Hydro-Boost (R) Bleeding

Hydro-Boost (R) Bleeding

1. NOTE: The Hydro-Boost(R) power brake booster is generally self-bleeding, and the following procedure will normally bleed the air from the power brake booster. Normal operation of the vehicle will further remove any additional trapped air.

Fill the power steering oil reservoir with multi-purpose transmission fluid.





2. Remove the Powertrain Control Module (PCM) fuse to prevent the engine from starting.
3. Crank the engine for several seconds.
4. Check the fluid level in the power steering oil reservoir and add if necessary. Install the PCM fuse.
5. Start the engine.
6. With the engine running, turn the steering wheel from stop-to-stop twice. Turn the engine off.
7. Press the brake pedal several times to discharge the accumulator.
8. Repeat Steps 5 and 6.
9. If foaming occurs, stop the engine and allow the foam to dissipate.
10. Repeat Steps 5 and 6 as required, until all the air is removed from the system (when the foaming stops).