Ford Mustang (1999-2004) Service Manual: 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 the LH side of the bulkhead in the engine compartment, between the brake pedal (2455) and the brake master cylinder (2140).
- is divided into separate chambers by the diaphragms.
- will not operate if vacuum is restricted or if any of the vacuum related power brake components fail.
- is installed as an assembly.
If the power assist fails, the brake system will continue to operate with increased brake pedal effort.
Hose and Check Valve
The power brake booster check valve (2365):
- is located on the front of the power brake booster.
- is installed separately; (install a new grommet when installing a new check valve).
- is positioned between the power brake booster and the power brake booster hose.
- closes when the engine is turned off.
- in the closed position, traps engine vacuum in the power brake booster
- retains vacuum to provide several power assisted brake applications with the engine off.


Power Brake Actuation
Torque Specifications
...
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 brak ...
Other materials:
Valve Cover RH
Material
Item
Specification
Silicone Gasket and Sealant
F7AZ-19554-EA or equivalent
WSE-M4G323-A4
Removal and Installation
1. Remove the air cleaner outlet tube. For additional information, refer to
Section.
2. Disconnect the fuel line. F ...
Water Bypass Hose - 3.8L
Removal and Installation
1. Drain the engine coolant. For additional information, refer to Cooling
System Draining, Filling
and Bleeding in this section.
2. Remove the bypass hose.
3. To install, reverse the removal procedure.
4. Fill and bleed the co ...
Fuel Pump Module
Removal and Installation
1. Remove the fuel tank. For additional information, refer to Fuel Tank in
this section.
2. NOTE: For installation, tighten the bolts in the sequence shown.
Remove the module assembly flange bolts.
3. Clean the area around the fue ...
