1994 Mercury Sable Brake Service (ONLINE REPAIR MANUALS)

The anti-lock system (ABS), Fig. , controls each brake separately. The brake pedal force required to engage the system may vary with road surface conditions. A dry surface will require a high force, while a slippery surface will require a much less force. During system operation, the driver will sense a slight brake pedal pulsation accompanied by a rise in brake pedal height and a clicking sound. The pedal effort and pedal feel during normal braking are similar to a conventional power brake system.

SYSTEM COMPONENTS

Vacuum Booster

The diaphragm type brake booster is self-contained and ...

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...

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 ...

• On models equipped with anti-lock brakes, prior to disconnecting any hydraulic lines or fittings, hydraulic system must be depressurized by pumping the brake pedal a minimum of 25 times with ignition switch in OFF position.
• On all models, grease or any other foreign material must be kept off caliper, disc surfaces and external hub surfaces during service procedures. Handling brake disc and caliper should be done in a way to avoid deforming disc and nicking or scratching brake linings.
• If inspection reveals rubber piston seals are worn or damaged, they should be replaced immediately.
• Du...

HYDRAULIC BRAKE FLUID COLOR

Hydraulic brake fluid must conform with the requirements of Federal Motor Vehicle Safety Standard 116. Under this standard, brake fluids are visually different from other automotive fluids such as transmission, power steering and engine.

Fluid color in a normal brake system may vary from its original color for many reasons. A brake master cylinder may show significantly different shades fluid color between the two brake master cylinder reservoirs. Color may also appear to vary between cast steel and die cast aluminum reservoirs. Some reasons for discolorati...