ARMY TM 10-4610-309-14
MARINE CORPS TM 10802A-14/1
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TACTICAL WATER PURIFICATION SYSTEM (TWPS)
UNIT MAINTENANCE PROCEDURES
REVERSE OSMOSIS SYSTEM
NOTE
Be sure the gasket is positioned in the center as the cap screws are tightened.
g. Tighten the pump outlet flange nuts and cap screws.
h. Tighten the pump inlet flange nuts and cap screws.
i. Feed the tagged pump power cable wires and box connector through the bottom of the
pump terminal box.
j. Screw the lock nut onto the box connector to secure the power cable to the box.
k. Reconnect the tagged pump power cable wires to the tagged motor wires.
l. Secure the terminal box cover gasket and cover to the pump motor terminal box using
the two cap screws.
3. Place the pump back into service and inspect it for leaks.
RO Feed Pump P-4 Drain Valve V-211 Replacement:
Parts (TM 10-4610-309-24P):
RO Feed Pump P-4 Drain Valve
Material:
Tape, antiseizing (WP 0079, Table 1, item 43)
Equipment Condition:
TWPS in Standby Shutdown With Drain-Down
Army: Generator off and TWPS main breaker off
Marine Corps: TWPS disconnected from power source
Replace RO Feed Pump P-4 Manual Drain Valve V-211 as follows (see Figure 4).
WARNING
The TWPS must be in Shutdown and the TQG and TWPS main breaker must be off
(Army) or the TWPS disconnected from its power source (Marine Corps) prior to
removing or installing the RO feed pump. Failure to observe this warning can
result in injury or death from electrocution or damage to equipment.
1. Make sure the TWPS is in Standby Shutdown With Drain-Down.
2. Remove the pump/motor assembly from the TWPS skid. Refer to REPLACE and RO Feed
Pump P-4 Pump/ Motor Assembly Replacement.
3. Remove the drain hose from the drain valve.
4. Unscrew the drain valve from the street elbow. Discard the valve.
5. Clean off any tape residue remaining on the threads of the street elbow pipes.
6. Wrap antiseizing tape on the elbow pipe threads and screw the street elbow into the pump
casing. Make sure the elbow, drain valve, and hose are facing in the same direction as the pump
discharge flange.
7. Attach the drain hose to the valve outlet.
8. Install the RO Feed Pump P-4 Assembly onto the TWPS skid. Refer to REPLACE and RO Feed
Pump P-4 Pump/ Motor Assembly Replacement.
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