3512B Petroleum Engines Caterpillar

The aftercooler is located at the center of the vee. The aftercooler has a core assembly that is charged with coolant (assemblies). Coolant from the water pump flows through a pipe into the aftercooler. Coolant then flows through the core assembly (assemblies). Coolant flows back out the aftercooler through a different pipe.

Inlet air from the compressor side of the turbochargers flows into the aftercooler through pipes. The air then passes through the fins of the core assembly (assemblies) which lowers the temperature. The cooler air flows out of the bottom of the aftercooler and into the air chamber. The air flows through the elbows to the inlet ports (passages) in the cylinder heads.

Air Shutoff (If Equipped)

The air shutoff uses a plate that rotates on a shaft in order to shut off the inlet air to the aftercooler. The engine stops because of the restricted air supply to the combustion chamber. The air shutoff only actuates when the Emergency Stop Push Button or the Overspeed Shutdown are actuated.

Note: If the engine is equipped with Air Shutoff then the "Configuration Parameter" for "Air Shutoff" must be programmed "ON".