Cummins original Replacement for OEM 3766446 Diesel Common Rail Fuel Injector Auto Engine Parts for QSK45 QSK60 Diesel Engine Excavator Cross Ref 4088431 4902827 3633716 original new injector

Engineered for the demanding duty cycles of large-displacement power units, the Cummins 3766446 fuel injector delivers reliable performance across the QSK23 diesel engine platform. This 23-liter inline 6-cylinder, 4-cycle engine features a 170 mm bore and 170 mm stroke, turbocharged and charge-air-cooled architecture, supporting well-servicing ratings of 760–950 hp / 567–708 kW and generator outputs from 545–725 kW prime power to 600–800 kW standby power. The injector is also referenced for QSX23, QSK45, and QSK60 applications, making it a versatile choice for engine rebuild shops and diesel parts distributors.

Built for heavy-duty industrial service, this injector provides precise fuel metering, high-pressure injection performance, and stable atomization for improved combustion stability. Durable construction and effective leakage control help protect the engine while supporting fast, dependable replacement for industrial fleets. It is a proven solution for oil and gas, mining, construction, and power generation markets where uptime is critical. Cross reference numbers include 4088426, 4088427, 4088428, 4326639, 4326780, 4326781, 4326784, 4928346, 4928349, 4087887, and 4010163.

Injector service life depends heavily on fuel cleanliness. Use clean diesel, replace filters on schedule, and remove water from the fuel system. During installation, confirm the injector by ESN and original marking, replace seals, apply correct Cummins torque values, prime the system, and test for leaks. Preventive inspection outperforms waiting for complete failure.