SEAL AS 9X7269 - Caterpillar

The interval for the cleaning of the aftercooler core 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 for the aftercooler
Effectiveness of the aftercoolerOperating in water that contains the following will adversely affect the aftercooler: silt, sediment, salt and algae.Note: Adjust the frequency of cleaning according to the effects of the operating environment.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Cat Dealer Service Tool Catalog" or refer to Special Publication, PECJ0003, "Cat Shop Supplies and Tools Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Drain the aftercooler.
Remove the aftercooler. Refer to the Disassembly and Assembly Manual, "Aftercooler - Remove and Install" article for the aftercooler removal procedure.
Turn the aftercooler core upside-down in order to remove debris.
Do not use a high concentration of caustic cleaner to clean the core. A high concentration of caustic cleaner can attack the internal metals of the core and cause leakage. Only use the recommended concentration of cleaner.
Back flush the core with cleaner. Caterpillar recommends the use of Hydrosolv liquid cleaner. Table 1 lists Hydrosolv liquid cleaners that are available from your Cat dealer.
Table 1
Hydrosolv Liquid Cleaners(1)
Part Number Description Size
1U-5490 Hydrosolv 4165 19 L (5 US gallon)
174-6854 Hydrosolv 100 19 L (5 US gallon)
(1) Use a two to five percent concentration of the cleaner at temperatures up to 93°C (200°F). Refer to Application Guide, NEHS0526 or consult your Cat dealer for more information.
Steam clean the core in order to remove any residue. Flush the tubes of the heat exchanger core. Remove any other trapped debris.
Wash the core with hot, soapy water. Rinse the core thoroughly with clean water.
Personal injury can result from air pressure.Personal injury can result without following proper procedure. When using pressure air, wear a protective face shield and protective clothing.Maximum air pressure at the nozzle must be less than 205 kPa (30 psi) for cleaning purposes.
Dry the core with compressed air. Direct the air in the reverse direction of the normal flow.
Inspect the core in order to ensure cleanliness. Pressure test the core. Many shops that service radiators are equipped to perform pressure tests. If necessary, repair the core.
Install the aftercooler. Refer to the Disassembly and Assembly Manual, "Aftercooler - Remove and Install" article for the installation procedure. For more information on cleaning the core, consult your Cat dealer.