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:
Wheel Hub or Axle Flange Face Runout
NOTE: If the axle shaft assembly is removed, check runout of the shaft
itself. The forged (unmachined)
part of the shaft is allowed to have as much as 3.0 mm (0.120 inch) runout. This
alone will not cause a
vibration condition.
1. Position the special tool ...
Air filter check
WARNING: To reduce the risk of vehicle damage and or
personal burn injuries, do not start your engine with the air
cleaner removed and do not remove it while the engine is running.
Note: Failure to use the correct air filter element may result in
severe
engin ...
Shield
Removal
1. Remove the brake disc (1125). For additional information, refer to
Disc in this section.
2. Remove the brake disc shield (2K004).
1. Drill out three brake disc shield rivets.
2. Remove the brake disc shield.
Installation
1. I ...
