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BRA K ING SYSTEM DISMANTLE AND OVERHAUL Do not separate the caliper halves. . . 5. Clean the outer surfaces of the caliper with methylated spirit. 6. Using special tool clamp the pistons in the mounting half of the caliper and gently, keeping fingers clear, and with CAUTION, apply air pressure to the fluid inlet port to expel the rim half of timber between the appropriate piston and caliper. 7. Finally, remove the pistons keeping them identified with their respective bores. 8. Remove the wiper seal retainer by inserting a blunt screw driver between the retainer and the seal and prise the retainer carefully from the mouth of the bore. 10. Clean the bores, pistons and particularly the seal grooves with clean brake fluid or methylated spirit or pistons are corroded or if condition is not perfect the parts must be renewed. /- Assemble rim-half pistons Coat a new fluid seal with Lockheed disc brake using only the fingers and ensure that it is properly in section so that when the seal is seated it feels proud to the touch at the edge furthest away . 12. Smear the appropriate piston with disc brake lubricant and insert it squarely into the bore by Do not tilt the piston during insertion and leave approximately 8 projecting from the bore. 13. Coat a new wiper seal with disc brake lubricant and fit it to a new seal retainer. Slide the assembly, seal first, over the protruding piston and into the bore from the mounting half and use t h e clamp to home seal retainer and piston. Mounting-half pistons 14. Clamp the rim-half pistons and carry out the same procedure as for removing and fitting the rim half 6 to 13. Fit calipers and pads to vehicle 15. Fit the caliper to the axle and secure with the two bolts tightening evenly to the torque, data. 16. Connect the brake flcxiblc hose to the and remove the hose clamp. 17. Lightly smear the back and edges of the pads with disc brake lubricant carefully avoiding the friction 18. Fit the friction pads and secure using pins and clips or split pins (latest type) and anti- rattle springs. Splay the of early retaining pins. on both calipers, depress the brake pedal firmly several times to locate the friction 20. Fit the road wheels, the axle stands and finally tighten the road wheel nuts, see data. 21. Road test the vehicle, remembering that if new friction pads have been fitted they are not ‘bedded- in’ and may take several hundred miles before the 5 |