REMOVAL & ASSEMBLY OF WHEEL D. CYLINDER REMOVAL Remove bleed screw cap, bleed screw and 1. protective plug Pump out the brake fluid in a suitable container 2. by operating the brake pedal. Remove boot/ dust cover 3. Push out the piston with seal’s. 4. Remove the seals from the plunger using a 5. blunt edged connector. Discard all rubber parts. 6. Clean all parts in fresh brake fluid or alcohol 7. and place them on clean sheet of paper. ASSEMBLY When properly inspected, assemble as follows: Absolute cleanliness has to be maintained and clean brake fluid must be used. Never use brake fluid bled from the system as it may be certainly aerated. Lubricate the wheel cylinder bore liberally with 1. fresh brake fluid. Dip new seals and piston in fresh brake fluid. 2. Fit the gland seal onto the plunger groove in 3. one of the pistons and insert the piston with seal into the bore, such that the smaller stem of the piston is facing outside. Reverse the dust cover and fit the smaller dia 4. of the dust cover onto the neck of the piston and fit dust cover on the wheel cylinder Insert the spring assembly into the bore. Insert 5. the other plunger with seal. (assemble as said before) and fit the dust cover as per step no.3. Fit a rubber band around the piston to retain them within the bore. INSTALLATION OF WHEEL CYLINDER Install the wheel cylinder assembly on to the 1. backplate with the set screw and washers. Tighten the wheel cylinder mounting screws to 2. a torque specified. Fit the bleed screw and tighten to a torque specified. ASSEMBLING NEW AUTO ADJUSTER E. After the auto adjuster has been removed from the brake assembly, the old one has to be quarantined, To assemble the new adjuster the following to be done Apply enough grease to the female push rod. 1. Then apply enough grease to the female push 2. rod threads. Assemble the adjuster nut (ratchet) to the male 3. push rod. Then assemble the male push rod into the 4. female push rod. The adjuster assembly is ready for assembly. 5. Then assemble it to the shoe assembly. 6. ASSEMBLE ADJUSTER TO THE SHOE ASSEMBLY Assemble the adjuster to the shoe assembly. NOTE Never clean the wheel cylinder or internal parts with kerosene, petrol or diesel as it will lead to contamination and damaging the rubber part. BRAKES 55
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