Cummins original Diesel Fuel Injector Replacement for OEM 2881088, for heavy duty diesel engine application, 2882079, 4964170, 4955524 for K19 QSK19 QSK50 QSK60 Excavator original new injector

For maintenance teams supporting Cummins QSK19 power platforms, fuel injector 4955524 offers a clearly identified reference for diesel fuel-system sourcing. Marketed primarily for QSK19 and QSK19 Tier 3 engines, this injector assembly supports fuel-system repair, injector replacement and overhaul work on the 19L heavy-duty engine family. Its core function is to meter and atomize diesel fuel into the combustion chamber, making correct selection essential to maintaining engine performance.

Correct injector performance helps support stable combustion, high torque, fuel efficiency, lower smoke, smooth idle and reliable operation in demanding service. Application environments associated with the QSK19 platform include marine engines, generator sets, mining equipment, rail engines, oilfield units and industrial power systems. For oil and gas use, Cummins lists the QSK19 at 525–800 hp (391–597 kW) and 1,775–2,275 lb-ft (2,407–3,084 N·m) of torque; these figures describe the engine platform, not the injector.

Supplier-listed cross references include 4964170, 4955524NX, 4955524PX, 4955524KX, F00BL0J019, F00BL0J020, 0986435612 and 0986435614. They assist quotation and catalog matching but do not establish universal interchangeability. Before ordering, buyers should confirm the engine model, ESN, CPL, old injector number, Bosch or Cummins number, injector photograph, connector type, injector code and fuel-system version. K19/KTA19 and wider QSK-series references require additional verification and must not be treated as confirmed fitment without matching the old injector.