Component Serviceability and Adjustments
Component ServiceabilityThe front disc brake calipers are serviceable components. Refer to the 1989 Premier Service Manual for removal, installation and overhaul procedures.
The only serviceable components on the rear disc brake assembly are the brake pads, operating lever, lever return spring and the slider pins, bushings and boots. The rear calipers are not serviceable with component parts and must be replaced as an assembly if diagnosis reveals a problem.
The master cylinder, power brake booster and proportioning valve are also not serviceable. These components must be replaced if diagnosis indicates a malfunction.
The front disc brake caliper bores must not be honed. The calipers must be replaced if the bores are worn oversized, scored, or severely corroded or pitted.
The front and rear disc brake rotors can be machined on a lathe to restore surface finish. However, if a rotor is, distorted, damaged or worn beyond allowable limits (refer to rotor service section for specifications), the rotor must be replaced.
Brake Adjustments
The parking brake front cable is the only adjustable component in the Premier four-wheel disc brake system. Refer to the cable adjustment procedure in this supplement.
Brake Cleaning Solvent
Use clean brake fluid or Mopar brake cleaner to clean or flush brake system components. These are the only cleaning materials recommended.
CAUTION: NEVER USE GASOLINE, KEROSENE, ALCOHOL, MOTOR OIL, TRANSMISSION FLUID, OR ANY FLUID CONTAINING MINERAL OIL TO CLEAN BRAKE SYSTEM COMPONENTS. THESE FLUIDS DAMAGE RUBBER CUPS AND SEALS. IF SYSTEM CONTAMINATION IS SUSPECTED, CHECK THE FLUID FOR DIRT, DISCOLORATION, OR SEPARATION INTO DISTINCT LAYERS. DRAIN AND FLUSH THE SYSTEM WITH NEW BRAKE FLUID IF CONTAMINATION IS SUSPECTED.