BARREL AS 1908368 - Caterpillar

Replacing of Components
Replace the following components during a top end overhaul.
Cylinder heads and gaskets
Oil temperature regulators
Water temperature regulatorsRebuilding of Components
Rebuild the following components during a top end overhaul:
Carburetor
Exhaust bypass
Gas regulator
Prelube pump
Starting motor
Turbochargers
Water pumpsNote: Periodic inspection of the turbocharger is recommended for determining when the turbocharger will require an overhaul. In a few applications, the turbocharger may require rebuilding prior to the top end overhaul. An example is an application with loads that vary frequently. In these cases, rebuilding the turbocharger normally occurs separately from rebuilding the cylinder heads. Some applications can operate longer before the turbocharger requires rebuilding. Only experience can determine the actual need.Inspecting of Components
Clean the aftercooler core and the oil cooler core. Pressure test the components. Replace the components.Note: It is difficult to clean the aftercooler core when proper maintenance is not performed . The tank that is opposite of the inlet port and the outlet port can not be removed for cleaning.Note: This procedure may be used for cleaning both the aftercooler core and the oil cooler core.
Remove the core. For the procedure, see the Service Manual, "Disassembly and Assembly" module. Refer to the "Reference Materials" topic for more information.
Turn the 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. Hydrosolv liquid cleaners are available from your Caterpillar dealer.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 Caterpillar dealer for more information.
Steam clean the core in order to remove any residue. Flush the fins of the 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. Note: The test pressure for the oil cooler is 790 kPa (115 psi). The maximum differential pressure of water for the aftercooler is 44 kPa (6 psi). The maximum differential pressure of air for the aftercooler is 5.1 kPa (0.74 psi).
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 core. For the procedure, see the Service Manual, "Disassembly and Assembly" module. Refer to the "Reference Materials" topic for more information. For more information on cleaning the cores, consult your Caterpillar dealer.Coupling
For tandem engine arrangements, inspect the coupling for the engines according to the information that is provided by