Ford Mustang (1999-2004) Service Manual: Brake Booster - Hydro-Boost (Description and Operation)

The Hydro-Boost brake booster is a hydraulically operated brake booster powered by the power steering pump (3A674). The power steering pump provides the fluid pressure to operate both the power brake booster and the power steering gear (3504).

A Hydro-Boost reserve system (accumulator) stores sufficient fluid under pressure to provide at least two power-assisted brake applications in the event the power steering pump fluid flow is interrupted.

For low assist concerns on vehicles equipped with the Hydro-Boost system, refer to Section to check the power steering pump pressure and flow.

Brake Booster - Hydro-Boost

The brakes can also be applied manually if the reserve system is depleted.

Any leakage goes directly back to the power steering pump reservoir (3E764).

Brake Booster - Vacuum (Description and Operation)

Power Brake Booster The vacuum type power brake booster (2005): is a dual diaphragm, vacuum assisted power brake booster reduces brake pedal force and travel distance. is located on ...

Hydro-Boost Bleeding

1. NOTE: The Hydro-Boost power brake booster (2B560) is generally self-bleeding, and the following procedure will normally bleed the air from the power brake booster. Normal operation of the vehicle ...

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