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Page Title:
TRANSMISSION OIL TEMPERATURE ABOVE NORMAL - continued |
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 TM 10-3930-673-20-1
15. TRANSMISSION OIL TEMPERATURE ABOVE NORMAL (CONT).
2
KNOWN INFO
TEST OPTIONS
Indicated transmission oil
Visual inspection.
Is engine coolant at proper
temperature is continuously
REASON FOR QUESTION
level (1/3 to 2/3 full) in
above 250 degrees F.
If engine coolant level low, engine
overflow tank?
High transmission oil temperature
will run hot.
warning light is ON.
Transmission oil level OK.
POSSIBLE PROBLEMS
Engine coolant level low.
Main hydraulic pressure low.
Transmission oil lines/cooler
obstructed, leaking.
Transmission oil filter dirty,
obstructed.
Vehicle brakes dragging.
Add coolant as
NO
needed (Para 7-2).
YES
3
KNOWN INFO
TEST OPTIONS
Indicated transmission oil
Visual inspection.
Do hydraulic functions (boom
temperature is continuously
REASON FOR QUESTION
cylinder and attachment
above 250 degrees F.
If hydraulic functions operate
cylinders, for example)
High transmission oil temperature
slowly and/or jerk, hydraulic
warning light is ON.
operate smoothly, without
pressure is low.
Transmission oil level OK.
hesitation?
Engine coolant level OK.
POSSIBLE PROBLEMS
Main hydraulic pressure low.
Transmission oil lines/cooler
obstructed, leaking.
Transmission oil filter dirty,
Possible low hydraulic
obstructed.
pressure. Refer to the
Vehicle brakes dragging.
Hydraulic
NO
Troubleshooting
Section to correct
fault.
YES
2-694
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