5-6. REPAIR PUMPHEAD ASSEMBLY (Cont'd).
Hypochlorite solution may be on the pumphead and chemical side diaphragm and can cause
severe chemical burns. To avoid injury wear gloves while working on them.
Remove 8 screws (1) and plastic pumphead (2).
Turn stroke adjusting knob (12) until dial reads 9 or less.
Threaded stud may stay in either diaphragm and must not be discarded
Unscrew and remove chemical side diaphragm (3).
Unscrew stud (4) from chemical side diaphragm (3). If stud is in water side diaphragm (8), unscrew it from
water side diaphragm.
Place small end of cylinder (5) face down on work bench.
Remove all but two screws (6), which will be opposite each other.
The water side diaphragm is under spring pressure, uncontrolled release may cause injury.
Maintain pressure on the water side diaphragm when removing it during maintenance.
Push top (7) down to relieve spring pressure and remove remaining two screws (6).
Slowly lift top (7) off, releasing spring pressure.
Remove spring (9).
Remove water side diaphragm (8).
Remove pad retaining screw (10).
Remove pad (11).
Remove dosage control knob (12).
Remove and discard preformed packing (13).
Remove screw (14), dial cover (15), and dial gear (16).
Remove dial holder screw (17), dial holder (18), and star washer (19).