BOLT 1L9080 - Caterpillar

The interval for the maintenance of the aftercooler depends on the operating environment of the vessel and on the operating time. The sea water that is circulated through the aftercooler and the amount of operating time of the vessel affects the following items:
Cleanliness of the tubes of the aftercooler
Effectiveness of the aftercoolerOperating in water that contains silt, sediment, salt, algae, and so on, will adversely affect the aftercooler system. In addition, intermittent use of the vessel will adversely affect the aftercooler.The following items indicate that the aftercooler may require cleaning:
Increased coolant temperature
Engine overheating
Excessive pressure drop between the water inlet and the water outletAn operator that is familiar with the normal operating temperature of the coolant can determine when the coolant temperature is out of the normal range. Inspection and maintenance of the aftercooler are required if the engine is overheating.Your Cat dealer has the equipment and the trained personnel that are needed in order to measure the pressure drop across the aftercooler. Refer to the Operation and Maintenance Manual, "Aftercooler Core - Clean/Test". For more information on servicing the aftercooler, consult your Cat dealer.