0388250 JOHNSON COVER ASSY.

Cooler Cores
The following cooler cores are cooled by the hydraulic fan that is located in the radiator guard at the front of the track-type tractor.Aftercooler core - The aftercooler core cools the inlet manifold air to the engine.Radiator core - The AMOCS radiator cores cool the engine coolant.A/C condenser core - The air conditioning condenser core cools the refrigerant in the air conditioning system.Aftercooler Core
Illustration 1 g01424403
Rear view of dual aftercooler
Radiator Core
Illustration 2 g01424408You can use compressed air, high-pressure water, or steam to remove dust and other debris from the radiator core. However, the use of compressed air is preferred.See Special Publication, SEBD0518, "Know Your Cooling System" for the complete procedure for cleaning the radiator core.A/C Condenser Core
Illustration 3 g01224464The arrangement for the air conditioner condenser is located under the hood.Remote A/C Condenser Core
In some machine arrangements, the a/c condenser core is remotely located. A remote mounted a/c condenser core is cooled by fans with electric drive.
Illustration 4 g01424471An optional arrangement for the air conditioner condenser is located on the top of the machine.Inspect
Note: Adjust the frequency of inspection according to the effects of the operating environment.
Illustration 5 g01424503Turn off the engine.Open both of engine access doors.Inspect the cooling system for the following conditions: coolant leaks, oil leaks, damaged fins and tubes. Inspect the following parts of the cooling systems: air lines, connections and clamps for damage .Make repairs for damage, if necessary.Note: If parts of the aftercooler system may appear to be damaged or have been repaired, a leak test is highly recommended. Refer to Special Instruction, SEHS8622, "Using the FT1984 Air-to-Air Aftercooler Leak Test Group". The FT-1984 Aftercooler Testing Group can be used for aftercoolers that have hoses with an inside diameter of 102 mm (4.00 inch) or 114 mm (4.50 inch).For more detailed information on testing and inspection, see Special Publication, SEBD0518, "Know Your Track-Type Tractor Cooling System".Replacing the Aftercooler Core
Reference: See Disassembly and Assembly, RENR8223, "Aftercooler - Remove and Install" for more information on removing the aftercooler core.Clean
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.
Radiator cores, aftercooler cores, and a/c condenser cores needed to be cleaned regularly. Adjust the frequency of cleaning according to the effects of the operating environment.Tilt the aftercooler cores backward toward the engine in order to clean the cores properly.Blow out the cores with compressed air. Move the air nozzle in a systematic pattern so that the air flow covers the whole core that includes areas in the corner. Clean the middle space between the aftercooler core and the a/c condenser core.Use a bent copper tube that is approximately 1/4 -3/8 inch diameter as an extension to the air nozzle. This extension will facilitate cleaning of the middle spaces. Do not use steam or high-pressure water for cleaning frequently. If steam or high-pressure water is required to dislodge any debris that is held deep in the cores, make sure that the cleaning is thorough. This action may require partial removal or total removal of the air conditioner condenser for better access. Incomplete cleaning with water may cause remaining debris to harden in place. Use lights and wire probes in order to ensure that the cleaning is thorough and complete. If the debris has hardened in the center of the cores, these cores may need to be removed for thorough cleaning.If you use a degreaser and steam for removal of oil and grease, wash the core with detergent and hot water. Thoroughly rinse the core with clean water. Dry the cores completely before operating the machine in the work mode.Dry
If steam or water is used to clean the cores, make sure that the cores are dry before the track-type tractor is put back to work.Use compressed air to blow dry the wet cores, the engine, engine access doors, and the hood.Close both engine access doors.If the machine is in a clean environment, start the engine and allow the fan to run until the cooling system has dried. Allow the machine to sit overnight before operating the machine in the work mode.