SPACER 3P5627 - Caterpillar

Probable Causes
Aftercooler
High coolant temperature
High ambient air temperature
AltitudeRecommended Actions
High Coolant Temperature
A high coolant temperature will reduce the cooling capacity of the aftercooler. Check the cooling fan for proper operation. Inspect the aftercooler for blockage or for damaged components.Verify that the cooling system is filled to the proper level. If the coolant level is too low, air will get into the cooling system.Check for air in the cooling system. Air can enter the cooling system in different ways. The most common causes of air in the cooling system are the incorrect filling of the cooling system and combustion gas leakage into the cooling system. Combustion gas can get into the system through inside cracks, a damaged cylinder head, or a damaged cylinder head gasket.High Ambient Air Temperature
Determine if the ambient air temperature is within the design specifications for the cooling system. When ambient temperatures are too high for the rating of the cooling system, there is not enough of a temperature difference between the ambient air and coolant temperatures.Altitude
Consider high altitude operation. The cooling capability of the cooling system is reduced at higher altitudes. A pressurized cooling system that is large enough to keep the coolant from boiling must be used. Make sure that the settings for the engine are correct for the altitude.