- Remove master cylinder and check valve from power unit. Place power unit in a vise with push rod up.
- Scribe alignment marks on front and rear shells to assure reassembly in original position. Remove clevis, lock nut, and dust boot from rear shell.
CAUTION:
Separate front and rear shells carefully. Spring tension may cause rear shell to release quickly.
- Attach suitable tool to rear shell mounting studs. Press down on tool while rotating it clockwise to unlock rear shell.
- Lift rear shell assembly from power unit, remove air silencer retainer, and separate diaphragm from power piston assembly. Remove valve rod with plunger assembly from rear shell.
- Remove lock plate and press the valve rod in to remove the valve retainer key. Remove valve rod and plunger assembly. Remove air silencer and filter.
NOTE:
Service the valve rod plungers as an assembly.
- Remove retainer, bearing, and rear seal.
NOTE:
Never remove the rear seal from the rear shell unless seal is defective and a new one is available.
- Remove the push rod, front seal, and the support plate.