|
| |
TM 5-4320-308-13
Table 3-1. Unit Preventive Maintenance Checks and Services - Continued
B - Before Operation
A - After Operation
M - Monthly
D - During Operation
W - Weekly
INTERVAL
ITEM TO BE INSPECTED
Equipment is
Item
PROCEDURE
Not Ready/
No.
B
D
A
W
M
Available If:
15
Check Valve Assembly.
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) for damage, and presence of
outer check valve weight (5). Screw (6) should
be tight. All components shall be free of cor-
rosion. When in closed position, gasket shall
appear to make an airtight seal on pump outlet.
Gasket shall be free to open with pump flow.
3-23
|
