TM 5-4320-302-14
Section IV. TROUBLESHOOTING
4-9. TROUBLESHOOTING
a. Table 4-2 contains troubleshooting information for locating and correcting most of the operating
troubles which are the responsibility of organizational maintenance. Each malfunction for an individual
component, unit, or system is followed by a list of tests or inspections which will help you to deter-
mine probable causes and corrective actions to take. Perform the tests/inspections and corrective
actions in the order listed.
b. 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.
c. Only those functions within the scope of organizational maintenance are listed. For troubleshoot-
ing procedures within the scope of operator/crew maintenance, refer to table 3-1.
4-10. SYMPTOM INDEX
Refer to the Symptom Index below. Locate the malfunction which is the same, or most nearly the
same, as the trouble you are having with the centrifugal pump unit. The Symptom Index lists the
first page of troubleshooting information for that malfunction. Follow the steps one by one, and per-
form the corrective actions listed.
Malfunction
Number
Description
Page
1
Engine fails to crank or cranks very slowly
4-26
2
Engine cranks but fails to start
4-29
3
Engine runs unsteadily and power output is low
4-38
4
Dense smoke from exhaust valve after warm-up
4-39
5
Engine overheats
4-40
6
Low engine oil pressure
4-41
7
Charging indicator lamp lights when engine is running
4-44
8
Pump makes excessive noise
4-44
9
Pump output low
4-45
4-25
