DESCRIPTION
Brakes are hydraulically operated, actuated by a tandem master cylinder. Front brakes are floating dual piston disc type, and rear brakes are leading-trailing shoe/drum type. Parking brake is cable actuated, operating sliding wheel cylinders of rear brake assemblies.
ADJUSTMENT
PEDAL HEIGHT & FREE PLAY
Adjust pedal height to specifications by moving stop lamp switch. Pedal height should be 6.14" (156 mm) on vehicles equipped with manual transmission and 6.22" (158 mm) on vehicles with automatic transmission. After pedal height is adjusted, loosen push rod lock nut and adjust free play to .039 - .197" (1-5 mm)
FRONT DISC BRAKE PADS
Front disc brakes are self-adjusting, therefore, no adjustment in service is required.
REAR BRAKE SHOES
Raise and support vehicle and remove wheel. Using a suitable brake adjusting tool, tighten adjuster wedge clockwise until brake shoe contacts drum. Return adjuster wedge until shoe is slightly separated from drum. Check operation by turning drum and applying brakes, if shoe interferes with drum rotation, readjust.
PARKING BRAKE
With rear brakes adjusted, adjust front cable turnbuckle until rear brakes are locked when parking brake lever is pulled to sixth-ratchet stop. Release parking brake lever and make sure wheels turn freely.
HYDRAULIC SYSTEM BLEEDING
Attach a bleed tube to bleeder screw and immerse opposite end of tube in a container partially filled with brake fluid. Pump brake pedal two or three times, keep pedal fully depressed, open bleeder screw and exhaust air, close bleeder screw, and return brake pedal. Repeat operation until air bubbles are no longer seen in discharged fluid. Repeat procedure on remaining brake lines. Bleeding sequence is left-rear, right-rear, left-front, right-front.
REMOVAL & INSTALLATION
FRONT DISC BRAKE PADS
Removal - Raise front of vehicle and support in place, then remove wheels. Remove clips from retaining pins and pull out pins, coil springs and pad springs. Remove pads from caliper assembly using a suitable pair of pliers.
Inspection - With friction pads removed, measure their thickness. Replace any pad that is worn to less than .063" (1.6 mm) in thickness (not including metal backing plate). It is recommended that friction pads be replaced as a set to prevent any possibility of uneven braking.
Installation - Clean and apply P.B.C. grease (or equivalent) on yoke guide groove of cylinder body, sliding contact portions of yoke and end surface of piston. Loosen bleeder screw and push outer piston in cylinder until end surface of piston coinsides with end surface of retaining ring on boot. Install inner brake pad. Push inner piston in cylinder by pulling on yoke, then install outer brake pad. After installing pads, depress brake pedal several times to seat pads.
FRONT DISC BRAKE CALIPER
Removal - Raise vehicle and suitable support on safety stands; remove tire and wheel. Remove brake friction pads as previously described. Disconnect brake line from wheel cylinder. To ease removal of caliper, remove strut assembly and knuckle arm mounting bolt. Withdraw caliper mounting bolts and separate it from strut assembly.
Installation - To install brake caliper assembly, reverse removal procedures, noting the following: Bleed hydraulic system.
FRONT DISC BRAKE CALIPER
Removal - With caliper removed, remove hub dust cap, cotter pin and nut. Remove hub and rotor assembly with wheel bearing and washer in place. Remove bolts attaching rotor to wheel hub, and separate rotor from hub.
Installation - Reverse removal procedure, tighten rotor-to-hub bolts securely and adjust whee bearings.
REAR BRAKE ASSEMBLY
 |
| REAR BRAKE ASSEMBLY |
Removal (Rear) - Raise vehicle and suitably support on safety stands; remove tire and wheel. Loosen parking brake linkage at clevis pin and place out of way. Remove brake drum. Remove shoe retainer and return spring, then lift off shoe assembly. Disconnect brake line from wheel cylinder. If necessary, wheel cylinder can now be removed by withdrawing dust cover, adjusting shims and plates.
Inspecting - Inspect all brake components for damage or excessive wear and replace those found defective. Replace brake lining if it is oil soaked or lining is less than .059" (1.5 mm) thick.
\Installation - To install rear brake lining, reverse removal procedures, noting the following: Readjust shoe-to-drum clearance and, if necessary, bleed hydraulic system.
MASTER CYLINDER
Removal - Disconnect front and rear brake lines from master cylinder. Remove master cylinder attaching nuts and remove master cylinder.
Installation - To install master cylinder, reverse removal procedure, noting the following: Bleed hydraulic system and check pedal height.
OVERHAUL
FRONT DISC BRAKE CALIPER
Disassembly - Loose bleed screw and depress pistons into cylinder. Secure yoke in a vise and tap head with a mallet. Cylinder body can then be removed from yoke. When separating cylinder body from yoke do not allow piston to protrude from cylinder. Remove ring from piston and extract retaining rings from both pistons. Dust boot can now be removed. Depress and remove piston from cylinder. Remove piston seal from cylinder bore. Yoke can be further disassembled.
 |
| FRONT DISC BRAKE ASSEMBLY |
Inspecting - Thoroughly clean all internal parts and check each component for excessive wear or damage. If caliper bore is damaged or excessively rusted, it must be replaced. If, however, slight imperfections are evident, honing will eliminate them. It is recommended to replace all seals when overhauling.
Reassembly - Before assembling components, lightly coat with suitable brake grease. Insert bias ring into piston so round portion of ring fits to bottom of piston. Insert piston into cylinder. Do not fully seat piston. Install dust boot and retaining ring. Install yoke bias ring so it coincides whit yoke groove of cylinder. Fit bias spring to yoke so bias spring faces bleeder side of cylinder. With yoke spring inserted in cylinder groove properly align position of bias spring so groove of spring aligns with yoke. Assemble body-to-yoke tapping lightly if necessary.
MASTER CYLINDER
Disassembly - Remove master cylinder caps and filters and drain brake fluid. Using screwdriver, pry NOTE - Do not remove reservoir tanks, if tanks are removed for any reason discard and install new ones.
Inspecting - Thoroughly clean all components in approve grade brake fluid. Inspect all components for excessive wear or damage and replace parts as necessary.
Reassembly - Reverse disassembly procedure and note the following. Coat all parts with brake fluid (rubber parts with brake grease) when assembling
