3512B Oil Well Servicing Engine (ADEM III) Caterpillar


Coolant Temperature Is Too High

Usage:

3512B 2AF
Use this procedure in order to troubleshoot a high coolant temperature or use this procedure if one of the following event codes is active. Refer to Troubleshooting, "Event Code List" for the default conditions for these codes.

Table 1
Event Code 
Description  Default Conditions which Generate this Code  System Response 
E007(2) High Aftercooler Temperature Derate  The aftercooler temperature is above the trip point temperature.  The engine will be derated.
The code is logged. 
E008(3) High Aftercooler Temperature Shutdown  The aftercooler temperature is above the trip point temperature.  The engine will shut down. The code is logged. 
E017(1) High Engine Coolant Temperature Warning  The engine coolant temperature is above the trip point temperature.  The code is logged. 
E015(2) High Engine Coolant Temperature Derate  The engine coolant temperature is above the trip point temperature.  The engine will be derated.
The code is logged. 
E016(3) High Engine Coolant Temperature Shutdown  The engine coolant temperature is above the trip point temperature.  The engine will shut down. The code is logged. 

Probable Causes

  • Low coolant level

  • Radiator

  • Coolant leak

  • Faulty radiator cooling fan (if applicable)

  • Faulty pressure relief valve

  • Faulty temperature regulator

  • Faulty jacket water coolant pump

  • Excessive load on the engine

Recommended Actions

Low Coolant Level

Inspect the coolant level. If necessary, add coolant.

Radiator

Check the cooling fins on the radiator for dirt and/or for debris. Remove the dirt and/or debris.

  1. Check the cooling fins on the radiator for damage. Refer to the Systems Operation/Testing and Adjusting manual for instructions for testing and inspecting the cooling system.

  2. Check the radiator for internal blockage. Check the temperature difference between the inlet and the outlet of the radiator.

Coolant Leak

Check the cooling system for leaks.

  1. Inspect the coolant for presence of bubbles.

  2. Check the cooling system for combustion gases. Inspect the cylinder liners for cracks.

Faulty Engine Cooling Fan (if applicable)

Check for proper operation of the cooling fan.

Faulty Pressure Relief Valve

Check operation of the pressure relief valve and the radiator cap. If necessary, clean the pressure relief valve and/or the radiator cap. Check that the seating surface of the valve is clean and undamaged. If necessary, install new parts.

Faulty Temperature Regulator

Check the water temperature regulators for correct operation.

Faulty Jacket Water Coolant Pump

Inspect the impeller vanes at the jacket water pump for damage and/or for erosion. Repair impeller vanes and/or replace the impeller vanes.

Load on the system

Check that the engine is not loaded beyond design.

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