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SECTION III.  DIRECT SUPPORT MAINTENANCE PROCEDURES
REPAIR PUMPHEAD ASSEMBLY - cont

TM-10-4610-244-13 Hypochlorination Unit NSN 4610-01-364-4485 Model AHY001 Manual
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TM 10-4610-244-13 TM 09476B-13/1 5-6.  REPAIR PUMPHEAD ASSEMBLY (Cont'd). a.  DISASSEMBLY WARNING 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. (1) Remove 8 screws (1) and plastic pumphead (2). (2) Turn stroke adjusting knob (12) until dial reads 9 or less. NOTE Threaded stud may stay in either diaphragm and must not be discarded (3) Unscrew and remove chemical side diaphragm (3). (4) Unscrew stud (4) from chemical side diaphragm (3).  If stud is in water side diaphragm (8), unscrew it from water side diaphragm. (5) Place small end of cylinder (5) face down on work bench. (6) Remove all but two screws (6), which will be opposite each other. WARNING 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. (7) Push top (7) down to relieve spring pressure and remove remaining two screws (6). (8) Slowly lift top (7) off, releasing spring pressure. (9) Remove spring (9). (10) Remove water side diaphragm (8). (11) Remove pad retaining screw (10). (12) Remove pad (11). (13) Remove dosage control knob (12). (14) Remove and discard preformed packing (13). (15) Remove screw (14), dial cover (15), and dial gear (16). (16) Remove dial holder screw (17), dial holder (18), and star washer (19). 5-4







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