Centinel System – Repair Manual – Lubricating Oil Pressure Low

Lubricating oil pressure sensor or circuit is malfunctioning (electronic controlled fuel system)

Check the lubricating oil pressure sensor and circuit. Refer to Procedures 019-155 or
019-066 in Section 19 in the Troubleshooting and Repair Manual, Power Generation Control Systems QSX15, QSK23, QSK45, QSK60, QSK78, and QST30 Series Engines, Bulletin 4021419, or
Procedure 019-155 in Section 19 in Troubleshooting and Repair Manual, Electronic Control System, Signature™, ISX and QSX Engines, Bulletin 3666259, or
Procedure 019-066 in Section 19 in Troubleshooting and Repair Manual, CM870 Electronic Control System, Signature™ and ISX Engines, Bulletin 4021334.

Lubricating oil does not meet specifications for operating conditions

Change the oil and filters. Refer to Service Bulletin 3810340 or
Procedure 018-003 in Section V in the Operation and Maintenance Manual, Signature™ and ISX Engines, Bulletin 3666251 or
Procedure 018-003 in Section V in the Operation and Maintenance Manual, Industrial and Power Generation, QSX15 Engines, Bulletin 3666423. Use the oil type recommended in Section V of the operation and maintenance manual.

Lubricating oil level is above or below specification

Check the oil level. Add or drain oil, if necessary. Refer to Procedure 007-037 in Section 7.

Engine angularity during operation exceeds specification

Refer to the Engine Specification data sheet.

Lubricating oil filter is plugged

Measure the differential pressure drop across the lubricating oil filter. Refer to Procedure 007-013 in Section 7 or the Lubricating Oil Pressure Low symptom tree. If lubricating oil filter is plugged, refer to the Lubricating Oil Filter Plugged symptom tree.

Lubricating oil is contaminated with coolant or fuel

Refer to the Lubricating Oil Contaminated symptom tree.

Lubricating oil pump is malfunctioning or the o-rings are damaged

Inspect the lubricating oil pump and o-rings. Refer to Procedure 007-031 in Section 7.

Lubricating oil high-pressure relief valve or lubricating oil pump is malfunctioning

Remove and inspect the high-pressure relief valve or lubricating oil pump. Refer to Procedures 007-021 and
007-031 in Section 7.

Lubricating oil temperature is above specification

Refer to the Lubricating Oil Temperature Above Specification symptom tree.

Lubricating oil suction or transfer tube is loose or broken, or the gasket or o-rings are leaking

Remove and inspect the oil pan or suction tube. Refer to Procedure 007-025 in Section 7.

Piston cooling nozzles are damaged or are not installed correctly

Check the piston cooling nozzles for damage and correct installation. Refer to Procedure 001-046 in Section 1.

Lubricating oil cooler is plugged

Check the oil cooler. Refer to Procedure 007-003 in Section 7.

Internal engine damage

Analyze the oil and inspect the filters, pistons, camshaft, and other parts to locate an area of probable damage.