original 386-1769 Diesel Engine Common Rail Fuel Injector for C3500 3508 3512 3516 C3500B Excavator 5130B 5230B Parts Replacement OEM original new injector

Engineered for heavy-duty diesel platforms, the 386-1769 Electronic Unit Injector (EUI) delivers OEM-equivalent fuel delivery performance for 3512B, 3512B HD, 3512B Marine, 3516B, 3516B Marine, 3516B Industrial and select C175 Series large-bore diesel engines. Cross-referenced with 10R-7224 and 20R-8063, this injector integrates directly into the cylinder head and communicates seamlessly with the engine ECM, providing precise, high-pressure fuel atomization to support prime power, standby power and continuous-duty operations across demanding global markets.

Manufactured to ISO 9001 standards, the 386-1769 injector features precision-machined components, hardened internal parts, corrosion-resistant materials and OEM-level calibration. Advanced nozzle technology combined with high-pressure injection performance ensures accurate fuel metering, improved combustion efficiency, enhanced engine power output, reduced exhaust emissions and lower fuel consumption. The injector is fully compatible with electronic control systems, delivering stable engine operation and extended service life in critical applications including data center backup power, tugboats, cargo ships, offshore support vessels, haul trucks, drilling rigs, fracturing units and industrial process plants.

Installation requires a clean environment, inspection of the cylinder head injector bore, new seals and O-rings, proper torque specifications, fuel system bleeding, ECM communication verification and injector calibration where applicable. Recommended diagnostic procedures include ECM fault code reading, injector balance testing, fuel pressure testing, cylinder cutout testing, fuel quality analysis and injector flow testing to ensure reliable long-term performance.