Low Engine Oil Pressure - Perkins NJ Series Troubleshooting Manual

SENR9982-01
3. The intake manifold pressure should read
0 ± 0.5 kPa (0 ± 0.07 psi). If the intake manifold
pressure is not within the limits, perform the
following steps.
4. Check the air filter restriction indicator, if equipped.
5. Ensure that the air filter is clean and serviceable.
6. Check the air intake and the exhaust system for
the following defects:
• Blockages
• Restrictions
• Damage to the air intake and exhaust lines and
hoses

Low Engine Oil Pressure

NOTICE
Do not operate the engine with low oil pressure.
Engine damage will result. If measured oil pressure is
low, discontinue engine operation until the problem is
corrected.
Probable Causes
• Engine oil level
• Oil specification
• Engine oil pressure gauge
•
Engine oil filter
• Engine oil cooler
• Piston cooling jets
•
Engine oil suction tube
• Engine oil pump
• Bearing clearance
Recommended Actions
Engine Oil Level
1. Inspect the engine oil level. If necessary, add oil.
2. If the fault is still apparent, refer to "Oil
Specification".
Oil Specification
1. Make sure that engine oil of the correct
specification is used. Refer to the Operation
and Maintenance Manual, "Refill Capacities and
Recommendations".
2. If necessary, drain the oil system and refill the oil
system with engine oil of the correct specification.
Refer to Operation and Maintenance Manual,
"Engine Oil and Filter - Change".
3. If the fault is still apparent, refer to "Engine Oil
Pressure Gauge".
Engine Oil Pressure Gauge
1. Check the actual engine oil pressure with a
calibrated test gauge. Compare the oil pressure
reading from the electronic service tool to the
i02528979
pressure on the test gauge.
2. If no difference is noted between the indicated oil
pressures, refer to "Engine Oil Filter".
Engine Oil Filter
1. Remove the engine oil filter. Refer to the Operation
and Maintenance Manual, "Engine Oil and Filter
- Change".
2. Inspect the engine oil filter for evidence of
blockage.
3. Install a new engine oil filter. Refer to the
Operation and Maintenance Manual, "Engine Oil
and Filter - Change".
4. If the fault is still apparent, refer to "Engine Oil
Cooler".
Engine Oil Cooler
1. If oil flow or coolant flow through the oil cooler
is suspected of being low, replace the oil cooler.
Refer to Disassembly and Assembly, "Engine
Oil Cooler - Remove" and Disassembly and
Assembly, "Engine Oil Cooler - Install".
2. If the fault is still apparent, refer to "Piston Cooling
Jets".
Piston Cooling Jets
1. Inspect the piston cooling jets for damage.
Replace any piston cooling jet that appears to be
cracked, broken or missing. Refer to Disassembly
and Assembly, "Piston Cooling Jets - Remove
and Install".
2. If no damage is found, refer to "Engine Oil Suction
Tube".
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Troubleshooting Section