Front Wheel Bearings — Replacement (Opel Astra G)

1. Increased play when rocking the wheel in the vertical plane indicates bearing wear (first, you should make sure that there is no wear in the suspension arm connections).

2. Remove the wheel.

3. Remove the brake disc (Chapter 9). Disconnect the brake hose from the bracket on the suspension strut (see photo).



4. Unscrew the axle shaft nut, holding the hub with a lever by 2 temporarily screwed in bolts.

5. Loosen the tie rod end nut and press the end out of the steering knuckle arm. Disconnect the tie rod end.

6. Loosen the ball joint clamp tightening bolt.

7. Expand the ball joint clamp with a screwdriver or chisel.

8. Remove the ball joint from the hub bracket by pressing it with a pry bar. Move the hub bracket away and disconnect it from the lever (see photo).



9. On models with ABS, disconnect the wire from the wheel speed sensor (see photo).





10. Using a puller, remove the hub bracket with the brake shield.

11. Mark the position of the brake shield and hub bracket and disassemble the unit by unscrewing the 3 bolts from the back of the bracket (see photo).



12. The hub with the bearing is a non-separable unit and is changed as a whole.

13. Assembly is performed in the reverse order. Tighten the ball joint fasteners to the specified torque. Tighten the axle shaft nut in several stages (see Technical data) and lock it.