1991 Jeep Comanche Brake Service (ONLINE REPAIR MANUALS)

CHRYSLER

Except Front Wheel Drive Models

• On models equipped with Rear Wheel Anti-Lock brakes (RWAL), connect one end of a suitable hose to bleeder valve on RWAL hydraulic valve and submerge other end in a glass container partially filled with clean brake fluid.
• Pump brake pedal several times, then hold pedal down firmly.
• With pedal firmly depressed, open bleeder valve until pedal fades to floor, then close bleeder valve.
• Repeat procedure until a continuous flow of brake fluid is released from bleeder valve. Ensure a fluid level is maintained in master cylinder at all times.
• On all mod...

These units are self contained vacuum hydraulic power braking units. They are the vacuum suspended type which use engine intake manifold vacuum and atmospheric pressure for their power, eliminating the need for a vacuum reservoir. A mechanically operated control valve, integral with the vacuum power diaphragms, controls degree of brake application or release depending on amount of foot pressure applied to valve o...

FRONT WHEEL SENSOR, REPLACE

• Raise and support vehicle, then turn wheel outward to gain access to sensor.
• Remove tie straps from sensor wiring from steering knuckle and brake hose.
• Clean dirt and road splash from sensor and surrounding area. This is necessary to avoid sensor damage when removing.
• Remove bolt attaching sensor to steering knuckle, then the sensor, Fig. .
• Unseat grommet retaining sensor wire in wheelwell.
• From inside the engine compartment, disconnect sensor wire connector from anti-lock harness plug. Remove sensor and wire.
• Reverse procedure to install, noting the followin...

CHEROKEE, COMANCHE & WAGONEER

• Raise and support vehicle.
• Remove access slot cover at rear of brake support plate.
• Rotate adjuster screw until wheel locks, then back off screw approximately one turn.
• Install access slot cover, then lower vehicle and check for proper brake operation.
• Drive vehicle in Reverse, making 10 to 15 firm brake applications with one forward stop between each reverse application to equalize adjustment.

EXCEPT CHEROKEE, COMANCHE & WAGONEER

Two different rear drum brake designs are used. They are similar in construction and operation but differ in method of a...

REMOVAL

CJ-7, Cherokee, Comanche, Scrambler, Wagoneer & Wrangler

• Raise and support vehicle.
• Remove wheel and tire assemblies, then the brake drums.
• Remove U-clip and washer (1) from parking brake lever pivot pin, Fig. , and discard clip.
• Using suitable tool, remove primary and secondary return springs (2).
• Remove spring retainers, hold-down springs, and retaining pins (8).
• Install suitable clamps over ends of wheel cylinders.
• Remove adjuster lever, adjuster screw, and spring (4) from brake shoes (5).
• Remove brake shoes.

1990-91 Grand Wagoneer

• Raise and support vehicle, then remove brak...

DODGE & PLYMOUTH FULL SIZE TRUCKS & VANS

EXCEPT HYDRO-BOOST

Transverse Mount

• Disconnect vacuum hose from power booster.
• Remove master cylinder to booster attaching nuts, then the master cylinder.
• Remove booster pushrod to pivot attaching bolts.
• Remove power booster attaching nuts, then the power booster assembly.
• Reverse procedure to install.

Inline Mount

• Disconnect vacuum hose from check valve.
• Remove master cylinder to booster attaching nuts.
• Working from under instrument panel, position a suitable screwdriver between center tang on retainer clip and pin in brake pedal. Rotate scr...