TM 9-2320-366-34-1
2-18
NO
YES
NO
YES
Oil pressure may be low if
there is suction loss or air
leakage into oil pump.
Is oil pickup tube bolted
securely to engine block
and free from restrictions
or damage?
Oil Pump Pickup Tube
Inspection
Oil Pressure Relief
Valve Inspection
Oil pressure may be
low if plunger inside
relief valve is sticking
or oil pump is damaged.
2.
Engine oil level OK.
Oil pressure gage OK.
Engine oil filter and
oil lines OK.
Sending unit OK.
Rocker arms and
push rods OK.
Plugged, damaged or
loose oil pickup tube.
Faulty oil pressure
relief valve.
Faulty oil pump.
3.
Engine oil level OK.
Oil pressure gage OK.
Engine oil filter and
oil lines OK.
Sending unit OK.
Rocker arms and
push rods OK.
Oil pump pickup tube OK.
Faulty oil pressure
relief valve.
Faulty oil pump.
Is oil pressure relief
valve functioning
properly or oil pump
free of damage?
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Secure oil pump pickup tube
if loose, clear restrictions
and replace oil pump pickup
tube if damaged (para 3-17).
KNOWN INFO
POSSIBLE PROBLEMS
TEST OPTIONS
REASON FOR QUESTION
Replace oil pump
(para 3-17).
Replace engine assembly
(para 3-3).
a1. LOW ENGINE OIL PRESSURE (CONT)
