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ENGINE OIL PRESSURE BELOW NORMAL - continued - TM-10-3930-673-20-10721
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ENGINE OIL PRESSURE BELOW NORMAL - continued - TM-10-3930-673-20-10723
TM 10-3930-673-20-1
11. ENGINE OIL PRESSURE BELOW NORMAL (CONT).
4
KNOWN INFO
TEST OPTIONS
Indicated engine oil pressure is
Sample, analysis.
Is engine oil of correct grade
below normal 30 to 90 PSI
REASON FOR QUESTION
for working environment
operating range.
If engine oil grade is incorrect,
(normally: OE/HDO-15/40)?
LOW OIL PRESSURE light is ON.
engine oil pressure will be low.
Engine oil level OK.
Engine coolant temperature OK.
Engine oil filter OK.
POSSIBLE PROBLEMS
Engine oil grade incorrect.
Oil pressure switch faulty.
Oil pressure gage faulty.
Replace engine oil
NO
with oil of correct
grade (Para 4-2).
YES
5
KNOWN INFO
TEST OPTIONS
Indicated engine oil pressure is
STE/ICE Test #50.
Is engine oil pressure within
below normal 30 to 90 PSI
REASON FOR QUESTION
range of 30 to 90 PSI (at
operating range.
If engine oil pressure sensor/gage
normal engine coolant
LOW OIL PRESSURE light is ON.
faulty, engine oil pressure will be
Engine oil OK.
temperature of 140 to
low.
Engine coolant temperature OK.
210 degrees F)?
Engine oil filter OK.
Engine oil grade OK.
POSSIBLE PROBLEMS
Oil pressure switch faulty.
Oil pressure gage faulty.
Notify Direct
NO
Support about this
fault.
YES
Refer to Electrical
System Troubleshooting
Fault 39, Oil pressure
gage does not operate.
2-670

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