1993 Mercury Sable Brake Service (ONLINE REPAIR MANUALS)

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...

Pressure bleeding is recommended for all hydraulic disc brake systems.

The disc brake hydraulic system can be bled manually or with pressure bleeding equipment. The brake pedal will require more pumping and frequent checking of fluid level in master cylinder during bleeding operation.

Do not use brake fluid drained from the hydraulic system when bleeding the brakes. Be sure the disc brake pistons are returned to their normal positions and the shoe and lining assemblies are properly seated. Before driving the vehicle, check brake operation to be sure a firm pedal has been obtain...

PRE-TEST CHECKS

• Verify parking brake is completely released. If parking brake is applied, "Brake" lamp will be illuminated.
• Check brake fluid. As fluid level drops, red "Brake" lamp will illuminate. If fluid level continues to fall, amber "Check Anti-Lock Brake" lamp will illuminate and anti-lock function will be inhibited.
• Verify all of the following connectors are properly connected and in good operating condition:
• 55 pin connector of the computer module.
• 19 pin c...

CAPRI

Removal

• Raise and support vehicle, then remove wheel and tire assembly.
• Using chisel, unstake and remove halfshaft nut and washer. Discard nut and washer.
• Remove brake pads and caliper from steering knuckle as described under "Brake Pad Service."
• Support caliper with wire strung from coil spring. Do not disconnect brake line from caliper.
• Using tie rod end separator tool No. T85M-3395-A, or equivalent, disconnect tie rod end from steering knuckle.
• Remove ball joint pinch bolt, then separate control arm from steering knuckle.
• Remove steering knuckle to strut assembly bolts.
• Using knuck...

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...

BRAKE ROUGHNESS

The most common cause of brake chatter on disc brakes is a variation in thickness of the disc. If roughness or vibration is encountered during highway operation or if pedal pumping is experienced at low speeds, the disc may have excessive thickness variation. To check for this condition, measure the disc at 12 points with a micrometer at a radius approximately one inch from the edge of the disc. If thickness measurements vary by more t...