Four Wheel Drive Models

Fig. 1 Exploded view of disc brake assembly. 1980-81 CJ:

Fig. 2 Exploded view of disc brake assembly. 1980-83 Cherokee, Truck & Wagoneer; 1984-87 Grand Wagoneer & Truck:

Fig. 3 Exploded view of disc brake assembly. 1984-87 Cherokee & Wagoneer; 1986-87 Comanche; 1987 Wrangler:

Jeep, Type 1 Front Brakes, 4WD:

The disc brake is of the sliding caliper, single piston design. On 1980-81 CJ models, the caliper is positioned on abutment surfaces machined into the leading and trailing edges of the caliper anchor bracket. On 1980-83 Cherokee, Wagoneer and Truck and 1984-87 Grand Wagoneer and Truck models, the caliper is positioned on mounting bolts located in the caliper support bracket. On 1982-86 CJ and Scrambler, 1984-87 Cherokee and Wagoneer models, 1986-87 Commanche and 1987 Wrangler, the caliper is positioned over the rotor and slides on two mounting pins which maintain caliper position relative to rotor and caliper anchor plate.
All models are equipped with either an integral type hub and rotor or a two piece hub and rotor.
Although caliper designs differ in construction, operation and service procedures remain the same. The caliper is a one-piece casting containing a piston, piston bore, bleeder screw and inlet ports. A rubber dust boot with integral metal retainer is used on all models except 1980-81 CJ models, which use a solid rubber boot. The dust boot is positioned in a counterbore machined in the upper edge of the piston bore and in a groove machined in the exterior surface of the piston.

Lining wear is compensated for by the lateral sliding movement of the caliper and by increased piston extension.