Master Cylinder, Brake: Removal
Vacuum in power brake booster must be pumped down (removed) before removing master cylinder from power brake booster. This is necessary to prevent power brake booster from sucking in any contamination as master cylinder is removed. This can be done simply by pumping brake pedal, with vehicle's engine not running, until a firm feeling brake pedal is achieved.
- With the engine not running, pump the brake pedal until a firm pedal is achieved (4-5 strokes).
- Disconnect and isolate the negative battery cable. If equipped with an Intelligent Battery Sensor (IBS), disconnect the IBS connector first before disconnecting the negative battery cable.
- Remove the windshield wiper cowl. Refer to COVER, COWL PANEL, REMOVAL .
- Thoroughly clean all surfaces of the brake fluid reservoir and master cylinder. Use only Mopar® Brake Parts Cleaner or equivalent.
- Disconnect the brake fluid level sensor wiring harness connector (3).
- Disconnect the primary (2) and secondary (4) brake tubes from the master cylinder. Install sealing plugs in the open brake tube outlet ports.CAUTION:
Before removing master cylinder from power brake vacuum booster, master cylinder and vacuum booster must be thoroughly cleaned. This must be done to prevent dirt particles from falling into power brake vacuum booster. Use only Mopar® Brake Parts Cleaner or equivalent.
- Remove the two nuts (1) attaching the master cylinder (3) to the power brake booster (1).
- Slide the master cylinder straight out of the power brake booster.CAUTION:
Vacuum seal (1) on rear of master cylinder (2) is used to allow vacuum ability in power brake vacuum booster. Vacuum seal MUST be replaced whenever master cylinder is removed from power brake vacuum booster.
- Remove the vacuum seal (1) located on the mounting flange of the master cylinder (2). The vacuum seal is removed by carefully pulling it off the rear of master cylinder. Do not attempt to pry the seal off the master cylinder by inserting a sharp tool between seal and the master cylinder casting. Damage can occur.
