1998 Mercury Sable Brake Service (ONLINE REPAIR MANUALS)

On Vehicles Equipped With Anti-Lock Brakes Refer To "Anti-Lock Brakes".

Complaints about power brake operation should be handled as if two separate systems exist. Inspect for faults in the hydraulic system first. If it is satisfactory, start inspecting the power brake circuit. For a quick inspection of proper power unit operation, press the brake pedal firmly and then start the engine. The pedal should fall away slightly and less pressure should be needed to maintain the pedal in any position.

Another inspection begins with installation of a suitable pressure gauge in the brake hydr...

Parking Brake Linings, Replace

Crown Victoria, Grand Marquis & Town Car

1997

The parking brake system is a drum type design mounted in the hubs of the rear brake rotors.

• Raise and support vehicle, then remove wheel and tire assembly.
• Remove caliper as previously outlined, then the rotor assembly.
• Drain differential fluid from axle by removing cover.
• Remove lock bolt from differential pinion shaft, then shaft from differential.
• Push axle shaft inward to access and remove axle shaft C-lock.
• Remove ABS speed sensor, then axle shaft from axle housing.
• Disconnect brake cable from lever, ...

Remove wheels and inspect brake disc, calipers and linings. Inspect and repack wheel bearings if necessary.

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

If caliper was removed 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. Inspect dust boots for punctures or tears. If punctures or tears are evident, install new boots during assembly.

Inspect piston bores in both housings for scoring or pitting. Bores showing light scratches or...

Master Cylinder Overhaul

Disassemble

• Clean outside of master cylinder thoroughly. Drain brake fluid from master cylinder.
• Remove stop bolt and pressure control valves, if equipped.
• Using a screwdriver, carefully pry up on reservoir and remove it from master cylinder body.
• Remove fluid control valve, if equipped.
• Depress primary piston and remove snap ring from retaining groove at open end of bore.
• Remove primary and secondary piston assemblies from master cylinder. If secondary piston does not come out, apply air pressure to secondary outlet port to remove.

Inspection

When disassembled...

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 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 to promote long lining life and equal lining wear of both the lefthand and righthand brakes.

Do not attempt to refinish the rubbing ...