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TM 10-4930-232-12&P
4-8. PMCS Procedures. Refer to Chapter 2, Section II for a description and listing of the necessary
preventive maintenance checks and services and the intervals at which these checks and services shall be
performed.
Section IV. UNIT TROUBLESHOOTING PROCEDURES
Paragraph
Page
4-9
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4-3
4-10
Unit Troubleshooting Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...4-3
4-9. General. This section contains troubleshooting procedures to determine the probable cause of observed
equipment malfunctions. Tests or inspections are provided to isolate the faulty component and corrective actions
are provided to eliminate the malfunction.
4-10. Unit Troubleshooting Procedures. Refer to the symptom index to locate the troubleshooting
procedure for the observed malfunction. Table 4-1 contains a listing of the common malfunctions that may occur
during the operation or maintenance of the pump assembly. Perform the tests or inspections, and the
recommended corrective action, in the order listed in the troubleshooting table. If the malfunction is corrected by a
specific corrective action, do not continue with the remaining steps, if any, of the troubleshooting procedure. If the
malfunction is not corrected by the listed corrective actions, notify your supervisor.
SYMPTOM INDEX
Symptom
Page
Pump fails to operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . .. 4-4
Filter/separator inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Fuel leaks at couplings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-4
Gate valve leaks or is inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-4
Quick-acting valve leaks or is inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Nozzle leaks or is inoperative . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
4-3
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