KNOWN INFO
REASON FOR QUESTION
KNOWN INFO
TEST OPTIONS
REASON FOR QUESTION
YES
YES
POSSIBLE PROBLEMS
Is water pump free
from leaks or damage?
Replace water pump
(para 6-12).
4.
5.
POSSIBLE PROBLEMS
Replace transmission
oil cooler (para 8-10).
d3. LOSS OF COOLANT (CONT)
NO
NO
Radiator OK.
Radiator overflow tank OK.
All coolant hoses and tubes
OK.
Engine oil cooler free from
external leaks or damage.
Transmission oil cooler free
from external leaks or damage.
TEST OPTIONS
Visual Inspection
Leaking or damaged water
pump will cause a loss of
coolant.
Visual Inspection
Leaking or damaged
transmission oil cooler
will cause a loss of coolant.
Notify DS Maintenance.
Faulty water pump.
Faulty transmission oil cooler.
Radiator OK.
Radiator overflow tank OK.
All coolant hoses and tubes OK.
Engine oil cooler free from
external leaks or damage.
Transmission oil cooler free
from external leaks or damage.
Water pump OK.
Is transmission oil dipstick
free of any signs of being
over HOT FULL line,
discolored, or milky?
TM 9-2320-365-20-1
2-144.4 Change 1
Faulty transmission oil cooler.
