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Page Title:
LOW ENGINE OIL PRESSURE (LESS THAN 5 PSI [34 KPA] AT IDLE, LESS THAN 40 PSI [276 KPA] DURING NORMAL OPERATION). (Cont) |
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 TM 9-2320-364-34-1
3. LOW ENGINE OIL PRESSURE (CONT).
3.
KNOWN INFO
TEST OPTIONS
WARNING
Read WARNING
Unit Troubleshooting tasks
Oil pressure relief valve
on Page 2-75
completed.
inspection.
Oil pickup tube and pickup tube
intake screen OK.
REASON FOR QUESTION
Is oil pressure relief valve
Oil pressure regulator valve OK.
inside plunger sticking open?
If pressure relief valve sticks
open, oil pressure can be low.
POSSIBLE PROBLEMS
Oil pressure relief valve faulty.
Oil pump faulty.
Oil cooler adapter plugged.
Clean or replace oil
pressure relief valve
NO
(Para 3-28).
Verify repair, go to
Step 6 of this Fault.
YES
4.
KNOWN INFO
TEST OPTIONS
Unit Troubleshooting tasks
Visual inspection.
Is oil pump free of damage?
completed.
Oil pickup tube and pickup tube
REASON FOR QUESTION
intake screen OK.
Oil pressure regulator valve OK.
If oil pump gears are worn or
Oil pressure relief valve OK.
damaged, they will not pump
enough oil to maintain correct
POSSIBLE PROBLEMS
operating pressure.
Oil pump faulty.
Oil cooler adapter plugged.
Replace oil pump
(Para 3-26).
NO
Verify repair, go to
Step 6 of this Fault.
YES
2-74
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