Caterpillar original 10R-7221 Diesel Fuel Injector for Caterpillar C7 C9 Engine, Replacement for OEM 263-8218, 10R-7224, 328-2578, Fits E324D 326D2 336d2 336D2L Excavator Parts original new injector

Reliable fuel atomization begins with a precision-engineered injector, and the Caterpillar 10R-7221 fuel injector is built to meet that standard. Designed for the CAT C7 and C7 ACERT engine family, this original new diesel injector is manufactured to Caterpillar OEM specifications, delivering accurate fuel metering, optimized combustion efficiency, reduced emissions, and long-term operational reliability. It is widely applied in commercial trucks, city buses, construction and mining equipment, agricultural machinery, marine engines, and power generation systems.
The 10R7221 injector operates through an electronically controlled fuel injection system. Fuel is supplied from the fuel rail, the engine control module (ECM) calculates injection timing, and the injector solenoid opens the needle valve to deliver high-pressure, atomized diesel into the combustion chamber. This process maximizes combustion efficiency while minimizing exhaust emissions. Industrial-grade advantages include high-precision machining, advanced fuel atomization, stable fuel delivery, corrosion resistance, high-temperature resistance, and extended service life, helping reduce fuel consumption and improve engine responsiveness.
For B2B buyers, the injector is supplied with OEM-level quality inspection, professional packaging, batch traceability, and worldwide shipping support. Cross reference numbers include 10R7221, 249-0713, 2490713, 328-2585, and 3282585, simplifying parts lookup and inventory management. Best practices—using ultra-clean diesel, replacing fuel filters regularly, and performing injector balance testing—help maintain performance, while symptoms such as white or black smoke, engine knock, reduced power, and ECM fault codes indicate when replacement is required.