Cummins original Replacement Fuel Injector 4326781 for QSK23 QSK60 Engine, Common Rail Diesel Injector, Cross Reference 4928346, Compatible with Excavator, 4088416, 4326780 original new injector

For high-horsepower diesel sourcing, Cummins fuel injector 4326781 is a heavy-duty injector assembly listed for QSK23, QSK45 and QSK60 engine applications. Related references include 4326781NX, 4326781PX, 4088428, 4088428PX, 4088427, 4001813, 4087893, 4087894, 4002145, 4326780 and 705513AT. These references support parts identification, but final compatibility must be confirmed for the specific engine rather than assumed from a cross number alone.

On QSK60 applications, Cummins identifies a High Pressure Modular Common Rail system that electronically controls the fuel pump and injectors for precise injection pressure and timing. The injector delivers a controlled quantity of diesel into the combustion chamber at the correct timing, pressure and spray pattern. Cummins also states that each injector includes an integrated accumulator to reduce pressure pulsation and improve fuel-system stability. This makes accurate injector selection important to the QSK60 platform, which Cummins rates at 2000–2700 hp for marine and mining applications.

Potential uses include QSK-powered mining trucks, marine main engines and auxiliary generators, generator sets, data-center backup power, oilfield equipment, rail engines and stationary industrial power units, subject to verification. Before ordering, buyers should provide the engine model, ESN, CPL, old injector number and photos, nameplate photo, fuel system type, application, quantity and required condition. Incorrect matching may cause hard starting, smoke, low rail pressure, cylinder imbalance, misfire, excessive fuel consumption and possible engine damage.