Cummins original Replacement Fuel Injector 4010025 4928348 4087886 4928349 for Cummins QSK19 K19 KTA19 QSK23 Excavator, for heavy duty diesel engine application original new injector

The 4010025 fuel injector is an industrial-grade diesel injector and injector nozzle assembly for heavy-duty Cummins QSK engine applications, with this page focused on the QSK23. Its product features include a strong injector body, precision fuel metering, high-pressure compatibility, fine atomization, high-temperature resistance and sealing reliability. Export-ready packaging, optional remanufactured supply, optional test support and cross-reference matching support are also available for professional sourcing and engine-repair requirements.

Within the QSK23 High Pressure Injection (HPI) system, the injector supports fuel metering, high-pressure injection and controlled atomization in the combustion chamber. Fuel delivery is managed according to engine speed, load, air supply, boost pressure and electronic control strategy. Correct injector performance helps support smooth starting, steady idling, rated power output, reduced smoke and fuel economy, making accurate injector selection important for generator, mining, construction, oilfield and other heavy-duty equipment.

For identification, 4010025 is commonly cross-listed with 4001813, 4087893, 4088427 and 4326780; 4087886 may appear as a reman or related number, while 4010025NX, 4010025PX and 4010025RX are reman suffix forms found in supplier databases. These references are not a blind-fit guarantee. Because catalogue coverage overlaps QSK19, QSK23, QSK45 and QSK60, compatibility must be confirmed before ordering using the engine serial number, CPL, old injector number, ECM/fuel-system type, equipment model and injector photos.