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TM 9-2320-364-20-3
2-2908
6. FAN SPEED DOES NOT LOWER FROM HIGH SPEED TO LOW SPEED.
INITIAL SETUP
1.
Does fan speed lower when
hydraulic selector switch is
put in AUTO or CRANE/SRW
position?
Go to Step 11 of this
Fault
START
YES
NO
Heater blower motor operates
CB15 OK.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Operation Test.
Isolate fault.
Tools and Special Tools
Tool Kit, General Mechanic’s: Automotive
(Item 74, Appendix G)
STE/ICE-R (optional) (Item 3, Appendix G)
Multimeter (Item 44, Appendix G)
Personnel Required
Two
Equipment Condition
Engine OFF, (TM 9-2320-364-10)
Parking brake applied, (TM 9-2320-364-10)
Wheels chocked, (TM 9-2320-364-10)
References
TM 9-2320-364-10
TM 9-4910-571-12&P
Materials/Parts
Adhesive (Item 8, Appendix C)
Lockwasher (22) (Item 157, Appendix F)
2-31. HYDRAULIC SYSTEM TROUBLESHOOTING (CONT).
Wire 1933 between MC59 and
MC128 faulty.
Wire 1932 between MC59 and
MC61 faulty.
Wire 1932 between MC61 and
MC128 faulty.
Temperature sensor faulty.
Wire 1538 faulty.
Wire 1435 from fan controller
faulty.
Wire 1935 or 1936 between
MC59 and MC76 faulty.
Temperature switch faulty.
Rectifier faulty.
Wire 1733 faulty.
Wire 1435 faulty.
Wire 1956 faulty.
Throttle position switch faulty.
Wire 1957 faulty.
Turbo boost pressure switch
faulty.
Wire 1955 faulty.
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