Vacuum Boost

Master Cylinder Replacement (Vacuum Boost)

Removal Procedure

Caution: Refer to Brake Fluid Irritant Caution in Cautions and Notices.

Note: Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.

1. Apply the park brake and block the wheels.
2. Disconnect the electrical connector from the brake fluid level sensor.






3. Disconnect the brake pipes from the master cylinder.

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

4. Plug the open brake pipe ends.






5. Remove the master cylinder mounting nuts.
6. Remove the master cylinder from the vehicle.
7. Remove the master cylinder reservoir. Refer to Master Cylinder Reservoir Replacement.

Installation Procedure

1. Install the master cylinder reservoir. Refer to Master Cylinder Reservoir Replacement.
2. Bench bleed the master cylinder. Refer to Master Cylinder Bench Bleeding.
3. Install the master cylinder to the vehicle.

Note: Refer to Fastener Notice in Cautions and Notices.

4. Install the master cylinder mounting nuts.
- Tighten the nuts to 36 N.m (27 lb ft).
5. Remove the rubber cap or plug from the exposed brake pipe fitting ends.






6. Connect the brake pipes.
- Tighten the fittings to 25 N.m (18 lb ft).
7. Connect the electrical connector to the brake fluid level sensor.
8. Bleed the hydraulic brake system. Refer to Hydraulic Brake System Bleeding (Manual) Hydraulic Brake System Bleeding (Pressure).
9. Release the park brake and unblock the wheels.