Cummins N14 STC, Celect, Celect Plus – Service Manual Lubricating Oil Pressure Low

Electronic fault codes active or high counts of inactive fault codes

Refer to Section TF in the CELECT Plus™ Systems Troubleshooting and Repair Manual, Bulletin 3666130, or Section TF in the CELECT™ Systems Troubleshooting and Repair Manual, Bulletin 3666084.

Lubricating oil level is above or below specification

Check the oil level. Add or drain oil if necessary. Refer to Procedure 007-009 and Procedure 007-037 in Section 7. Check the dipstick calibration.

Lubricating oil leak (external)

Inspect the engine for external oil leaks. Tighten the capscrews, pipe plugs, and fittings. Replace gaskets, if necessary. Refer to Section V and the OEM service manual.

Engine angularity during operation exceeds specification

Refer to the engine specification data sheet.

Lubricating oil pressure switch, gauge, or sensor is malfunctioning or is not in the correct location.

Check the oil pressure switch, gauge, or sensor for correct operation and location. Refer to Procedure 007-028 in Section 7.

Lubricating oil pressure sensor or circuit is malfunctioning

Check the oil pressure switch or circuit. Refer to the CELECT™ System Troubleshooting and Repair Manual, Bulletin 3666084.

Lubricating oil does not meet specifications

Use Cummins Inc. recommended lubricating oil type. Refer to Cummins® Engine Oil and Oil Analysis Recommendations, Bulletin 3810340.

Lubricating oil is contaminated with coolant or fuel

Refer to Lubricating Oil Contaminated troubleshooting symptom tree in Section TS.

Lubricating oil filter is plugged

Change the oil and filter. Refer to Procedure 007-037 and Procedure 007-013 in Section 7.

Sensor plugged or damaged

Check the viscosity sensor. Clean or replace if necessary. Refer to the OEM service manual.

Lubricating oil pump signal tube is plugged or damaged

Clean or replace the signal tube. Refer to Procedure 007-034 in Section 7.

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 is malfunctioning

Remove and inspect the high?pressure relief valve or lubricating pump pressure regulator. Refer to Procedure 007-021 in Section 7.

Main oil pressure regulator is malfunctioning

Check the main oil pressure regulator assembly. Refer to Procedure 007-029 in Section 7.

Lubricating oil temperature is above specification

Refer to Lubricating Oil Temperature Above Specification troubleshooting symptom tree in Section TS.

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 to locate an area of probable damage. Refer to Procedure 007-083 in Section 7.