Section IV. UNIT TROUBLESHOOTING PROCEDURES

TM 10-4320-325-14

Section IV. UNIT TROUBLESHOOTING PROCEDURES

4-9.

GENERAL.

a. Common malfunctions, which may be found during operation or maintenance of the centrifugal

pump or its components, are listed in Table 4-4, Unit Troubleshooting. Tests/inspections and

corrective actions should be performed in the order that they appear.

b. In general, engine exhaust is an excellent way to identify the condition of the centrifugal pump.

Black or bluish-white exhaust color is normal as the engine warms. When the engine reaches

normal operating temperature, the exhaust smoke should become clear or light blue. If the

exhaust smoke does not change to an acceptable color, a problem may be present.

c. When exhaust color is abnormal, turn off engine immediately and notify your supervisor. Use

Table 4-3, Troubleshooting Exhaust Color, as a guideline to identify exhaust symptoms.

Table 4-3. Troubleshooting Exhaust Color

Clear or light bluish condition

Normal operating

Continuous black smoke

Overloading

Seizure of moving part

Continuous bluish-white smoke

Lubricating oil is being consumed

d. This manual cannot list all malfunctions that may occur, nor all tests and corrective actions. If a

malfunction is not listed, or is listed incorrectly, notify your supervisor.

Note

Make sure all applicable Operator and Unit PMCS have been performed

before referring to Table 4-4.