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INSPECTION Inspect the cylinder bore. Light discoloration and dark stains in the bore are normal and will not The cylinder bore can be lightly polished but only with crocus cloth. Replace the cylinder if the bore is Inspect the cylinder pistons. The piston surfaces should be smooth and free of scratches, scoring and Discard the old piston cups and the spring and expander. These parts are not reusable. The original ASSEMBLY (1) Lubricate wheel cylinder bore, pistons, piston cups and spring and expander with clean brake fluid. (2) Install first piston in cylinder bore. Then install first cup in bore and against piston. Be sure (3) Install spring and expander followed by remaining piston cup and piston. (4) Install boots on each end of cylinder and insert push rods in boots. (5) Install cylinder bleed screw. INSTALLATION (1) Apply bead of silicone sealer around cylinder mounting surface of support plate. (2) Install cylinder mounting bolts and tighten to 20 N·m (15 ft. lbs.). (3) Connect brake line to cylinder. TIRES/WHEELS/WHEELS - STANDARD PROCE- (7) Bleed base brake system. (Refer to 5 - BRAKES - STANDARD PROCEDURE). SUPPORT PLATE REMOVAL (1) Remove wheel and tire assembly and brake drum. (2) Remove brake shoe assembly. (Refer to 5 - BRAKES/HYDRAULIC/MECHANICAL/DRUM - REMOVAL). (3) Remove parking brake cable from parking brake lever. (Refer to 5 - BRAKES/PARKING BRAKE/CABLES - REMOVAL). (4) Compress parking brake cable retainer tabs. Then push retainer and cable through and out of (5) Disconnect brake line at wheel cylinder. (Refer to 5 - BRAKES/HYDRAULIC/MECHANICAL/ (7) Remove axle shaft, (Refer to 3 - DIFFEREN- TIAL & DRIVELINE/REAR AXLE - 9 1/4/AXLE (8) Remove bolts attaching support plate to axle and remove support plate. INSTALLATION (1) Apply bead of silicone sealer around axle mounting surface of support plate. (2) Install support plate on axle flange. Tighten attaching bolts to 115 N·m (85 ft. lbs.). (3) Apply bead of silicone sealer around wheel cyl- inder mounting surface and install wheel cylinder. (4) Install brake line in wheel cylinder. TIAL & DRIVELINE/REAR AXLE - 9 1/4/AXLE (7) Connect parking brake cable to lever on sec- ondary shoe and install brake shoes on support plate. (8) Adjust brake shoes to drum with brake gauge. Fig. 48 Wheel Cylinder Components–Typical 1 - SPRING 5 - 28 BRAKES - BASE AN WHEEL CYLINDERS (Continued) |