Caterpillar original Common Rail Fuel Injector for 2645A749 320-0680 10R-7674 10R-7672 320-0677 10R-7671 10R-7939 10R-7673 321-0955 10R-7669 321-0990 320-0690 original new injector

The Caterpillar C6 fuel injector 2645A749 is engineered as a direct OEM-equivalent replacement for CAT C6, C6.4, 3054, and 3056 diesel engines, also cross-referencing 10R7220 and 10R7221. Manufactured using advanced CNC machining and strict dimensional controls, each injector is built to deliver consistent performance under the demanding conditions of high-pressure common rail fuel systems. Its optimized nozzle design promotes superior atomization, supporting more complete combustion, improved fuel efficiency, and reduced exhaust emissions across a wide range of heavy-duty applications.

This injector assembly is designed for reliable service in harsh industrial environments. High-pressure-resistant internal components withstand extreme injection pressures, while protective surface treatments defend against corrosion caused by fuel contaminants and moisture. Accurate fuel metering and stable spray patterns help minimize power loss, excessive smoke, and elevated fuel consumption, making the 2645A749 a dependable solution for engines operating in construction, mining, power generation, agriculture, marine, and industrial manufacturing equipment.

Installation of the 2645A749 follows standard OEM procedures, including verification of part number compatibility, cleaning of the injector bore, inspection of fuel rail connections, and replacement of the sealing washer before torque application. Post-installation checks for fuel leakage, system pressure, idle quality, and acceleration response are recommended to confirm proper function. With its OEM-standard quality, robust construction, and broad engine compatibility, this injector provides a long service life and consistent performance for fleet operators, equipment owners, and industrial maintenance professionals.