468320 Replacing brake shoes

WM 468320 Replacing brake shoes

Preliminary work

1. Remove brake disc.
-> 465319 Removing and installing rear PCCB brake disc 465319 Removing and installing rear brake disc

Removing brake shoes





Component overview for parking brake

1. Loosen the adjustment device -B- with a screwdriver. => Adjustment device





Adjustment device

WARNING

Preloaded or pressurised components

- Risk of injury (e.g. crushing or bruising) when removing and installing springs.

-> Do not reach into the danger area.
-> Relieve the tension on components before starting work.
-> Secure components to prevent them from loosening suddenly.
-> Wear protective gloves and goggles.
-> Be very careful when working on the brake system.

2. Remove compression springs -C-. => Compression springs





Compression springs

3. Disengage both tension springs -D and E-. => Tension springs





Tension springs

4. Remove brake shoes with adjustment device -A and B-.
5. Secure actuator for parking brake using tie-wrap -arrow-.





Securing servo motor

Installing brake shoes





Component overview for parking brake

Installation is carried out in reverse order.

Align the entire unit in the middle.

Observe correct tightening torques.
1. Remove tie-wrap at actuator for parking brake.
2. Insert brake shoes with adjustment device -A and B-.

WARNING

Preloaded or pressurised components

- Risk of injury (e.g. crushing or bruising) when removing and installing springs.

-> Do not reach into the danger area.
-> Relieve the tension on components before starting work.
-> Secure components to prevent them from loosening suddenly.
-> Wear protective gloves and goggles.
-> Be very careful when working on the brake system.

3. Engage both tension springs -D and E-.
4. Install compression springs -C-.
4.1. Unplug the speed sensor connector and check, with the help of a torch (visual inspection), to see whether the compression spring -arrow- is engaged.





Compression spring next to speed sensor connector

4.2. Insert the speed sensor connector again.
4.3. Illuminate the cut-out behind the brake disc with a torch and check (visual inspection) to see whether the compression spring -arrow- is engaged.





Compression spring behind brake caliper

Subsequent work

1. Install brake disc.
-> 468316 Adjusting parking-brake shoes Adjustments
2. Adjust parking-brake shoes.
-> 468316 Adjusting and calibrating parking-brake shoes Adjustments
3. Grind down parking-brake shoes.
-> 468350 Reworking (grinding) parking-brake shoes Procedures