1998 Mercury Grand Marquis Brake Service (ONLINE REPAIR MANUALS)

Parking Brake

Cougar, Crown Victoria, Grand Marquis, Thunderbird, Town Car

• Apply parking brake control fully with 100 lbs. foot pedal effort, then release brake control.
• Place transmission in Neutral, then raise and support vehicle.
• With parking brake control in Off position, grasp tensioner around housing. Using an hook tool place end into rounded end of clip between clip and housing. Unlock clip by pulling downward with tool and support tensioner.
• The tensioner spring will take up cable slack and preload cables, while holding tensioner, lock clip by pushing up on bottom of clip. If cli...

Brake Roughness

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. 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 than .0005 inch, replace ...

On models with anti-lock brakes, the brake system power booster 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 in the Off position.

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

Cougar, Sable, Taurus, Thunderbird & 1997-98 Continental, Mark VIII & Mustang

Removal

On models with air suspension, turn service switch Off before beginning repairs.

• Raise and support rear of vehicle, then remove wheel and tire assembly.
• Remove bra...

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...

On models with anti-lock brakes, the brake 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 in the Off position.

Except Aspire, Contour, Escort, Mystique, Probe, Tracer, ZX2 & 1997-98 Mustang Cobra,

Removal

• Remove brake fluid until reservoir is half full.
• On Town Car and 1997-98 Continental, turn air suspension service switch (if equipped) to Off.
• On all models, raise and support front of vehicle, then remove wheel and tire assembly.
• Remove two calip...

Single Piston Calipers

The caliper assembly consists of a pin sliding caliper housing, inner and outer shoe and lining assemblies and a single piston, Figs. through . The caliper slides on two pins which also act as attaching bolts between caliper and the combination anchor plate and spindle. The outer brake shoe and lining assembly is longer than the inner brake shoe and lining assembly. Inner and outer shoe and lining assemblies are attached to the caliper by spring clips riveted to the shoe surfaces. The inner shoe is attached to the caliper by installing the spring clip to the i...