The Caterpillar 7N-1101 Aftercooler Core is the heat-exchanging element designed for SR4 generator sets that use the 3306 family engines (3306B and G3306). As the core of a jacket-water aftercooler, it serves to cool the charged air after turbocharging before it enters the engine, improving density and combustion efficiency. Cat Parts Store lists 7N-1101 specifically for SR4 configurations with 3306/G3306 power units, offering it as a replacement aftercooler core for those applications.
