Wheel Cylinder: Service and Repair

Disassembled View Of Wheel Cylinder (typical):

1. Raise and support vehicle.
2. Remove wheel, drum and brake shoes.
3. Disconnect hydraulic line at wheel cylinder.
4. Remove wheel cylinder attaching screws, then remove wheel cylinder.
5. Strip cylinder of boots, pistons, springs and seals, Fig. 9.
6. Inspect cylinder bore for scoring and corrosion. Discoloration is a sign that springs have been damaged by heat, replace them if necessary.
7. Clean cylinder bore with crocus cloth. If cleaning does not remove scoring, replace cylinder.
8. Lubricate cylinder bore and seals with brake fluid, then reassemble cylinder.
9. Reverse procedure to install. Bleed system. Refer to Brakes / Service and Repair / Brake System Bleed. Service and Repair