Cummins 3018813 Injector Cup

The Cummins 3018813 injector cup is a critical component of the PT (Pressure-Time) fuel injection system, designed to seat the injector in the cylinder head and provide a high-pressure seal for the combustion chamber. Manufactured to OEM specifications from hardened alloy steel, it ensures precise injector alignment and prevents combustion gas leakage into the cooling system. This part serves as a direct replacement for Cummins OEM part number 3018813 and cross-references aftermarket number BLD-106518-0111. It is engineered for heavy-duty applications including on-highway trucks, buses, and industrial power units equipped with NTA855 or V28 series engines. Installation requires specialized tooling to ensure proper seating depth and seal integrity.