1991 Ford LTD Crown Victoria Brake Service (ONLINE REPAIR MANUALS)

Complaints about power brake operation should be handled as if two separate systems exist. Check for faults in the hydraulic system first. If it is satisfactory, start inspecting the power brake circuit. For a quick check 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 check begins with installation of a suitable pressure gauge in the brake hydraulic system. Take a reading with the engine off and the power unit not opera...

When working on or around brake assemblies, care must be taken to prevent breathing asbestos dust, as many manufacturers incorporate asbestos fibers in the production of brake linings. During routine service operations the amount of asbestos dust from brake lining wear is at a low level, due to a chemical break down during use and a few precautions will minimize exposure.Do not sand or grind brake linings unless suitable local exhaust ventilation equipment is used to prevent excessive asbestos exposure.

The brake shoe and lining assemblies should be replaced if the lining is ...

DISASSEMBLY

Except Capri, Festiva, Tracer, Scorpio, XR4Ti, Probe & 1991 Escort

• Remove caliper assembly from vehicle as described under "Caliper, Replace."
• Position fiber block and shop towels between caliper piston and caliper housing, then apply compressed air to caliper brake line fitting bore to force piston from caliper.
• Remove dust boot from caliper assembly,Figs. and .
• Remove piston seal from cylinder and discard.

Festiva

• Remove brake pads and caliper as outlined previously.
• Remove bleeder screw, drain remaining fluid from caliper, then reinstall screw.
• Remove dust boot retaining r...

BRAKE DRUMS

Any time the brake drums are removed for brake service, the braking surface diameter should be checked with a suitable brake drum micrometer at several points to determine if they are within the safe oversize limit stamped on the brake drum outer surface. If the braking surface diameter exceeds specifications, the drum must be replaced. If the braking surface diameter is within specifications, drums should be cleaned and inspected for cracks, scores, deep grooves, taper, out of round and heat spotting. If drums are cracked or heat spotted, they must be replaced. Mi...

CROWN VICTORIA, GRAND MARQUIS, TEMPO, TOPAZ & 1989-90 ESCORT

• 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 pin enough so outer plate of switch clears the pin, then remove switch from pin.
• Remove b...

BRAKE DRUMS

Any time the brake drums are removed for brake service, the braking surface diameter should be checked with a suitable brake drum micrometer at several points to determine if they are within the safe oversize limit stamped on the brake drum outer surface. If the braking surface diameter exceeds specifications, the drum must be replaced. If the braking surface diameter is within specifications, drums should be cleaned and inspected for cracks, scores, deep grooves, taper, out of round and heat spotting. If drums are cracked or heat spotted, they must be replaced. Mi...