Coolant Temperature Is Too High
The probable root causes are listed below:
- Low coolant level
- Coolant leak
- Faulty pressure relief valve
- Cooling system
- Faulty temperature gauge
- Faulty jacket water coolant pump
- Too much load on the system
Perform the following checks:
- Inspect the coolant level. If necessary, add coolant.
- Check the cooling system for leaks.
- Inspect the coolant for presence of bubbles.
- Check the cooling system for combustion gases. Inspect the cylinder liners for cracks. Refer to System Operation, "Cooling System".
- Check the water temperature regulators for correct operation.
- Check the temperature gauge for correct operation. If necessary, install new parts.
- Inspect the impeller vanes at the jacket water pump for damage and/or erosion. Repair impeller vanes and/or replace the impeller vanes.
- Check that the engine is not loaded beyond design.
Caterpillar Information System:
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