Table 2-3 contains troubleshooting information for locating and correcting most of the operating troubles
which are the responsibility of unit maintenance. Each malfunction for an individual component, unit, or
system is followed by a list of tests or inspections which will help you to determine probable causes and
corrective actions to take. Perform the test/inspections and corrective actions in the order listed.
This manual cannot list all malfunctions that may occur, nor all tests or inspections and corrective actions. If
a malfunction is not listed or cannot be corrected by listed corrective actions, notify your supervisor.
Only those functions within the scope of unit maintenance are listed. For troubleshooting procedures within
the scope of operator/crew maintenance, refer to TM 10-4320-307-10.
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 pumping assembly. The Symptom Index lists the first page of
troubleshooting information for that malfunction. Follow the steps one by one and perform the corrective actions listed.
Engine fails to crank or cranks very slowly
Engine cranks but fails to start
Engine runs unsteadily and power output is low
Engine starts but pump suction gage or pump discharge gage does not function
Dense exhaust smoke after warmup
Engine overheats according to engine coolant temperature gage
Low engine oil pressure
Charging indicator lamp (ALTERNATOR) lights when engine is running
Pump makes excessive noise
Pump output low
Excessive speed increaser noise during shifting
Speed increaser oil leakage
Speed increaser does not respond to shift lever movement
Oil thrown from filler tube
Excessive pump noise
Excessive pump vibration.