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TM 5-4320-308-13
Table 3-2. Unit Maintenance Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Shut down engine. With engine level, check oil level (para 3-1.).
Add oil if necessary.
Step 3.
Check muffler for obstruction.
Remove obstruction.
Step 4.
Notify intermediate maintenance.
6.
PUMP MAKES EXCESSIVE NOISE
Step 1.
Check volute for foreign material.
With engine stopped and suction hose removed, inspect interior of suction (intake) flange for foreign
material or obstruction.
CAUTION
Excessive pump noise can indicate that pump is running dry. This condition can cause serious
pump damage.
Step 2.
Check that suction hose is immersed in fuel or properly connected to container from which fuel is
being pumped. Fuel level in container shall be above suction hose connection.
Relocate suction hose connection below surface of fuel.
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