1999 Ford Mustang Brake Service (ONLINE REPAIR MANUALS)

Battery Ground Cable

Prior to service, disconnect battery ground cable and isolate as required.

System Depressurizing

On models equipped with anti-lock brakes, hyd...

Remove wheels and inspect brake disc, caliper and linings. Inspect wheel bearings and repack if required.

If the caliper is cracked or fluid leakage through the casting is evident, it must be replaced as a unit.

If caliper is removed when installing new components, clean all components in alcohol, then wipe dry using lint-free cloths. Blow out drilled passages and bores with compressed air. Inspect dust boots for punctures or tears, replace as required.

Inspect piston bores in both housings for scoring or pitting. Bores showing light scratches or corrosion can be cleaned with crocus clo...

Disc brake service is critical due to the close tolerances required in machining the brake disc to ensure proper brake operation.

Maintaining close control of the shape of the rubbing surfaces is required to prevent brake roughness. In addition, the surface finish must be non-directional and maintained at a micro-inch finish. This is required to avoid pulls and erratic performance, and to promote long lining life and equal lining wear of both the lefthand and righthand brakes.

Do not attempt to refinish the rubbing ...

Whenever new brake components are installed in the hydraulic system, it is recommended that the entire hydraulic system be thoroughly flushed with clean brake fluid.

It may sometime become required to flush out the system due to the presence of mineral oil, kerosene, gasoline, etc., which will cause swelling of rubber piston cups and valves and render them inoperative.

Flushing is performed at e...

This system operates on the same principles as conventional front and rear split systems using primary and secondary master cylinders moving simultaneously to exert hydraulic pressure on their respective systems, Fig. .

The hydraulic brake lines on this system, however, have been diagonally split front to rear (left front to right rear and right front to left rear) in place of separate lines to the front and rear wheels.

In the event of a system failure this would cause the remaining good system to do all the braking on one front wheel and the opposite rear wheel, thus maintaining 50%...

Vacuum Assist Diaphragm Type

The vacuum assist diaphragm assembly multiplies the force exerted on the master cylinder piston in order to increase the hydraulic pressure delivered to the wheel cylinders while decreasing the effort necessary to obtain acceptable stopping performance.

Vacuum assist units get their energy by opposing engine vacuum to atmospheric pressure. A piston, cylinder and flexible diaphragm utilize this energy to provide brake assistance. The diaphragm is balanced with engine vacuum until the brake pedal is depressed, allowing atmospheric pressure to unbalance the u...