original 20R-1264 Common Rail Injector Assembly for 3512 3508B 3516B 3512B Diesel Engine Fuel Injector Generator Set GEN SET Replacement OEM 392-0200 3920200 original new injector

Engineered for heavy-duty diesel operations, the 20R-1264 fuel injector delivers dependable high-pressure fuel atomization for 3500 Series power units. This precision-machined injector assembly serves as a direct replacement solution cross-referenced with 392-0200, 386-1752, 10R-1284, 0R-9944, 229-0197, 250-1300, 162-8813, and 144-5665, ensuring broad interchangeability across OEM and aftermarket procurement channels for global industrial buyers.

Built with wear-resistant internals and corrosion-resistant materials, the 20R-1264 supports continuous-duty service in demanding environments. It fits 3512B, 3508B, and 3516B engines, including 3512B HD and 3512B Marine variants, and is widely deployed in marine vessels, generator sets, mining machinery, construction equipment, industrial power plants, oil & gas facilities, emergency backup systems, and agricultural installations. Additional cross numbers include 246-1854, 392-0205, 386-1757, 10R-7237, and 244-7748, giving procurement teams flexible sourcing options. Each unit undergoes performance testing to verify spray pattern, flow balance, and OEM calibration compliance for stable long-term operation.

Recommended service practices include daily visual checks for fuel leaks, monitoring engine idle smoothness, and observing exhaust smoke condition. Scheduled maintenance covers fuel filter replacement, injector flow balance testing, return line cleanliness inspection, fuel pressure verification, and ECM diagnostic log review. Typical fault indicators include hard starting from injector wear, black smoke from over-fueling or poor atomization, white smoke from timing deviation, rough idle from uneven delivery, and elevated fuel consumption caused by internal leakage.