TM 5-3825-225-14&P
Table 3-1. Operator/Crew Troubleshooting (Con’t).
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3.
Check fan belts.
Notify unit maintenance if adjustment is necessary.
9.
OIL PRESSURE IS LOW.
Check for low oil level in engine crankcase.
Add proper grade of oil (see Chapter 3, Section I).
10.
ENGINE IS OVERLOADED.
Step 1.
Ensure that the pump is not working against closed valve.
Step 2.
Ensure that the sprinkler valves (F and G, Figure 2-3) are not clogged.
11.
TANK WILL NOT FILL.
Step 1.
Ensure that the discharge valve (A, Figure 2-3) is closed and the inlet valve (B) is open.
Step 2.
Ensure that there is water in the pump housing.
Fill the pump housing as necessary.
Step 3.
Check the foot valve strainer (6, Appendix F, Figure 39) in suction hose for debris.
Remove the foot valve strainer and clean the debris.
Step 4.
Check the pump strainer (14, Appendix F, Figure 83) for debris.
Remove strainer (14) from tee (15) and clean.
Step 5.
Check the suction hose and fittings for damage or leaks.
Replace the fittings if they are damaged or leaking.
Replace the hose if it collapses when the pump starts.
12.
PUMP SUDDENLY OR GRADUALLY STOPS PUMPING.
Check the pump or foot valve strainers for clogging.
WARNING
Do not stand In front of the pump while disconnecting the hose. If the pump runs for a time with a plugged line,
it will generate enough heat to cause severe burns. Stand to one side of the pump and disconnect the camlock
fitting with a long-handled Instrument.
Remove and clean the hose and pump strainer (14, Appendix F, Figure 83).
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