TM 10-4610-241-24
TO 40W4-13-42
2-61.
LIQUID HEADS (CHEMICAL FEED PUMP) REPAIR - continued .
b.
Disassembly.
(1) Unscrew and remove barbed fittings (13) and (14).
(2) Unscrew check valve body (15) and remove poppet (16) and packing (17).
(3) Unscrew check valve body (18) and remove poppet (19) and packing (20).
c.
Cleaning.
(1) Wash all components with clean water and detergent.
(2) Rinse components in clean water and dry with wiping rags.
(3) Clean liquid head housing (21), removing all dirt particles and contaminants. Pay close attention to poppet
seats. Even small particles of dirt in this area can affect operation of pump.
d.
Inspection.
(1) Inspect all threaded components for damaged threads.
(2) Inspect liquid head housing (21) for clogged passages.
(3) Inspect barbed fittings (13 and 14) for deformation.
(4) Inspect poppets (16 and 19) for wear, deterioration and damage.
e.
Repair.
(1) Replace damaged/unserviceable components.
(2) Replace pre-formed packing (17 and 20).
f.
Assembly.
(1) Position packing (20) and poppet (19) on check valve seat (18) and install on liquid head housing (21)
(2) Position packing (17) and poppet (16) on check valve seat (15) and install on liquid head housing (21)
NOTE
Be sure to wrap tape in the same direction as threads.
(4) Install barbed fittings (13 and 14) with anti-seize tape.
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