Master Cylinder: Assembly
WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
- Clean the interior and exterior of the master cylinder, the secondary piston (1), and the return spring in denatured alcohol, or equivalent. See Fig 1 .
- Inspect the master cylinder bore, inlet and outlet ports, the secondary piston (1), and the return spring for cracks, scoring, pitting, and/or corrosion. Replace the master cylinder if any of these conditions exist. See Fig 1 .
- Dry the master cylinder and the individual components with non-lubricated, filtered air.
- Lubricate the master cylinder bore, the secondary piston (1), the return spring, and all of the individual overhaul components with Delco Supreme 11(R), GM P/N 12377967 (Canadian P/N 992667), or equivalent DOT-3 brake fluid from a clean, sealed brake fluid container. See Fig 1 .
- Assemble the lubricated, new primary seal (6) and retainer, and new secondary seal (5) onto the secondary piston. See Fig 1 .
- Install the lubricated return spring and secondary piston assembly (1) into the cylinder bore. See Fig 1 .
- Install the lubricated, new primary piston assembly (2) into the cylinder bore. See Fig 1 .
- Using a smooth, round-ended tool, depress the primary piston (2) and install the new piston retainer. See Fig 1 .
- Install the master cylinder reservoir to the master cylinder. See MASTER CYLINDER RESERVOIR under REMOVAL & INSTALLATION.
- Install the reservoir cap and diaphragm to the reservoir.
- Install the master cylinder to the vehicle. See MASTER CYLINDER under REMOVAL & INSTALLATION.