Cummins 4914453 PT Fuel Injector Assembly

The Cummins 4914453 is a PT (Pressure-Time) type diesel fuel injector designed for the NTA855, NT855, and N14 engine families. It operates via mechanical hydraulic actuation from the PT fuel pump, delivering precise fuel metering at high pressure. Key technical parameters include an injection pressure range of 70 to 138 MPa and a fuel delivery rate of 200 to 276 mm3 per stroke. The injector body is manufactured from high-speed steel to withstand abrasive wear and high-cycle fatigue in heavy-duty cycles. The nozzle configuration is a pencil-type multi-hole design optimized for direct injection combustion chambers. This assembly serves as a direct replacement for Cummins OEM part numbers 4914537, 3071497, 3054255, 3054071, 3054218, and 3054228. It is widely applied in construction machinery, heavy-duty trucks, marine propulsion, and generator sets powered by the NTA855 series engines. Production sources include Chongqing Cummins Engine Company (CCEC) and licensed joint ventures.