VALVE GP-RELIEF 6E6139 - Caterpillar

Table 1
Event Code    
Description    Conditions which Activate the Code    System Response    
E020(1) High Engine Oil Temperature Warning     The crank terminate relay is set and the engine has been running for at least 30 seconds. The engine oil temperature has exceeded the trip point and the delay time has expired. No other codes for the engine oil temperature are active.     The alarm output is activated. The code is logged.    
E019(3) High Engine Oil Temperature Shutdown     The fuel is shut off. The shutdown output is activated. The code is logged. Probable Causes
Contaminated engine oil
Problem with the engine oil temperature regulators
Problem with the engine oil temperature sensor
Problem with the circuit for the aftercooler and engine oil cooler
Insufficient flow of coolant or engine oil through the engine oil cooler
Mechanical frictionRecommended Actions
Contaminated Engine Oil
Engine oil that is contaminated with another liquid can cause low engine oil temperature. High engine oil level can be an indication of contamination. Obtain an analysis of the engine oil. Determine the reason for contamination of the engine oil and make the necessary repairs. Change the engine oil and the engine oil filter. For the correct engine oil to use, refer to Operation and Maintenance Manual, "Engine Oil".Check the Engine Oil Temperature Regulators
Make sure that the engine oil temperature regulators open according to the correct values. Refer to Specifications, "Engine Oil Temperature Regulators".Check the Engine Oil Temperature Sensor
Check the reading of the engine oil temperature on Cat ET. Compare the reading to a reading from a separate device. The temperature should rise steadily as the engine is warmed.If the reading on Cat ET for the engine oil temperature is not reasonable, replace the engine oil temperature sensor.Check the Cooling System
Make sure that the heat exchanger for the engine oil cooler and the aftercooler is operating properly. The heat exchanger must be properly sized for the ambient conditions. Check the plumbing for obstructions.Check the Flow through the Engine Oil Cooler
Run the engine at normal operating temperature. Determine the pressure differential for the coolant and for the engine oil between the inlet and the outlet of the engine oil cooler. For comparative data, refer to the Technical Marketing Information for the engine.If the pressure differential between the inlet and the outlet of the engine oil cooler exceeds the data that is published for the engine, there is an insufficient flow of coolant or of engine oil through the engine oil cooler. Clean the engine oil cooler.Mechanical Friction
Friction of gears and/or of bearings will raise the engine oil temperature. Measure the engine oil temperature at various locations in order to locate the hot spot. Obtain an analysis of the engine oil. Make the necessary repairs.