Wheel Cylinder Replacement

Removal Procedure





1. Remove the shoes. Refer to Brake Shoe Replacement.
2. Clean dirt and foreign material from the wheel cylinder and pipe flare nut.
3. Remove the pipe flare nut from the wheel cylinder at the rear of the brake backing plate. In order to avoid fluid spillage, do not fully remove the pipe flare nut.
4. Remove two bolts, the pipe flare nut and the wheel cylinder from the backing plate.
5. Use the bleeder valve to plug the end of the pipe in order to prevent fluid loss.

Installation Procedure





1. Apply GM P/N 12346240, or the equivalent, to the joint seam of the backing plate and wheel cylinder.
2. Remove the bleeder valve from the pipe.
3. Install the pipe flare nut to the wheel cylinder. Finger tighten the nut.

Notice: Refer to Fastener Notice in Service Precautions.

4. Install the wheel cylinder to the backing plate. Secure the cylinder with two bolts.
- Tighten the wheel cylinder mounting bolts to 7 - 11 Nm (62 - 97 inch lbs.).
- Tighten the pipe fitting nut to 14 - 18 Nm (124 inch lbs. 13 ft. lbs.).
5. Install the bleeder valve.
- Tighten the bleeder valve to 10 Nm (89 inch lbs.).
6. Install the bleeder valve cap.
7. Install the shoes and the drums. Refer to Brake Shoe Replacement.
8. Bleed the brakes. Refer to Brake Bleeding.
9. Inspect for leaks.