Wheel Cylinder: Service and Repair

Wheel Cylinder Replacement

Removal Procedure





1. Raise and suitably support the vehicle. Refer to Vehicle Lifting.
2. Remove the tire and wheel assembly.
3. Remove the brake drum.
4. Remove the brake shoes.
5. Clean the dirt and foreign material around the wheel cylinder.
6. Remove the bleeder valve (1).

Important: Install a rubber cap or plug to the exposed brake pipe fitting ends in order to prevent brake fluid loss and contamination.

7. Disconnect the brake pipe fitting from the wheel cylinder. Plug the open brake pipe ends.
8. Remove the wheel cylinder mounting bolts (2).
9. Remove the wheel cylinder (3).

Installation Procedure





1. Apply THREADLOCKER, GM P/N 12345382, (Canadian P/N 10953489), or equivalent to the wheel cylinder shoulder face that contacts the backing plate.
2. Position the wheel cylinder (3) to the backing plate.

Notice: Refer to Fastener Notice in Service Precautions.

3. Install the wheel cylinder mounting bolts (2).
^ Tighten the wheel cylinder mounting bolts to 12 Nm (106 inch lbs.).
4. Remove the plugs from the brake pipe ends.
5. Connect the brake pipe fitting to the wheel cylinder.
^ Tighten the fitting to 15 Nm (11 ft. lbs.).
6. Install the bleeder valve (1).
^ Tighten the valve to 7 Nm (62 inch lbs.).
7. Install the brake shoes.
8. Adjust the drum brakes.
9. Install the brake drum.
10. Bleed the brake hydraulic system.
11. Adjust the parking brake.
12. Install the tire and wheel assembly.
13. Lower the vehicle.