Disassembly (Single & Dual Piston)

Remove caliper as previously outlined. Remove plug from inlet port (if equipped) and drain fluid from cylinders.
Place a block of wood between caliper and cylinders. Apply low air pressure to brake hose inlet. Air pressure will force out piston(s).
WARNING: DO NOT attempt to catch or protect piston with fingers while applying compressed air. Injury may result.

Fig 1: Using Compressed Air to Remove Caliper Piston
Courtesy of FORD MOTOR CO.
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.
Reapply low air pressure to remove cocked piston. Remove seal and boot from grooves. Discard seals and boots.

Fig 2: Exploded View of Single Piston Caliper

Courtesy of FORD MOTOR CO.