Cummins original Y431K05246 Common Rail Diesel Fuel Injector Assembly 0986435612 for Cummins QSK19 QSK38 QSK50 QSK60 Diesel Engine Fuel Injector original new injector

The Y431K05246 Cummins diesel fuel injector is a heavy-duty common rail component for QSK Series industrial engine fuel-injection service, with QSK19 as the primary search application. Also searched as Y 431 K05 246 and Y-431-K05-246, it is associated in supplier listings with cross references 4089972, 4928104, FO0BJ60578 and F0OBLOJ014. Within the fuel system, the injector receives high-pressure diesel and meters it into the combustion chamber according to the engine control strategy.

A correctly matched injector can help restore starting performance, idle stability, combustion efficiency, fuel economy, load response, exhaust smoke control and cylinder balance. The QSK19 Series is a 19 L inline six-cylinder diesel engine; relevant versions use high-pressure injection, Modular Common Rail Fuel System technology and integrated electronic controls. This product is relevant to generator sets, mining and crushing power units, oilfield pump drives, rail power units, marine auxiliary engines, construction equipment, industrial power packs and engine rebuild projects, serving repair shops, rebuilders, fleets and parts distributors.

Supplier listings also mention QSK38 and QSK60, while QSK23 appears on some inconsistent pages; these are not confirmed primary fitments. Before shipment, verify the old injector number, engine serial number, CPL, ECM model and injector photo. Y431K05248 should not be treated as equivalent unless markings, engine data and supplier confirmation match. This verification-led approach supports accurate maintenance, overhaul and repair sourcing for global B2B buyers.