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Page Title:
ENGINE OIL PRESSURE BELOW NORMAL - continued |
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 TM 10-3930-673-20-1
11. ENGINE OIL PRESSURE BELOW NORMAL (CONT).
2
KNOWN INFO
TEST OPTIONS
Indicated engine oil pressure is
Visual inspection.
Is engine coolant temperature
below normal 30 to 90 PSI
REASON FOR QUESTION
within normal 180 to 210
operating range.
If engine coolant temperature is
degrees F operating range?
LOW OIL PRESSURE light is ON.
above normal, see Fault 13,
Engine oil level OK.
Engine water temperature above
POSSIBLE PROBLEMS
normal Troubleshooting Section.
Engine coolant temperature is
above normal.
Engine filter blocked.
Engine oil grade incorrect.
Oil pressure switch faulty.
Oil pressure gage faulty.
See Fault 13, Engine
water temperature
NO
above normal
Troubleshooting
Section.
YES
3
KNOWN INFO
TEST OPTIONS
Indicated engine oil pressure is
Visual inspection.
Does engine oil flow freely
below normal 30 to 90 PSI
REASON FOR QUESTION
through engine oil filter?
operating range.
If engine oil filter is dirty or blocked,
LOW OIL PRESSURE light is ON.
engine oil pressure will be low.
Engine oil level OK.
Engine coolant temperature OK.
POSSIBLE PROBLEMS
Engine filter blocked.
Engine oil grade incorrect.
Oil pressure switch faulty.
Oil pressure gage faulty.
Replace engine oil
NO
filter (Para 4-2).
YES
2-668
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