d1. ENGINE OVERHEATS (CONT)
KNOWN INFO
TEST OPTIONS
NO
YES
Visual Inspection
REASON FOR QUESTION
POSSIBLE PROBLEMS
7.
Notify DS Maintenance.
Coolant level OK.
Radiator core free of debris.
WATER TEMP gage OK.
Radiator OK.
Upper and lower coolant hoses
OK.
Radiator cap OK.
Radiator overflow tank and
hoses OK.
Cooling system pressure OK.
Radiator fan shroud OK.
Charge air cooler OK.
Water pump OK.
Thermostat OK.
Does fan clutch spin freely
without air applied?
This question eliminates
possible problems and
determines where
troubleshooting continues.
Faulty fan clutch.
Perform Electrical System Troubleshooting
(e90. Engine Fan Runs Constantly).
TM 9-2320-365-20-1
2-138 Change 1