TM 10-4610-310-14
OPERATOR MAINTENANCE
LIGHTWEIGHT WATER PURIFIER
TROUBLESHOOTING PROCEDURES
HIGH-PRESSURE PUMP MODULE
GENERAL
The table lists the common malfunctions that you may find during the operation or maintenance of the
Lightweight Water Purifier (LWP) high-pressure pump module or its components. You should perform the
tests/inspections and corrective actions in the order listed.
This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If a
malfunction is not listed or is not corrected by listed corrective actions, notify your supervisor.
MALFUNCTION
TEST / INSPECTION
CORRECTIVE ACTION
Inspect petcock on fuel tank.
Open petcock by setting it to "O" or
Ensure it's open.
vertical position
Ensure correct fuel. Refill if
Ensure supply of clean/correct fuel.
necessary (diesel, JP8).
Inspect fuel strainer. Notify unit
Clean the fuel strainer. Replace
maintenance. (WP 0093 00)
fuel filter if necessary (WP 0093
Inspect fuel filter.
Check if emergency shutoff valve is
Emergency shutoff valve opens up
open. (WP 0009 00)
automatically. If not proceed to step
2 to troubleshoot.
1. Engine will not start
Inspect/replace air filter. (WP 0042
Inspect engine air filter for clogging
Ensure that the engine is primed.
Prime the engine. (WP 0009 00)
Ensure throttle cable is pulled out.
Inspect throttle cable for loose
Tighten loose connections.
connections, binding and general
Replace if faulty. (WP 0099 00).
operation.
Notify unit maintenance.
Inspect the air pressure gauge for
Fill to 30 psi. Tighten connections
proper charge. Inspect for air leaks
if necessary.
2. Air shutoff valve will not open
Ensure that power is supplied to
Turn on circuit breaker CB1. Check
automatically (The air shutoff valve
the air solenoid switch. Check the
the TQG for proper operation (TM
is equipped with a manual override
control panel switches.
9-6115-639-13).
feature to enable continued
operations during emergency (WP
If the valve doesn't open up with
the tank full troubleshoot level
Ensure that the UF filtrate tank is
full
switch (WP 0062 00). Notify unit
maintenance.
Open the RO reject valve. Inspect
the hoses and connections for
Ensure that the high-pressure
blockage. Press high pressure
switch is not activated
reset button on the control panel to
restart. Troubleshoot pressure
switch (WP 0067 00).
Rotate the T-handle to check for
Inspect the shutoff assembly for
binding and corrosion. Clean and
binding and corrosion
lubricate if necessary.
0029 00-1
