Rear wheel hub assembly
1 - Lid; 2 - Bridge journal; 3 - Brake drum; 4 - Hub; 5 - Bearing; 6 - Seal; 7 - Bolt for fastening the trunnion to the lever; 8 - Bearing; 9 - Washer; 10 - Nut; 11 - Crown lock washer; 12 - Cotter pin
1. Remove the brake drum (see Chapter Brake system).
2. Using a flat-blade screwdriver, remove the seal from the brake drum assembly - try to remember how it was installed.
3. Remove the inner bearing from the drum.
4. Support the assembly and knock out the outer bearing race.
5. Turn the drum over and knock out the inner bearing race.
6. Thoroughly clean the seat in the drum, completely removing all traces of dirt and old grease. Remove burrs, burrs and roughness using fine-grained sandpaper. Carefully check the surface for cracks and other signs of wear. Replace the component if necessary. Bearings and seals must be replaced regardless of their condition, since the outer races are inevitably destroyed during dismantling. Prepare new bearings, seals and special universal grease.
7. Before installation, lightly lubricate the outer bearing races with clean engine oil to facilitate seating.
8. Having securely supported the drum, place the outer race of the outer bearing in its place. Knock the race firmly into the receiving socket, making sure that it is seated perpendicularly. Use a piece of pipe of a suitable diameter as a mandrel - the mandrel should rest exclusively on the outer edge of the race.
9. Turn the drum over and, following the same procedure, install the outer race of the inner bearing into it.
10. Make sure both outer races are seated correctly, then wipe the assembly thoroughly.
11. Pack grease into both tapered roller bearings and apply grease to their outer races.
12. Place the inner bearing into its outer race.
13. Insert the new seal, jaws inward, into the receiving socket at the rear of the drum.
14. Place the seal flush with the drum surface or until it stops at the rear of the drum. If necessary, the seal can be tapped into the seat using a mandrel made from a section of pipe of a suitable diameter. Remember that the mandrel should rest only on the hard outer edge of the seal.
15. Turn the drum over and place the outer tapered roller bearing into its outer race. Install the toothed washer.
16. Pack the hub bearings with grease and install the brake drum assembly in place (see Chapter Brake system).