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TM 9-4110-257-14
CHAPTER 5
DIRECT SUPPORT MAINTENANCE INSTRUCTIONS
SECTION I. DIRECT SUPPORT TROUBLESHOOTING INSTRUCTIONS
5-1.TROUBLESHOOTING.
The following procedures are listed in order of the most probable malfunctions. Each malfunction is followed by test or
inspection procedures in logical order to isolate and identify the fault and actions required to correct it. This section
cannot list all the possible malfunctions that may occur with the equipment. If a malfunction occurs that is not listed or
actions listed do not correct a malfunction, notify your supervisor.
a.
Engine Cranks But Will Not Start Or Stops During Operation.
CLEAN AND TEST INJECTOR NOZZLES (PARA. 5-39).
REPLACE IF NEEDED. DOES ENGINE START/RUN
(PARA. 2-5)?
YES
NO
PUT UNIT BACK INTO SERVICE.
TEST INJECTION PUMPS (PARA. 5-40). REPLACE IF
NEEDED.
b.
Pressure Gage Indicates Above Operating Range.
INSTALL SERVICE MANIFOLD (PARA. 5-6) AND
OPERATE REFRIGERATION UNIT (PARA. 2-5). DOES
SERVICE MANIFOLD GAGE READING MATCH
PRESSURE GAGE READING?
YES
NO
CHECK REFRIGERANT SYSTEM PRESSURE
REPLACE PRESSURE GAGE (PARA. 5-16).
(PARA. 5-13). IS SYSTEM OVERCHARGED?
YES
NO
ADJUST REFRIGERANT CHARGE
REPLACE DEHYDRATOR (PARA. 5-14).
AS NECESSARY (PARA. 5-12).
5-1
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