Cummins original Fuel Injector 1521978 ISX15 X15 5.0 DC12.14 Engines R420 Ms2130 Equipment Cross Ref 2941767 4928260 Truck Assembly Parts for Machines Control original new injector

Engineered for demanding heavy duty service, the 1521978 diesel fuel injector delivers a dependable fuel injection solution for Cummins QSK15 and QSX15 15L engines. As an original type replacement component, it supports accurate fuel metering, fine atomization and stable injection response across a wide range of industrial operating conditions. It carries broad cross reference coverage including 4076963, 4903028, 570016, 4954646, 4076965 and 4076912, giving distributors strong catalog value.

This common rail injector is built to withstand continuous heavy load duty cycles found in excavators, wheel loaders, mining trucks, generator sets, oilfield machinery, heavy trucks, rock drills, compressors and industrial power units. Cummins lists the QSX15 for commercial industrial generator platforms rated at 50/60 Hz, 291–455 kW prime and 320–500 kW standby. Fitment must be confirmed by ESN, CPL, old injector number and physical comparison before purchase.

Injector service life depends heavily on fuel cleanliness, correct filtration and proper installation. Operators should replace fuel filters on time, drain water from the fuel system, avoid contaminated diesel and follow the engine maintenance schedule. Common failure symptoms such as hard starting, rough idle, misfire, white or black smoke, power loss, high fuel consumption and fault codes can be verified through professional fuel pressure, injector return and cylinder cut-out testing.