TM 10-4320-303-13
Table 2-7. Operator Preventive Maintenance Checks and Services for TWDS.
Location
Item
No.
Interval
Item to
Check/Service
Procedure
Not Fully
Mission Capable
if:
LEAD PUMPING
STATION
1
Before
Suction Hose
Assembly
Inspect for damage, leaks, and loose
connections. Tighten loose
connections. If hose is damaged or
Class III leaks are present, notify
supervisor.
Hose is damaged or collapsed.
Class III leak. Connection is
loose.
2
Before
6 Inch Butterfly
Valve
Ensure butterfly valves on hose
assemblies are in open position. If
valve will not open, notify supervisor.
Ensure butterfly valve on bypass hose
assembly is closed when not in use. If
valve will not close, notify supervisor.
Valve on suction and discharge
hoses will not fully open. Valve
on bypass hose assembly is
open.
3
Before
Check Valve
Ensure check valve is
Check valve is
installed properly. Arrow on
not installed
body casing must point in
properly.
direction of water flow. If
Connection is
valve is not installed
loose. Class
correctly notify supervisor.
III leak.
Inspect for leakage and loose
connections. Tighten loose
connections. If Class III
leak is present, notify
supervisor.
4
Before
Discharge Hose
Inspect for damage, leaks,
Hose is damaged
Assembly
and loose connections.
or collapsed.
Tighten loose connections.
Class III leak.
If hose is damaged or Class
Connection is
III leak is present, notify
loose.
supervisor.
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