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TM 5-4320-313-14
CHAPTER 5
DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
Section I Troubleshooting
Section II Maintenance Procedures
Section I. TROUBLESHOOTING
Para.
Para.
Introductory Information.............................................5-1
Symptom Index..........................................................5-2
Troubleshooting...................................................5-3
5-1. INTRODUCTORY INFORMATION.
a. Table 5-1 lists the common malfunctions which you may find during the maintenance of the pump assembly or its
components. You should 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 the listed corrective actions, notify your supervisor.
5-2. SYMPTOM INDEX
MALFUNCTION
MALFUNCTION
PAGE
NO.
5
Engine cranks but fails to start............................................................... 5-3
7
Engine produces black smoke from exhaust.......................................... 5-4
6
Engine starts but stalls or surges............................................................ 5-3
4
Low pump discharge pressure................................................................ 5-3
3
Pump fails to prime................................................................................ 5-2
1
Pump makes excessive noise................................................................ 5-1
2
Pump output low ................................................................................... 5-2
5-3. TROUBLESHOOTING. (Refer to table 5-1).
Table 5-1. Direct Support Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. PUMP MAKES EXCESSIVE NOISE.
Step 1. With engine stopped, check pump housing suction intake for foreign material.
5-1
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