1992 Ford Probe Brake Service (ONLINE REPAIR MANUALS)

On vehicles equipped with anti-lock brakes refer to appropriate "Anti-Lock Brakes".

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 unt...

CONTINENTAL, COUGAR, MARK VII, MARK VIII, MUSTANG & THUNDERBIRD

Sliding caliper rear disc brakes are used on Continental, Mark VII, Mark VIII, Mustang and Thunderbird, Figs. through . The caliper is basically the same as the larger front wheel caliper; however, a parking brake mechanism and a larger inner brake shoe anti-rattle spring have been added.

The parking brake lever, located at the rear of the caliper, is actuated by a cable system similar to rear drum brake applications. When the parking brake is applied, the cable rotates the lever and operating shaft, driving the caliper ...

Disc brake service is extremely 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 necessary to prevent brake roughness. In addition, the surface finish must be non-directional and maintained at a micro-inch finish. This is necessary to avoid pulls and erratic performance and promote long lining life and equal lining wear of both the left and right brakes.

Do not attempt to refinish the rubbing surfaces unless precision equipment...

On vehicles equipped with anti-lock brakes refer to appropriate "Anti-Lock Brakes".

POWER BOOSTER, REPLACE

CROWN VICTORIA, GRAND MARQUIS, TEMPO & TOPAZ

• Disconnect battery ground cable.
• Disconnect master cylinder from booster and position aside. It is not necessary to disconnect brake lines, but care should be taken to avoid twisting or kinking lines.
• Disconnect manifold vacuum hose from booster check valve.
• Working under instrument panel, disconnect stop lamp switch electrical connector under instrument panel.
• Remove stop lamp switch retaining pin. Slide switch off brake pedal p...

Remove wheels and inspect brake disc, caliper and linings. The wheel bearings should be inspected at this time and repacked if necessary. Do not get any grease on the linings.

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

Should it become necessary to remove the caliper when installing new parts, clean all parts in alcohol, then wipe dry using lint-free cloths. Using an air hose, blow out drilled passages and bores. Check dust boots for punctures or tears. If punctures or tears are evident, install new boots during assembly.

In...

• Inspect components for damage and unusual wear. Replace as necessary.
• Inspect wheel cylinders. Boots which are torn, cut, or heat damaged indicate need for wheel cylinder replacement. Fluid spilling from boot center hole, or wetness around wheel cylinder ends indicates cup leakage and need for wheel cylinder replacement. A small amount of fluid is always present and is considered normal, acting as lubricant for cylinder pistons.
• Inspect backing ...