Caterpillar original C9 Engine Fuel Injector 10R-4764 10R-7221 293-4071 293-4072 293-4073 293-4074 for 330D 336D 336D2 D300GC Excavator Generator OEM original new injector

The Caterpillar CAT C9 Fuel Injector 10R-4764 is an OEM-specification diesel common rail injector engineered to deliver precise fuel metering and consistent spray patterns across demanding industrial operating environments. Built with advanced atomization technology and high-pressure capability, this injector ensures stable combustion, optimized fuel efficiency, and reliable cold-start performance for CAT C9 and C9 ACERT engine platforms. Each unit undergoes precision machining and OEM calibration to meet original factory tolerances, providing a direct-fit replacement for the authorized cross references 254-4339 and 387-9433 without modification.

Manufactured with corrosion-resistant internal components and heavy-duty solenoid assemblies, the 10R-4764 injector is designed to withstand elevated rail pressures, vibration, and thermal cycling common in excavators, wheel loaders, motor graders, articulated trucks, generator sets, and marine propulsion systems. The robust construction extends service intervals, reduces unscheduled downtime, and supports long-term engine reliability in construction, mining, power generation, and marine applications. Strict dimensional control and material traceability ensure consistent performance across fleet installations.

Routine maintenance plays a critical role in preserving injector functionality and protecting the broader fuel system. Operators should use high-quality filtered diesel, replace fuel filters at recommended intervals, avoid water contamination, monitor fuel rail pressure, and conduct periodic injector balance testing alongside ECM fault code analysis. Proper diagnostics, including return flow measurement and cylinder cutout testing, help identify declining injectors before secondary engine damage occurs, ensuring the CAT C9 power plant continues to operate at rated output throughout its service life.