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 TM 9-2320-366-20-1
d1. ENGINE OVERHEATS (CONT)
KNOWN INFO
TEST OPTIONS
4.
Coolant level OK.
Visual Inspection
Radiator core free of debris.
Is water pump secure
REASON FOR QUESTION
WATER TEMP gage OK.
and free from damage?
Radiator OK.
If damage is present, water
Upper and lower coolant hoses
pump is faulty.
OK.
Radiator cap OK.
Radiator overflow tank and
hoses OK.
Cooling system pressure OK.
NO
Radiator fan shroud OK.
POSSIBLE PROBLEMS
Faulty water pump.
Faulty thermostat.
Tighten water pump
Faulty fan clutch.
hardware or replace water
YES
pump (para 6-12).
WARNING
Read WARNING
KNOWN INFO
TEST OPTIONS
on following page.
5.
Visual Inspection
Coolant level OK.
Radiator core free of debris.
Does thermostat operate
REASON FOR QUESTION
WATER TEMP gage OK.
properly?
Radiator OK.
If thermostat does not operate
Upper and lower coolant hoses
properly, thermostat is faulty.
OK.
Radiator cap OK.
Radiator overflow tank and
hoses OK.
Cooling system pressure OK.
NO
Radiator fan shroud OK.
Charge air cooler OK.
Water pump OK.
POSSIBLE PROBLEMS
Replace thermostat
YES
(para 6-5).
Faulty thermostat.
Faulty fan clutch.
2-144
Change 2
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