TM 10-4320-310-14
Table 3-1. Operator Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10. PUMP FAILS TO PRIME
Step 1.
Check for low engine speed.
Move throttle control hand lever to left past the stop.
Step 2.
Check for air-locked pump.
Vent the pump housing and fill with flammable liquid (para 2-4.b).
Step 3.
Check for leaks at the suction (intake) flange and gasket.
Replace gasket.
11. NOISY PUMP OPERATION
CAUTION
Excessive pump noise can Indicate that pump is running dry. This
condition can cause serious pump damage.
Step 1.
Check that suction hose is properly connected to container from which flammable
liquids being pumped. Flammable liquid level in container shall be above suction
hose connection.
Step 2.
Check suction hose and coupling for foreign material.
With engine stopped and suction hose removed, inspect interior of suction hose
and suction (intake) coupling for foreign material or obstruction.
Step 3.
Check suction hoses, connections, or suction coupling interface for leaks.
Step 4.
Check that pump has been properly primed.
If necessary, prime the pump (para 2-4.b).
Step 5.
Notify unit maintenance.
12. LOW DISCHARGE PRESSURE
Step 1.
Check for low engine speed.
Move throttle control hand lever to left past the stop.
Step 2
Check suction (intake) line for leaking connections.
Tighten loose connections.
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