Cummins 3042713 Injector Cup

The Cummins 3042713 injector cup serves as a critical sealing interface between the fuel injector and the cylinder head in heavy-duty diesel engines. Manufactured to OEM specifications, this component ensures proper fuel delivery and prevents combustion gas leakage into the cooling system. It is constructed from a steel and copper alloy composite to withstand high thermal and mechanical stress cycles inherent in PT fuel systems. This part is a direct replacement for Cummins part number 3042713. It is compatible with Cummins K19, KT19, K38, K50, QSK38, and NT855 engine series. Applications span heavy-duty trucks, construction machinery, mining equipment, and power generation units utilizing these engine platforms. Installation requires specialized tooling to ensure correct seating depth and seal integrity.