Wheel Cylinder: Service and Repair

REMOVING AND DISASSEMBLING REAR WHEEL CYLINDERS
1. Remove the rear brake shoes.
2. Disconnect the brake fluid pipe at the wheel cylinder using the spanner (49 0259 770A). Plug the end of the brake fluid pipe.
3. Remove the rear wheel cylinder.
4. Remove the following parts from the wheel cylinder.





1) Dust boots 5) Spring
2) Pistons 6) Bleeder cap and screw
3) Piston cups 7) Steel ball
4) Filling blocks

CHECKING REAR WHEEL CYLINDERS
1. Wash all parts in clean alcohol or brake fluid. Never use gasoline or kerosene.
2. Examine the cylinder bore and piston for wear, roughness or scoring.
3. Check the clearance between the cylinder and the piston.

Clearance limit: 0.15 mm (0.006 in)

If it exceeds the limit, replace the cylinder or piston.

4. Inspect the piston cups for wear, softening, swelling or any damage. If any of these conditions exists, replace the cups.

ASSEMBLING AND INSTALLING REAR WHEEL CYLINDERS
- Carry out the removing and disassembling operation in the reverse order.

Cautions
Apply multi-purpose grease on the following contacting surfaces.
a) Brake shoe and backing plate
b) Brake shoe and wheel cylinder piston
c) Brake shoe and anchor pin

- After installing, bleed the brake system and check for proper brake operation.