REMOVAL & INSTALLATION
- Place a number of cloths or a container under the master cylinder to catch the brake fluid. Disconnect the brake tubes from the master cylinder, using a flare nut wrench only. Cap the open ends of the tubes.
Brake fluid dissolves paint. Wipe up any spilled fluid immediately, then flush the area with clear water.
- Remove the two nuts attaching the master cylinder to the booster or firewall, then remove the master cylinder.
- Position the master cylinder and install the retaining bolts. Torque to 22-30 ft. lbs. (29-41 Nm).
- Reconnect the fluid tubes using flare nut wrenches to 17 ft. lbs. (23 Nm).
- Bleed the brake system at the furthest wheel from the master cylinder first. Refer to the Brake System Bleeding procedure in this section.
- Remove the reservoir cover and diaphragm and discard any fluid in the reservoir.
- Depress the primary piston and remove the lock ring from the end of the housing.
- Direct compressed air into the outlet at the blind end of the bore, and plug the other outlet to remove the primary and secondary pistons.
- Remove the spring retainer and seals from the secondary piston.
- Clamp the master cylinder in a vise and use an appropriate prybar to remove the plastic reservoir.
Do not clamp on the master cylinder body. Do not attempt to remove the quick take-up valve from the body. The valve is not serviceable separately.
- Remove the reservoir grommets.
- Inspect the master cylinder bore for corrosion. If the bore is corroded, replace the master cylinder. Do not use any abrasives on the bore.
- Lubricate the new reservoir grommets with silicone brake lube and press them into the master cylinder body. Make sure the grommets are properly seated.
- Lay the reservoir upside down on a flat, hard surface. Press the master cylinder body onto the reservoir using a rocking motion.
- Lubricate new seals with clean brake fluid and install them on the secondary piston. Install the spring retainer.
- Install the spring and secondary piston assembly into the cylinder.
- Lubricate the primary piston seals with clean brake fluid. Install the primary piston, depress, and install the lock ring.
- Fit the diaphragm in the reservoir cover and install on the reservoir.