Hydraulic Brake Booster: Service and Repair

Brake Booster-Hydro-Boost

Removal and Installation

WARNING: The power brake booster should not be carried by the accumulator, nor should it ever be dropped on the accumulator. Check the snap ring on the accumulator for correct seating before the power brake booster is used. The accumulator contains high-pressure nitrogen gas and can be dangerous if mishandled.

WARNING: If the accumulator is to be disposed of, it must not be exposed to excessive heat. Before discarding the accumulator, drill a 1.6 mm (1/16 inch) diameter hole in the end of the accumulator can to relieve the gas pressure. Always wear safety glasses when performing this operation.

1. With the engine off, depress the brake pedal several times to discharge the accumulator.
2. Disconnect the battery ground cable. On vehicles equipped with dual batteries.
3. Remove the left side battery.
4. Remove the air cleaner housing.





5. Remove the brake pressure switch electrical connector.





6. Disconnect the power steering hoses.





7. Remove the brake master cylinder nuts.





8. Remove the power steering hose mounting bracket and the brake master cylinder, and position aside.





9. Remove the instrument panel steering column opening cover.





10. Remove the self-locking pin.





11. Remove the Brake Pedal Position (BPP) switch and the brake booster push rod from the brake pedal pin.





12. Remove the power brake booster nuts, and remove the power brake booster.
13. To install, reverse the removal procedure.
- Install new O-ring seals on the power steering pressure fittings.
- Bleed Hydro-Boost.