1992 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...

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

PUSHROD

Proper adjustment of the master cylinder pushrod is necessary to ensure proper operation of the power brake system. A pushrod that is too long will prevent the master cylinder piston from completely releasing hydraulic pressure, eventually, causing the brakes to drag. A pushrod that is too short will cause excessive brake pedal travel and cause groaning noises to come from the booster when the brakes are applied. A properly adjusted pushrod that remains assembled to the booster with which is was ...

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...

The hydraulic system must be depressurized before disconnecting any hydraulic lines or fittings. Depressurize the system by pumping the brake pedal a minimum of 25 times with the ignition switch in the OFF position.

After performing any service work, obtain a firm brake pedal before moving vehicle.

MARK VII

Replacement

To remove shoe and lining assemblies, remove caliper as described under "Caliper Service." It is not necessary to disconnect the brake hose. After removing the caliper, support it with a length of wire to avoid damaging the brake hose. To replace the shoe and lining a...

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 edge of disc. If thickness measurements vary by more than ...

SERVICE BRAKES

Although the brakes are self-adjusting, an initial adjustment will be required after a brake repair. The initial adjustment is performed as follows:

• Determine inside diameter of brake drum surface using brake shoe gauge tool No. D81L-1103-A, or equivalent. Adjust brake shoe diameter to fit gauge. Hold automatic adjusting lever out of engagement while rotating ...