- Confirm the Alarm or Shutdown Condition : Look at the generator control panel for the LLOP fault alarm. Note if the generator has shut down automatically.
- Check the Lube Oil Level : Inspect the lube oil reservoir or dipstick to see the oil level. Make sure it’s within the recommended range. If it’s low, add the appropriate oil as specified by the manufacturer.
- Look for Oil Leaks : Examine the generator for any visible oil leaks around the oil filter, oil lines, and crankcase. Fix any leaks you find.
- Measure the Oil Pressure : Use a mechanical oil pressure gauge to check the actual oil pressure. Compare this reading to the manufacturer’s recommended range.
- Assess the Oil Pressure Sensor : Ensure the oil pressure sensor is working properly. Disconnect it and test with a multimeter or pressure gauge. Replace it if it’s malfunctioning.
- Check the Oil Filter : A dirty or blocked oil filter can reduce oil flow and drop pressure. Replace the oil filter if needed.
- Inspect the Oil Pump : A damaged oil pump can fail to keep up the pressure. Check it for wear or damage, and replace it if necessary.
- Review Generator Operating Conditions : Make sure the generator isn’t running in extreme conditions, such as high load or temperature, which could affect oil pressure. Ensure it has proper ventilation and cooling.
- Inspect Electrical Connections : Check the wiring and connections to the oil pressure sensor and control unit for any loose or damaged wires. Secure or replace these connections as needed.
- Reset the Fault : Once the issue is resolved, reset the generator control panel to clear the fault. Run the generator and monitor the oil pressure to make sure the fault is fixed.
Preventive Measures : Perform regular maintenance, including changing oil and filters. Regularly check lube oil levels and quality. Stick to the manufacturer’s service schedule.
Following these steps will help you effectively diagnose and fix a low lube oil pressure issue in your diesel generator.