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TM 9-2320-364-20-2
2-1074
1. ENGINE OVERHEATS (WATER TEMP GAGE CONTINUOUSLY READS OVER
230F (110C) (CONT)).
2.
Clean radiator
(TM 750-254).
Verify repair, go to
Step 11 of this Fault.
YES
NO
Coolant hoses and clamps OK.
Radiator cooling fins clogged.
Fan does not operate at low
speed.
Fan does not operate at high
speed.
Water temperature gage faulty.
Cooling assembly faulty.
Thermostat(s) faulty.
Water temperature switch faulty.
Water temperature sensor faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Visual inspection.
Air flow to cool engine coolant
will be restricted if radiator
cooling fins are plugged with
debris.
3.
YES
NO
Coolant hoses and clamps OK.
Radiator cooling fins OK.
Fan does not operate at low
speed.
Fan does not operate at high
speed.
Water temperature gage faulty.
Cooling assembly faulty.
Thermostat(s) faulty.
Water temperature switch faulty.
Water temperature sensor faulty.
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Fan test.
If fan does not operate at low
speed any time engine is
running, fan circuit is faulty.
WARNING
Are radiator fins free from
dirt, mud and other debris?
Does fan operate at low
speed?
Read WARNING
on Page 2-1075
WARNING
Read WARNING
on Page 2-1075
Refer to Hydraulic
System
Troubleshooting (Para
2-31, Fault 6).
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