ARMY TM 9-6115-672-14
AIR FORCE TO 35C2-3-444-32
MARINE CORPS TM 09244A/09245A-14
5-2
SECTION III. TROUBLESHOOTING
5.3
GENERAL.
This section contains troubleshooting information for locating and correcting operating troubles which may
develop in the generator set. Each malfunction for an individual component unit or system is followed by a
list of tests or inspections which will help to determine probable causes and corrective actions to take.
Perform the tests/inspections in the order listed.
Table 5-1 is provided for direct support troubleshooting. This table 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.
NOTE
Before using this table, PMCS and lower level troubleshooting must be
performed.
NOTE
Refer to paragraph 2.4 for diagnostic controls and indicators.
SYMPTOM INDEX
Page
Engine Cranks, But Fails To Start ..............................................................................................................................5-3
Engine Runs Erratically or Stalls Frequently..............................................................................................................5-4
Engine Does Not Develop Full Power........................................................................................................................5-4
Abnormal Engine Noise..............................................................................................................................................5-5
Black or Gray Exhaust Smoke....................................................................................................................................5-6
Blue or White Exhaust Smoke....................................................................................................................................5-6
Engine Misfiring.........................................................................................................................................................5-7
Coolant In Crankcase or Oil In Coolant......................................................................................................................5-7
Generator Set Fails To Generate Sufficient Voltage...................................................................................................5-8
Generator Set Output Fluctuates.................................................................................................................................5-9
Generator Noisy When Running...............................................................................................................................5-10
Engine Oil Pressure Low ..........................................................................................................................................5-11
Engine Oil Pressure High .........................................................................................................................................5-11
FAULT INDICATOR Displays WARNING - UNDERVOLTAGE or CONTACTOR TRIP -
UNDERVOLTAGE...........................................................................................................................................5-12
FAULT INDICATOR Displays SHUTDOWN - OVERSPEED..............................................................................5-13
