PIN AS 8G4027 - Caterpillar

Inspect
Inspect the aftercooler for these items: damaged fins, corrosion, dirt, grease, insects, leaves, oil and other debris. Clean the aftercooler, if necessary.Inspect these items for good condition: welds, mounting brackets, oil lines, water lines, connections, clamps and seals. Make repairs, if necessary.Inspect the fins for damage. Bent fins may be opened with a “comb”.Clean
Note: Adjust the frequency of cleaning according to the effects of the operating environment. Clean and test the aftercooler every 4000 service hours unless the inspection indicates the need for more frequent cleaning.Remove the core. Refer to the Disassembly and Assembly Manual, "Oil Cooler- Remove" for the procedure.
Turn the aftercooler core on one side in order to remove debris. Remove the debris that is accessible.
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 2 percent to a 5 percent concentration of the cleaner at temperatures up to 93°C (200°F). Consult your Cat dealer for more information.
Steam clean the core in order to remove any residue. Flush the fins of the aftercooler core. Remove any other trapped debris from the inside and from the outside of the core. Note: Do not use high pressure when the fins are cleaned. High pressure can damage the fins.
Wash the core with hot, soapy water.
Flush the core thoroughly in order to remove residue and remaining debris. Flush the core with clean, fresh water until the water that is exiting the core is clear and free of debris.
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.The maximum air pressure for cleaning purposes must be reduced to 205 kPa (30 psi) when the air nozzle is deadheaded.
Dry the core with compressed air. Direct the air in the reverse direction of the normal flow.