original New 320-0690 3200690 10R-7673 10R7673 2645A749 Common Rail Fuel Injector for C4.4 C6.6 Engine Excavator 320D 323D Diesel Parts original new injector

Engineered for demanding fuel delivery requirements in heavy industrial diesel engines, the 2645A749 fuel injector is a precision-built replacement component designed for C6 and C6.4 series power units, as well as 3054 and 3056 engine platforms. Cross-referenced against OE numbers 2645A749, 10R7220, and 10R7221, this injector assembly ensures direct fit compatibility and reliable operation within common rail diesel injection systems installed on excavators, loaders, generator sets, and mining machinery.

Manufactured with advanced CNC machining and strict dimensional tolerances, the injector delivers high-pressure resistance, superior atomization, and accurate fuel metering for complete combustion. Optimized nozzle geometry supports improved fuel efficiency, reduced particulate emissions, and stable engine performance under sustained heavy-duty loads. Protective anti-corrosion coatings guard against diesel contaminants, while robust internal components extend service life in harsh construction, mining, agricultural, and marine auxiliary environments. Typical applications include hydraulic excavators, wheel loaders, backhoe loaders, motor graders, prime and standby generator sets, agricultural tractors, harvesters, and commercial marine engines.

Installation requires verification of part compatibility, thorough cleaning of the injector bore, replacement of sealing washers, and torque tightening to specification, followed by system priming, leak inspection, and diagnostic verification. This injector effectively addresses hard starting, black smoke, power loss, and elevated fuel consumption caused by worn or blocked injectors, restoring optimal engine performance for professional B2B fleet operators and equipment maintenance providers.