Brake Master Cylinder: Service and Repair

Master Cylinder / Booster Removal:

CAUTION:

^ Be careful not to bend or damage the brake pipes when removing the master cylinder and booster.

^ Do not spill brake fluid on the car; it may damage the paint; if brake fluid does contact the paint, wash it off immediately with water.

^ To prevent spills, cover the hose joints with rags or shop towels.

^ Before reassembling, check that all parts are free of dust and other foreign particles.

^ Make sure no dirt or other foreign matter is allowed to contaminate the brake fluid.

^ Do not mix different brands of brake fluid as they may not be compatible.

^ Do not reuse the drained fluid. Use only clean DOT 3 or 4 brake fluid.

^ When connecting the brake pipes, make sure that there is no interference between the brake pipes and other parts.

^ Do not disassemble the master cylinder or booster. Replace them as complete assemblies.


1. Drain the brake fluid from the master cylinder.

2. Disconnect the brake fluid level switch connectors.

3. Disconnect the brake pipes from the master cylinder.

4. Remove the master cylinder mounting nuts and the master cylinder.

5. Disconnect the vacuum hose from the booster and remove the check valve bracket.

6. Loosen the pushrod locknut.

7. Remove the cotter pin and joint pin.

8. Remove the booster mounting nuts.

9. Remove the clevis from the pushrod, then remove the booster from the body.

10. Install the booster on the body and install the clevis onto the pushrod.

Pushrod Adjustment:

11. Adjust the pushrod length as shown.

12. Install the removed parts in the reverse order of removal.

NOTE: Before installing the master cylinder, check and adjust the pushrod clearance.

13. After installation, check and adjust the brake pedal height.
14. Fill and bleed the brake system.