Cummins 3080521 PT Fuel Injection Pump

The Cummins 3080521 is a PT (Pressure-Time) type fuel injection pump designed for Cummins K-series and QSK-series heavy-duty diesel engines. This mechanical fuel pump meters and delivers fuel to injectors based on engine speed and load signals. It serves as the primary fuel metering device for KTA38, KTA50, K38, K50, QSK38, and QSK50 engine platforms used in power generation, marine propulsion, and heavy construction equipment. The pump features a governor assembly for speed control and a fuel shutoff solenoid interface. Calibration trim codes (BD76, BF95, BB31, BG88, BC70, BD04) denote specific fuel delivery curves matched to engine application and emissions certification. The pump housing is cast iron with internal hardened steel rotating components. Remanufactured equivalent part number is 3430943. Weight is approximately 9.1 kg (20.04 lb).