Cummins 3077760 PT Fuel Injector Assembly

The Cummins 3077760 is a PTD-type unit fuel injector designed for the Pressure-Time (PT) fuel system utilized in heavy-duty 12-cylinder K38/KTA38 and 16-cylinder K50/KTA50 diesel engines. It features wear-resistant alloy plungers and precision-machined nozzle orifices to deliver accurate fuel atomization, stable injection quantity, and precise timing control across the 750 to 1600 HP rating range. The injector body is constructed from high-strength stainless steel to withstand cylinder head temperatures up to 320°C and standard operating fuel pressures of 100 to 150 PSI. This component serves as a direct replacement for Cummins OEM part numbers 3053124, 3076132, and 3076703, ensuring compatibility with CCEC and DCEC engine platforms including QSK19, QSK38, and QSK50 series. Applications span mining haul trucks, large generator sets, coastal marine propulsion, oilfield power units, and heavy construction machinery.