42521900 Removing and Installing Rear Wheel Bearing Housing (Wheel Carrier)
WM 425219 Removing and installing rear wheel bearing housing (wheel carrier)
Tools
Preliminary work
CAUTION
Increased risk of accidents if the wheel carrier is raised improperly.
- Danger of injury and risk of damage to property.
-> 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.
1. Loosen axle nuts (wheel-side drive shaft fastening). (Do not remove them.) This prevents the drive shaft from slipping out when removing the wheel bearing housing. Actuate the brake while doing this.
2. Raise the vehicle=> Raising the vehicle and remove wheel -> 440519 Removing and installing wheel - section on "Removing" Removal and Replacement.
Removing rear wheel bearing housing (wheel carrier)
Wheel bearing housing with wheel hub and brake disc
Wheel bearing housing with wheel hub and brake disc
Information
- Before raising the vehicle, undo the drive shaft fastening at the wheel side. Operate the brake whilst doing so (2 workers required).
- In order to prevent damage to the drive shaft, suspension subframe or transmission flange, a protective tube (shop made) 00000 should be pulled over the drive shaft or the drive shaft should be secured.
- The brake discs do not need to be removed to disengage the brake cable -> 467919 Removing and installing (rear) brake cable for foot-operated parking brake 467919 Removing and installing brake cable for foot-operated parking brake (rear)
1. Using universal drive shaft/wheel hub puller as of model '86 NR.87-1 , push (press in) peg of drive shaft approx. 20 mm - 25 mm into the wheel hub. When doing this, observe drive shaft clearance on the halfshaft flange.
2. Loosen the drive shaft on the halfshaft flange.
3. Open the plug connections on the wheel bearing housing and pull off the connectors.
4. Remove the brake caliper from the wheel bearing housing and suspend it at a suitable position in the wheel arch (do not open brake hydraulics.).
5. Attach the foot-operated parking brake to the actuating mechanism using an auxiliary pin => see figure. To do this, press the adjustment device -arrow- and relieve with a max. 3.5 mm drill bit (or similar) -> 466019 Removing and installing actuator for foot-operated parking brake Service and Repair.
6. Unclip brake cable from the Quickfit in the wheel bearing housing -> 467919 Removing and installing (rear) brake cable for foot-operated parking brake 467919 Removing and installing brake cable for foot-operated parking brake (rear). Remove screw plug -arrow-. The screw plug obscures the view of the Quickfit. The Quickfit is positioned at approx. 3 o'clock to the right and approx. 9 o'clock to the left.
Information
- The spring strut screws are under tension. Carefully lever out the lower spring strut connection. Use a suitable lift with a rubber base.
7. Remove the spring strut at the wheel bearing housing.
8. Remove the two top control arms.
9. Remove the tie rod (toe control arm) at the wheel bearing housing.
10. Loosen the lower control arm -2- at the mount -1- and take out the wheel bearing housing with the drive shaft (a second worker is required for this).
11. Remove the axle nuts and take out the drive shaft.
Installing rear wheel bearing housing (wheel carrier)
Installation is in reverse order.
CAUTION
Increased risk of accidents if the wheel carrier is raised improperly.
- Danger of injury and risk of damage to property.
-> 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.
Information
- The entire threaded joints of the axle must be tightened in vehicle position. Vehicle position means: vehicle standing on the wheels, or the wheel suspension is raised with 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 are Dacromet-coated and must not be greased.
- Grease the toothing of the drive shaft slightly with aluminium paste Optimoly TA.
- Grease axle nut with a little Optimoly TA only at mounting-face ring.
- Drive shafts must not be left hanging from the joint stop. Support wheel carriers.
- Use new screws and lock nuts.
- Use a new circlip on the Quickfit.
- Make sure the bevel pinions from the ball joints are clean. Clean with a lint-free cloth if necessary. Do not use cleaning agent.
- Observe correct tightening torques.
1. Insert the drive shaft into the wheel hub. If the shaft cannot be pushed right in, use => see figure assembly fixture T10206 to pull the drive shaft in. Screw on the axle nuts in order to prevent the shaft from slipping out.
2. Insert the wheel bearing housing (second worker required).
3. Fit the control arms, the spring strut and the brake caliper.
4. Fit the drive shaft on the halfshaft flange.
5. Fit the Quickfit. Make sure that the circlip is sealed and seated well and that the end of the cable locks with an audible click.
6. Plug in the plug connections. Ensure correct routing.
Subsequent work
1. Fit the axle nuts and the wheel -> 440519 Removing and installing the wheel - section on "Installing" Removal and Replacement.
2. Remove the auxiliary pin from the pedal module of the foot-operated parking brake.
3. Perform suspension alignment => Suspension alignment, complete.