Cummins original 4088431 Diesel Common Rail Fuel Injector Assembly Replacement for QSK23 Engine Suitable for Auto Construction Machinery Large Mining Machine Generator Part Nos 4077076 6560-11-1114

Built for the demands of continuous industrial duty, the 4088431 fuel injector delivers dependable performance across the Cummins QSK23 platform, including QSK23 CM2250 K109 and QSK23 CM500 engine control variants. Engineered for accurate fuel metering and high-pressure injection compatibility, it maintains a stable spray pattern that supports clean combustion efficiency and consistent cylinder contribution in 23 L heavy-duty applications rated 760–950 hp / 567–708 kW.

This injector suits generator sets, mining equipment, oilfield and well-servicing units, construction machinery, marine auxiliary power, and industrial power installations. With strong cross-reference coverage to 4902827, 4062090, 4077076, and 4076533, it simplifies sourcing for rebuild shops, heavy equipment fleets, and diesel parts distributors across North America, Latin America, the Middle East, Africa, Southeast Asia, India, Europe, and Australia. Durable construction and effective leakage control help protect the engine and support fast replacement during scheduled service.

Injector service life depends on clean fuel, clean oil, correct filtration, water control, and proper installation. Replace fuel filters on schedule, drain the water separator, monitor smoke and starting performance, test return fuel flow, and scan ECM fault codes. Diagnosing hard starting, rough idle, black smoke, power loss, or high fuel consumption should include fuel pressure testing, return flow testing, cylinder contribution testing, and injector number verification.