original 250-1302 Common Rail Fuel Injector for C3500B 3512B 3516B Engine 797 793C 789C 793D Excavator Truck Diesel Injector GP Aftermarket Parts original new injector

Engineered as a direct replacement solution for high-output diesel platforms, the 250-1302 Fuel Injector Assembly delivers OEM-calibrated fuel metering for 3512B engines and related 3516B and 3508B series power units. Cross-referenced with 10R0957 and 20R2057, this injector is manufactured to interchange precisely within the original high-pressure fuel injection system, ensuring seamless integration into cylinder head fuel injection ports without modification. Each unit undergoes precision nozzle machining and flow calibration to maintain consistent atomization across all operating loads.

Built for continuous-duty industrial service, the 250-1302 features a heavy-duty structural design with corrosion-resistant construction to withstand the demanding environments of marine propulsion, offshore power modules, mining haul systems, oil and gas fracturing equipment, and utility standby generator sets. Key performance benefits include precise fuel metering, improved combustion efficiency, reduced particulate emissions, enhanced cold-start performance, and increased engine power output. Stable spray geometry supports balanced cylinder firing and lower fuel consumption throughout long operational lifespans.

Recommended installation involves depressurizing the fuel system, cleaning the injector seat, fitting new sealing components, and torquing to specification, followed by leak inspection and engine performance verification. Routine maintenance should include clean diesel fuel usage, scheduled filter replacement, exhaust smoke monitoring, and periodic injector calibration testing. Common failure indicators—black exhaust smoke, power reduction, or excessive fuel consumption—are addressed through timely replacement with the 250-1302 assembly.