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 TM 9-2320-285-24-1
2-8.
ENGINE TROUBLESHOOTING (CONT)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6.
LOW ENGINE OIL PRESSURE
Step 1.
Check if OIL PRESSURE warning lamp lights and OIL PRESS gage indicates low oil pressure.
a.
If OIL PRESSURE warning lamp lights, but OIL PRESS gage indicates normal oil pressure, OIL
PRESSURE warning lamp may be defective; troubleshoot (para 2-19). If OIL PRESSURE warning
lamp is not defective, troubleshoot OIL PRESS gage (para 2-83). Then go to step 2 below.
b.
If OIL PRESS gage indicates low oil pressure, but OIL PRESSURE warning lamp does not light, OIL
PRESS gage may be defective; troubleshoot (para 2-83). If OIL PRESS gage is not defective,
troubleshoot OIL PRESSURE warning lamp (para 2-19). Then go to step 2 below.
c.
If OIL PRESS gage indicates low oil pressure and OIL PRESSURE warning lamp lights, go to step 3
below.
Step 2.
After troubleshooting in steps la or lb above has restored agreement between OIL PRESSURE warning
lamp and OIL PRESS gage, check OIL PRESSURE warning lamp and OIL PRESS gage indications.
a.
If OIL PRESSURE warning lamp lights and OIL PRESS gage indicates low oil pressure, go to step 3
below.
b.
If OIL PRESSURE warning lamp does not light and OIL PRESS gage indicates normal pressure, no
further action is required.
Step 3.
Check engine oil level.
a.
If oil level is too low, add oil to FULL mark on dipstick (para 2-12b).
b.
If oil level is correct, go to step 4 below.
Step 4.
Check engine oil for dirty condition.
Remove dipstick, wipe it between thumb and forefinger and check if oil feels gritty and looks dirty.
a.
If oil feels gritty or looks dirty, drain engine oil (para 2-12b), replace engine oil filters (para 2-12c and 2-
12d), and refill crankcase with clean oil (para 2-12b).
b.
If engine oil does not feel gritty or look dirty, go to step 5 below.
2-26
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