Wheel Cylinder: Service and Repair

REMOVAL
1. Remove brake linings (1).
2. Remove brake pipe (4).
- Plug the opening in the line to prevent fluid loss and contamination.
3. Remove bolts (3) and wheel cylinder (2).

INSTALLATION
1. Install wheel cylinder (2) and tighten bolts (3) to the specified torque.
2. Install brake pipe (4) and tighten the nut to the specified torque.
3. Install brake linings (1).
- Bleed brake system.





DISASSEMBLY
1. Remove boot (1) and piston assembly (2).
2. Remove piston cup (3) from piston assembly (2).
3. Remove return spring (4) and bleeder (5) from wheel cylinder (6).

INSPECTION AND REPAIR
1. Make necessary parts replacement if wear, damage, corrosion or any other abnormal condition are fond through inspection.
Check the following parts:
- Wheel cylinder body
- Cylinder bore
- Piston
- Return spring
- Bleeder

NOTE: Replace the piston cups and boots each time the wheel cylinder is overhauled. Discard these used rubber parts and replace with new ones.


REASSEMBLY





1. Lubricate the cylinder bore with clean rubber grease.





2. Install bleeder (5) to wheel cylinder (6).





3. Install new piston cups (3) on each piston so that the flared end of the cups are turned to the inboard side of the pistons.
Attach the return spring (4) and the boot (1) to the piston.
4. Apply DELCO silicone lube No. 5459912 (or equivalent) to the piston and the inner face of the boots.
5. Install piston assembly (2) to wheel cylinder (6).