original 10R-4764 Fuel Injector 293-4071 10R-7221 293-4072 for C9 Engine Excavator Parts new injector original new injector

The C9 Fuel Injector 10R-4764 is engineered as a direct-fit OEM replacement for the C9 and C9 ACERT diesel engine platforms, covering industrial, marine, generator, and heavy equipment applications. Designed specifically for the Electronic Unit Injector (EUI) fuel system, this injector delivers precise fuel metering and advanced atomization to support stable combustion across demanding operating cycles. Its precision-machined internal components and OEM-level calibration ensure consistent injection pressure and accurate fuel delivery, contributing to improved engine power output, enhanced combustion efficiency, and reduced fuel consumption while lowering smoke emissions.

Manufactured to meet original engineering specifications, the 10R-4764 injector provides reliable performance in construction machinery such as the 330D and 336D excavators, 966H and 972H wheel loaders, 140M motor graders, and 730 articulated trucks. It is equally suited for mining trucks, drilling equipment, diesel generator sets, marine propulsion systems, and heavy-duty transportation vehicles. The corrosion-resistant construction and high-pressure capability extend service life and help protect pistons and cylinders under continuous heavy-load operation, while improved cold-start performance ensures dependable ignition in varied environmental conditions.

To maintain optimal injector performance, operators should use ultra-low sulfur diesel that meets fuel specifications, replace fuel filters at recommended intervals, and prevent water contamination within the fuel supply. Routine diagnostic practices—including injector balance testing, ECM fault code review, fuel rail pressure verification, electrical connector inspection, return flow measurement, and cylinder cutout testing—help identify performance deviations early. With cross references including 254-4339 and 387-9433, the 10R-4764 serves as a versatile authorized replacement option for fleet maintenance, equipment rebuilds, and OEM service programs worldwide.