Cummins original Common Rail Fuel Injector 4307468 5491515 4307475 4921827 for Cummins ISG12 ISG Diesel Engine Spare Parts Machinery Engine Fuel Injector Assembly original new injector

Engineered for demanding diesel applications, the 4307468 common rail fuel injector delivers precise, OEM-calibrated fuel metering across a broad range of Dongfeng Cummins power systems. Cross-referenced to 0445110378, 0445110230, 9308-621C, and 9308Z621C, this component is a direct replacement built for ISDE4.5, ISDE6.7, ISBE, QSB4.5, and QSB6.7 diesel engines, supporting fleet operators, OEM assemblers, and aftermarket distributors seeking dependable injection performance.

Construction begins with a high-strength alloy steel body paired with a precision hardened control valve and heat-treated nozzle assembly. A corrosion-resistant coating and wear-resistant sealing surfaces extend service life under continuous operation. Each injector provides high-pressure resistance, stable injection quantity, superior spray atomization, and consistent cylinder balancing. Every unit is 100% flow tested, leak tested, solenoid response tested, injection pattern tested, pressure tested, and durability verified to ensure field-ready reliability.

In service, the 4307468 improves combustion efficiency, reduces fuel consumption, lowers emissions, enhances engine power, reduces engine noise, and enables faster cold start performance. It fits commercial trucks, buses, construction machinery, industrial power units, agricultural machinery, generators, and marine auxiliary engines, including Dongfeng Tianlong, Tianjin, and Kingrun platforms. For optimal results, replace sealing washers and O-rings, clean the injector seat, use calibrated torque tools, perform injector coding after installation, and conduct a leak test.