Cummins original Common Rail Diesel Fuel Injector for Diesel Engine, QSK23 QSK45 QSK60, Cross Reference 4087892, Replacement for 4088426, Fuel Injector 4326779, 4088416 original new injector

Built around OE reference 4326779, this Cummins diesel fuel injector assembly is positioned primarily for QSK60 applications and is also commonly listed for QSK45 heavy-duty engines. Related supplier references include 4326779NX, 4326779PX, 4326779RX, 4010158, 4087892 and 4088426, together with their NX, PX and RX suffix versions; 709804AT appears in one listing and requires verification. These references support sourcing and interchange checks, but they are not a substitute for serial-number-based fitment confirmation.

As the final precision metering component in the diesel fuel system, the injector delivers a controlled fuel quantity into the combustion chamber at the required timing, pressure and spray pattern. The QSK60 platform is a 60.2 L, V16, four-cycle, turbocharged diesel engine, with official generator data listing direct injection, a cast-iron block, 158.8 mm bore and 190 mm stroke. On selected QSK60 versions, Cummins High Pressure Modular Common Rail technology electronically controls injection pressure and timing; an integrated accumulator in each injector helps reduce pressure pulsation and improve stability.

Typical equipment coverage includes mining trucks and equipment, marine propulsion and auxiliary power, generator sets, data-center backup generators, oilfield power units and stationary industrial systems, subject to confirmation. Before quotation or shipment, buyers should provide the engine model, ESN, CPL number, old injector number, injector and nameplate photos, fuel system type, application, quantity and required product condition. Because injector versions can vary by build configuration, emissions level and rating, fitment should never be confirmed by engine model alone.