Cummins original For QSK19 QSK19-5 QSK38 QSK50 Engine Common Rail Fuel Injector Y431K06139 Mining Excavator Replacement for OEM, Cross Reference 4358048 original new injector

For B2B buyers supporting Cummins QSK-series engines, Y431K06139 is a heavy-duty diesel common rail fuel injector reference with a broad, clearly documented cross-reference set. It is commonly listed with Bosch F00BJ00042, Y431K05857, and Cummins replacement numbers 5375441, 4380190 and 4358048. Public supplier listings associate this injector group with QSK19, QSK38 and QSK50 applications, including specified CM2350 variants, giving purchasing and maintenance teams a practical basis for source comparison and parts identification.

The injector controls diesel fuel delivery into the combustion chamber, so its operation directly influences starting performance, idle quality, smoke level, exhaust temperature, fuel consumption, cylinder balance and power output. This makes injector reliability especially important in high-load, long-hour QSK service. Relevant operating environments include high vibration, mining dust, marine humidity, generator duty cycles, rail duty cycles and oilfield conditions. The product is positioned for engine service and replacement planning rather than universal, unverified fitment.

Applications extend across QSK-powered mining, generator power, marine, rail, oil and gas, construction, industrial power, agriculture and forestry equipment. Typical machinery includes haul trucks, large excavators, drilling rigs, crushers, generator sets, marine vessels, compressor drives, pump units, cranes and stationary diesel power packs. It is relevant to diesel repair shops, engine rebuilders and fleet or equipment service teams. Before shipment, final fitment must be confirmed by engine serial number, original injector number, CPL, ECM calibration and equipment model.