Rear Disc Brake Caliper Operation

FIGURE 3:

The rear calipers have a two-stage (stepped) cylinder bore. The piston is located in the large diameter bore. The parking brake actuation mechanism is located in the smaller diameter bore (Fig. 3).

During normal braking, the calipers operate basically the same way as the front calipers. The brake shoes are applied through hydraulic pressure acting internally on the piston.

The parking brake is actuated mechanically by the parking brake lever. If a problem exists with the park brake mechanism then the COMPLETE caliper assembly must be replaced. The calipers internal components are not serviceable.

The caliper assembly internally self adjusts to compensate for brake pad lining wear. If the self-adjusting mechanism fails, then the entire caliper assembly should be replaced since the internal components of the caliper are not serviceable.
RECOMMENDED BRAKE FLUID

The only brake fluid recommended for use in the Premier four-wheel disc brake system is Mopar brake fluid, or an equivalent fluid meeting DOT and SAE standards J1703 and DOT 3.

Use only new brake fluid to top off the master cylinder or refill the system. Never use reclaimed fluid, fluid not meeting the SAE/DOT standard, or fluid from a container that has been left open for any length of time.