Before deciding to overhaul the Brake Master Cylinder, it is important to check the availability and cost of a new or factory rebuilt unit, as well as the availability of a rebuild kit. The removal process involves locating the Brake Master Cylinder in the engine compartment and mounting it to the power
Brake Booster. To remove the Brake Master Cylinder, start by removing as much fluid as possible from the reservoir using a syringe. Place rags under the fluid fittings and prepare caps or plastic bags to cover the ends of the lines once they are disconnected. Loosen the tube nuts at the ends of the
Brake Lines where they enter the Brake Master Cylinder using a flare nut wrench. Pull the brake lines slightly away from the Brake Master Cylinder and plug the ends to prevent contamination. Disconnect the electrical connector at the Brake Master Cylinder and remove the two nuts attaching the Brake Master Cylinder to the power booster. Carefully pull the Brake Master Cylinder off the studs and out of the engine compartment, being cautious not to spill any fluid. The installation process involves bench bleeding the Brake Master Cylinder before installing it. Mount the Brake Master Cylinder in a vise and attach a pair of Brake Master Cylinder bleeder tubes to the outlet ports. Fill the reservoir with the recommended brake fluid and use a large Phillips screwdriver to slowly push the pistons into the Brake Master Cylinder, expelling air from the pressure chamber into the reservoir. Repeat this procedure until no more air bubbles are present. Remove the bleed tubes and install plugs in the open ports to prevent fluid leakage and air from entering. Install the reservoir cap. Install the Brake Master Cylinder over the studs on the power brake booster and tighten the attaching nuts finger tight. Thread the brake line fittings into the Brake Master Cylinder, being careful not to strip the threads. Fully tighten the mounting nuts and brake line fittings. Fill the Brake Master Cylinder reservoir with fluid and bleed the brake system. Test the operation of the brake system carefully before placing the vehicle into normal service.