3126B Industrial Engines E039 Low Engine Oil Pressure Derate Caterpillar


E039 Low Engine Oil Pressure Derate
`
EID E039

Conditions Which Generate This Code:

The Electronic Control Module (ECM) detects an engine oil pressure that falls below the trip point. Information on default settings and ranges for this event can be found in Troubleshooting, "Event Codes".

System Response:

The ECM will log the code.

Possible Performance Effect:

  • The engine power is derated.

Troubleshooting:

There may be a problem with the engine.

Test Step 1. CHECK THE ENGINE'S LUBRIAVSION SYSTEM

  1. Check the engine oil level. If the oil level is below the oil pump's supply tube, the oil pump will not have the ability to supply enough lubrication to the engine components. If the engine oil level is low, add engine oil in order to obtain the correct engine oil level.

  2. Check the following problems that may occur to the engine oil pump:

    1. Air leakage in the supply side of the oil pump will also cause cavitation and loss of oil pressure. Check the supply side of the oil pump and make necessary repairs.

    2. Oil pump gears that have too much wear will cause a reduction in oil pressure. Repair the engine oil pump.

    3. If the engine is equipped with a scavenge pump, the scavenge pump may not be supplying oil to the main engine oil pump.

  3. The inlet screen of the oil suction tube for the engine oil pump can have a restriction. This restriction will cause cavitation and a loss of engine oil pressure. Check the inlet screen on the oil pickup tube and remove any material that may be restricting engine oil flow. Low engine oil pressure may also be the result of the oil pickup tube that is drawing in air. Check the joints of the oil pickup tube for cracks or a damaged O-ring seal.

  4. If the engine oil bypass valves are held in the open position, a reduction in the oil pressure can be the result. This may be due to debris in the engine oil. If the engine oil bypass valves are stuck in the open position, remove each engine oil bypass valve and clean each bypass valve in order to correct this problem. You must also clean each bypass valve bore.

  5. Engine oil that is contaminated with fuel or coolant will cause low engine oil pressure. High engine oil level in the crankcase can be an indication of contamination.

  6. Excessive clearance at engine bearings will cause low engine oil pressure. Check the engine components for excessive bearing clearance.

  7. An oil line that is open, broken, or disconnected will cause low engine oil pressure.

Expected Result:

An inspection of the engine's lubrication system indicated a problem.

Results:

  • OK - There is a problem in the engine's lubrication system.

    Repair: Repair the problem. Ensure that the repair eliminates the problem.

    STOP

Information System:

C32 Marine and Marine Generator Set Engines Cooling System - Check - Overheating
3508C, 3512C and 3516C Marine Engines Crankshaft Front Seal and Wear Sleeve - Install
3508C, 3512C and 3516C Marine Engines Crankshaft Rear Seal and Wear Sleeve - Install
3126B Industrial Engines E025 High Inlet Air Temperature Derate
3406E, C12, C15 and C18 Marine Engines E017 High Engine Coolant Temperature Warning
3406E, C12, C15 and C18 Marine Engines E015 High Engine Coolant Temperature Derate
2005/01/17 Correction to Engine Speed/Timing Sensor-Calibrate {1912}
3500B Marine Propulsion Engines Heat Exchanger - Inspect
C11 and C13 Engines for Caterpillar Built Machines Electronic Unit Injector - Install
345C Excavator Machine System Specifications Boom Cylinder
12M and 140 Motor Grader Roading the Machine
3508C, 3512C and 3516C Marine Engines Engine Oil Cooler - Assemble
C27 and C32 Generator Set Engines E057 Low Engine Coolant Level Derate
C27 and C32 Generator Set Engines E059 Low Engine Coolant Level Warning
C0.5, C0.7, C1.1/3011C, C1.5/3013C, C1.6 and C2.2/3024C/3024CT Industrial Engines and Engines for Caterpillar Built Machines Cooling System - Test
G3508B, G3512B, G3512B, G3516B and G3520B Petroleum Engines Crankshaft Rear Seal and Wear Sleeve - Remove
C32 Marine Engines Fuel Level Sensor Circuit - Test
C0.5, C0.7, C1.1/3011C, C1.5/3013C, C1.6 and C2.2/3024C/3024CT Industrial Engines and Engines for Caterpillar Built Machines Piston Ring Groove - Inspect
C32 Marine Engine Sensors and Electrical Components
C9 Urban Transit Bus Engine Fuel Filter Base - Remove and Install
C9 Urban Transit Bus Engine Unit Injector - Remove
C9 Urban Transit Bus Engine Unit Injector - Install
C27 and C32 Engines Electrical System
3500B High Displacement Generator Set Engines Refill Capacities and Recommendations