stations are operating in the electric automatic mode, perform PMCS on the trailer mounted pump assemblies at
a minimum of every three hours.
o. Ensure that during all phases of operation, operators at the pumping stations and storage assemblies
communicate with each other. Report any unusual situations or difficulties immediately.
(1) Ensure operators report low suction pressure or high discharge pressure and take corrective
action immediately.
(2) Ensure storage assembly operators report the beginning and completion of tank filling
operations.
(3) Ensure operators at the lead pump station track the status of the advancing water column during
packing operation. During start-up, they should monitor overall performance of the system.
p. Ensure drip pans are available for each pump to catch any oil or fuel leaks.
q. If the storage tank rolls when being filled, place sandbags along the edge of the rank to prevent
further rolling. Take corrective action if needed. Whenever a storage tank is being filled, inform operators at
the downline pumping stations to expect a reduction in hose line pressure. The reduction in pressure may cause
the engines on the downline stations to reduce speed.
r. Determine the proper hypochlorite solution strength before placing a distribution site in operation.
Make adjustments to the hypochlorination unit to gain the required chlorine residual.
s. Conduct chlorine residual monitoring at frequent intervals at all receiving, issuing, and distribution
points to see if desired residual is being maintained.
t. Ensure soldiers are using DA Form 1714-R and the DA Form 1714-1-R to account for issuing,
receiving, and dispatching of water.
11. Monitor the following procedures to ensure your subordinates properly supervise TWDS disassembly and
repacking. Preparing the TWDS for movement requires removing the water from the system. shutting down
and disassembling major components. and repacking major components. Soldiers must:
a. Remove water at the lead pump station first, then move down the line to the last boost pumping
station. After hose line water has been removed, empty the storage tanks and begin to disassemble major
components.
b. To begin emptying the hose line, shut down the lead pump. Close the butterfly valves on the suction
and discharge ports of the lead pump. Continue to run the down line pumps.
c. If boost pumps are operated in the manual or electric manual mode, monitor the suction at the
suction ports. Allow the first boost pump to operate until the suction pressure drops below 20 PSI. At that time
manually decrease the engine speed. When suction pressure reaches 10 PSI, shut down the pump. Isolate the
pump assembly from the hose line by opening the butterfly valve on the bypass system and closing the butterfly
valves on the suction and discharge hoses. Repeat the procedure on each discharge pump.
d. If boost pumps are operated in the electric automatic mode, the engine speed will automatically
decrease to idle as the suction pressure reduces to 10 PSI. Shut down the first
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QM4918
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