Master Cylinder: Disassembly
WARNING: This page is about a different car, the 2002 Pontiac Grand Prix and 2002 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the brake master cylinder from the vehicle. See MASTER CYLINDER under REMOVAL & INSTALLATION.
- Secure the mounting flange of the brake master cylinder in a bench vise so that the rear of the primary piston is accessible.
- Clean the outside of the master cylinder reservoir on and around the reservoir cap prior to removing the cap and diaphragm.
- Remove the reservoir cap and diaphragm from the reservoir.
- Inspect the reservoir cap and diaphragm for the following conditions: If any of these conditions are present, replace the affected components.
- Cuts or cracks.
- Nicks or deformation.
- Remove the master cylinder reservoir from the master cylinder. See MASTER CYLINDER RESERVOIR under REMOVAL & INSTALLATION.
- Using a smooth, round-ended tool, depress the primary piston and remove the piston retainer. See Fig 1 .
- Remove the primary piston assembly from the cylinder bore.
- Plug the cylinder inlet ports and the rear outlet port. Apply low pressure, non-lubricated, filtered air into the front outlet port, in order the remove the secondary piston with the primary and secondary seals, and the return spring.
- Discard the primary piston assembly, the piston retainer, and the seals and seal retainer from the secondary piston.