Disassembly (Power Piston)
- Remove diaphragm support ring from under secondary diaphragm. If not already disengaged, remove retainer plate from secondary piston, then remove piston rod retainer and rod. Place suitable power piston tool (J-23101) in vise. Position secondary power piston on tool, grip edge of support plate (not diaphragm) and rotate counterclockwise, to separate power pistons.NOTE: Primary support plate may unlock before primary power piston releases; however, continue turning until separation is complete.
- Remove housing divider from secondary power piston, and bearing from divider. With secondary power piston still on tool, grip support plate (not diaphragm) and rotate clockwise, to unlock secondary support plate from secondary power piston. Remove secondary diaphragm. Push reaction piston and disc out of secondary power piston. Remove the air valve spring, if necessary.
- Turn power piston tool over (small diameter end up). Remove primary power piston and diaphragm in same manner as secondary power piston. Remove air filter and silencer from power piston tube. Remove rubber reaction bumper and retaining ring from air valve. Using suitable rod (not exceeding 1/2" diameter), press air valve-push rod assembly from primary power piston. Remove "O" ring from air valve.