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Item
No.
2
TM 5-4320-304-14
TM 08922A-14/1
Table 4-1. Organizational Preventive Maintenance Checks and Services – Continued
Interval
W
M
l
W-Weekly
M-Monthly
Item To Be
Inspected
Q
S
Check Valve
Assembly
Procedures
Q-Quarterly
S -Semiannually
Equipment is
Not Ready/
Available If:
Inspect suction (intake) flange (1) for cracks,
damaged threads, or studs. Check that nuts
(2) are tight and free of corrosion.
Inspect check valve assembly (3) for evidence
of leakage or gasket (4) damage, and presence
of outer check valve weight (5). Screw (6)
should be tight. All components shall be free
of corrosion. When in closed position, gasket
shall appear to make an airtight seal on pump
outlet. Gasket shall be free to open with
pump flow.
Check valve
assembly is
cracked or
not airtight.
4-7
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