Disc Brake Caliper: Disassembly
With caliper assembly removed from vehicle, pad interior of caliper with shop cloths. Apply compressed air to fluid inlet port of caliper to remove piston. Remove dust boot from caliper. Using a plastic or wooden tool to prevent scratching caliper bore, remove piston seal from groove in caliper.
NOTE:
If piston is seized and cannot be forced from caliper, lightly tap around piston while applying air pressure. Be careful not to scratch piston bore when removing seal.