TM 10-4610-240-24
TM 08580C-24/2
TO 40W4-13-22
2-69. DIAPHRAGM PUMPS (CHEMICAL FEED PUMP) MAINTENANCE - continued.
REPAIR
a. Disassembly.
(1) Unscrew adapter (39) from valve body (35).
(2) Remove o-ring (38), ball stop (36), and valve ball (37) from adapter (39).
(3) Unscrew valve body (35) from reagent head (3).
(4) Remove o-ring (34), ball stop (32) and valve ball (33) from valve body (35).
(5) Unscrew adapter (22) from valve body (26) and remove o-ring (23).
(6) Unscrew valve body (26) from valve body (30).
(7) Remove o-ring (27), ball stop (24), and valve ball (25) from valve body (26).
(8) Unscrew valve body (30) from reagent head (3).
(9) Remove o-ring (31), ball stop (28), and valve ball (29) from valve body (30).
b. Cleaning.
(1) Wash all components with clean water and detergent.
(2) Rinse components in clean water and dry with wiping rag.
(3) Clean valve body (26, 30, and 35) passages. Remove all dirt, particles, and contaminates. Pay close attention
to valve ball seats. Even small particles of dirt in this area can effect operation of diaphragm pump.
c. Inspection.
(1) Inspect all threaded components for damaged threads
(2) Inspect valve bodies (26, 30, and 35) for clogged passages.
(3) Inspect working diaphragm (8) and guard diaphragm (13) for holes, cracks, and deterioration.
(4) Inspect backing plate (9) for corrosion.
(5) Inspect valve balls (25, 29, 33, and 37) for flat spots and irregular surface.
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