Cummins original 4384260 Diesel Fuel Injector for ISX15 QSX15 Engines Peterbilt Kenworth Trucks Cross Ref 4954888 4062569 4062568 Assembly Parts original new injector

Engineered for demanding heavy duty operation, the 4384260 diesel fuel injector serves as a core fuel delivery component for the Cummins QSK15 engine family, covering QSK15, QSKX15, ISX15, QSX15 and X15 15L platforms. This unit is built to deliver accurate fuel metering, fine atomization and stable injection response across the QSX15 power range of 450–675 hp and 1650–2050 lb-ft torque, supporting reliable combustion in continuous industrial service.

Wide replacement compatibility makes this injector a strong catalog item for distributors and fleet operators. It cross references to a broad set of numbers, including 4088301, 4088327, 4062569, 4928260, 4954888 and 4088665, allowing straightforward sourcing for service and rebuild programs. Cummins officially lists QSX15 applications in agriculture, construction, mining, oil and gas, rail, drilling and well servicing, so this component suits large excavators, wheel loaders, graders, mining trucks, generator sets, oilfield equipment, heavy trucks, rock drills and compressors worldwide.

Injector service life depends on fuel cleanliness, correct filtration and proper installation. Replace fuel filters on schedule, drain water from the fuel system and avoid contaminated diesel. When metal debris is found, inspect the pump, rail, lines and return circuit before fitting a replacement. Common failure symptoms such as hard starting, rough idle, misfire, smoke, power loss and fault codes should be confirmed through professional diagnosis.