Cummins original 579261 Diesel Fuel Unit Injector Engine Component Replacement for DC12.14 QSKX15 QSX15 ISX15 X15 Fits R420 Truck Excavator Cross Ref 1499257 570016 4954648 4903455

Engineered for the demanding duty cycles of the Cummins QSK15 and QSX15 engine families, the 579261 diesel fuel injector delivers precision fuel metering and stable atomization across the full 15L heavy-duty power range. Built with heavy-duty construction and high temperature resistance, this HPI fuel injection component supports engine power recovery, fuel economy, and lower misfire risk, making it a dependable replacement choice for professional repair shops and industrial operators worldwide.

This injector carries the primary OE number 579261 and is cross-referenced to 1764365, 4954646, 570016, 579251, 4954648, 1764364, 1499257, 4903451, and 579263, providing straightforward cross-number searchability for aftermarket sourcing. Its reliable sealing and tested flow performance make it suitable for diesel generator sets, mining trucks, excavators, wheel loaders, motor graders, rock drills, drilling rigs, oilfield power units, marine auxiliary engines, rail equipment, and heavy trucks operating under continuous load.

To maximize service life, use clean diesel fuel, replace fuel filters on time, drain the water separator, and inspect injector wiring and connectors regularly. Correct installation helps address symptoms such as hard starting, rough idle, black smoke, power loss, high fuel consumption, and misfire under load. Supplied in dry sealed export-friendly packaging, this injector is ready for reliable global aftermarket distribution.