Caterpillar original 10R-7223 20R-8065 Fuel Injector for C9 Engine 330D L 330D Excavator Replacement for OEM Diesel Fuel Pump Injector Nozzle original new injector

The Caterpillar CAT C9 Fuel Injector 10R-7223 is engineered as a high-performance replacement component for CAT C9 and C9 ACERT diesel engines. Designed to meet OEM specifications, this injector serves as a direct alternative to OE numbers 326-4701, 326-4702, and 326-4703, ensuring seamless compatibility across a wide range of Caterpillar heavy equipment and power generation systems. It is suitable for excavators, wheel loaders, motor graders, generator sets, marine engines, and industrial power units operating in construction, mining, agricultural, and marine sectors.

Featuring precision fuel metering technology, the 10R-7223 delivers accurate fuel delivery under varying load conditions, optimizing combustion efficiency and engine output. The high-pressure common rail capability enables stable performance under extreme fuel rail pressures, while the multi-hole nozzle design produces superior atomization for improved fuel spray patterns. Critical internal components are manufactured from hardened alloy steel materials, providing exceptional wear resistance and durability in demanding operating environments. Surface treatment offers reliable corrosion protection against fuel contamination and moisture, extending the overall service life of the injector.

For proper installation and maintenance, operators should always inspect the injector bore before fitting, replace all O-rings and sealing washers, and perform fuel system bleeding after installation. Fuel pressure and injector balance rates should be verified, and high-quality diesel fuel combined with regularly replaced fuel filters is recommended. Water separators should be drained routinely, and contaminated fuel supplies avoided to preserve injector performance. Diagnostic inspections during scheduled maintenance intervals help ensure consistent and reliable operation across all supported CAT C9 engine applications.