TM 55-2210-223-12
TO 45A2-2-14-41
Section IV. UNIT TROUBLESHOOTING
4-7
GENERAL.
This section contains testing and troubleshooting information for locating and correcting most of the operating troubles
which may develop in the locomotive. Each malfunction for an individual component, unit, or system is followed by a list
of tests or inspections which will help you determine corrective action to take. You should perform the test/inspections
and corrective actions in the order listed.
4-8 TROUBLESHOOTING PROCEDURES.
The symptom index lists the common malfunctions which you may find during the operation or maintenance of the
locomotive or its components. Use the symptom index for quick access to the troubleshooting procedures in table 4-2.
This manual cannot list all possible malfunctions that may occur, nor all tests or inspections and corrective actions. If a
malfunction is not listed (except where malfunction and cause are obvious) or is not corrected by listed corrective
actions, notify intermediate direct support maintenance.
SYMPTOM INDEX
Troubleshooting
Procedure
Symptom
Page
AUXILIARY ELECTRICAL SYSTEM
Failure of battery charging circuit .......................................................................................................................4-11
COOLING SYSTEM
Engine overheating .............................................................................................................................................4-12
ELECTRICAL INSTRUMENTS AND CONTROLS
Faulty operation of electrical contactors .............................................................................................................4-13
Faulty operation of interlocks or control fingers ..................................................................................................4-13
ENGINE
Engine cranks but fails to start ...........................................................................................................................4-14
Engine does not crank ........................................................................................................................................4-15
Engine skips or misses .......................................................................................................................................4-16
Engine stops while in operation ..........................................................................................................................4-16
LUBRICATING SYSTEM
Low lube oil pressure ..........................................................................................................................................4-17
MAIN GENERATOR
Main generator flashover ....................................................................................................................................4-17
SANDING SYSTEM
Sanding system does not work ...........................................................................................................................4-17
LIGHTS
Headlights do not operate with headlight switch in the ON position .....................................................................4-18
Cab, engine compartment, and step lights do not operate with switch
in the ON position ..............................................................................................................................................4-18
4-10
