc and the inside of the wheel.
   - Check the wheel alignment, and adjust if necessary.