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Brake Caliper: Disassembly

  1. Remove caliper. Remove plug from inlet port (if used) and drain fluid from cylinders. Place a block of wood between caliper and cylinders. See Fig 1 . Apply low air pressure to brake hose inlet. Air pressure will force out piston.
    Fig 1: Using Compressed Air to Remove Caliper Piston
    G30595Courtesy of FORD MOTOR CO.
  2. If a piston is jammed or cocked and will not easily come out, tap end of piston sharply with a brass hammer to straighten. Do not pry piston from bore.
  3. Reapply low air pressure to remove cocked piston. Remove seal and boot from grooves. Discard seals and boots.