Rear Suspension
Removing and installing rear-wheel bearingTools
Preliminary work
ATTENTION: Increased danger of accident when handling hydraulic presses.
^ Danger of crushing and material damage if the wheel carrier is raised improperly.
-> Watch out for parts falling when working with the hydraulic cylinder.
-> Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels).
-> When raising the suspension, use a suitable intermediate layer (hard rubber).
-> Do not damage the brake cover plate.
-> Vehicle may not be moved if drive shafts have not been fitted and tightened.
The wheel bearing is removed with the wheel bearing housing installed.
1. Remove the corresponding hub cap with puller hook 92291 and release the axle nut (lock nut) before lifting the vehicle. Operate the brake whilst doing so (second fitter required).
2. Raise the vehicle' and remove the relevant rear wheel.
3. Remove axle nut (lock nut) and the drive shaft.
Tools and materials
Tools overview for wheel bearing
Tools overview for wheel bearing
Removing rear wheel bearing
Component overview of wheel bearing
1. Release brake caliper and hang at a suitable place in the wheel housing.
2. Remove brake disc.
3. Disengage the cable of the foot-operated parking brake and remove the brake shoes.
4. Remove wheel speed sensor.
5. Remove wheel hub (tools).
6. Secure the grip pieces (two half shells) (from attachments T10205) with several wheel bolts behind the wheel hub.
7. Insert the T10205/2 bell (from attachments T10205) in the correct position in the groove provided.
8. Insert the tubular piston cylinder VAS 6178. Position the T10205/3 pressure piece (from attachments T10205) and the T10205/8-2 threaded nut (from attachments T10205). Press out the wheel hub.
Ensure that the separating device does not press on the seat of the bearing inner race on the wheel hub.
9. If the wheel hub is used again, remove the -> see figure inner race of the wheel bearing from the wheel hub. To do this, position the separating device 12 - 115 mm � NR.111 behind the inner race.
10. Press inner race off the wheel hub. To do this, position the T10205/2 bell (from attachments T10205) without the grip piece. Insert the tubular piston cylinder VAS 6178. Position the T10205/3 pressure piece (from attachments T10205) and the T10205/8-2 threaded nut (from attachments T10205).
11. Remove the circlip -arrow-.
12. Remove the wheel bearing (tools).
13. Press out the wheel bearing. To do this, position the T10205/4 mounting (from attachments T10205) and the T10205/5 pipe (from attachments T10205) in the correct position on wheel bearing housing. Insert the tubular piston cylinder VAS 6178. Position the T10205/6 pressure disc (from attachments T10205) and the T10205/8-2 threaded nut (from attachments T10205).
Installing rear wheel bearing
Note:
^ The wheel bearing must not come into contact with magnetic objects (e.g., magnetic screwdriver, magnet).
^ The entire threaded parts of the axle must be tightened in vehicle position. Vehicle position means: vehicle standing on the wheels, or the wheel suspension is raised using a universal vehicle lift. Dimension -X-, from lower edge of wing to middle of axle 506 mm ± 10 mm corresponds to vehicle position.
^ Use an intermediate layer (hard rubber) ! Do not damage the brake cover plate.
^ Screws and nuts are Dacromet-coated and must not be greased.
^ Grease axle nut with a little Optimoly TA aluminum paste only at mounting-face ring.
^ Grease the toothing of the drive shaft slightly with aluminum paste Optimoly TA.
^ Drive shafts must not be left hanging from the joint stop! Tie up.
^ Use new screws and locknuts.
^ The wheel bearing seat must be free of grease.
^ Observe correct tightening torques. ->42 Tightening torques for rear axle '
1. Fit the wheel bearing (tools).
Check that the bearing seat -arrow- is clean and the surface is in good order. There must be no scores, grooves or deformations.
Insert the wheel bearing with the magnetic multiple-pole ring to the drive shaft. Check the magnetic side (e.g., with a paper clip). Do not use magnets or screw drivers to check!
2. Position the -> see figure wheel bearing in the wheel bearing housing in the correct position. Position the T10205/7 pressure piece (from attachments T10205) in the correct position on the wheel bearing. Insert the tubular piston cylinder VAS 6178. Position the T10205/9 pressure piece (from attachments T10205) and the T10205/8-2 threaded nut (from attachments T10205) in the correct position. Mount the wheel bearing. Shortly before the stop, the applied force will be between 26 ft. lbs. and 44 ft. lbs. The maximum assembling force must not exceed 67 ft. lbs. at the stop.
3. Position the -> see figure circlip with the opening facing downward. When the Sager ring is fitted correctly, the dimension -X- is at least 15 mm. If this dimension is not reached, the Sager ring must be fitted again. If necessary, carefully press the wheel bearing again.
4. Fit the wheel hub (tools).
Carry out a close visual inspection of the seat of the wheel hub. There must not be scores, grooves or similar deformations on the hub.
5. Position the -> see figure wheel hub in the correct position. Position the T10205/10 pressure piece (from attachments T10205) in the correct position on the wheel hub. Insert the tubular piston cylinder VAS 6178. Position the T10205/6 pressure disc (from attachments T10205) and the T10205/8-2 threaded nut (from attachments T10205) in the correct position. Pull in the wheel hub. Shortly before the stop, the applied force will be between 6.5 ft. lbs. and 26 ft. lbs. The maximum assembling force must not exceed 30 ft. lbs. at the stop.
6. -> see figure Fit wheel speed sensor.
Subsequent work
1. Fit the drive shaft, brake shoes, brake disc, and brake caliper in reverse order. Engage the cable of the foot-operated parking brake and adjust the brake shoes.
2. Fit wheel.