Caterpillar original 2645A751 Common Rail Fuel Injector, for heavy duty diesel engine application, Replacement Part for Diesel Engines, Compatible with 320-0655 original new injector

The Caterpillar original 2645A751 common rail fuel injector is a purpose-built replacement component for CAT C6 series and Perkins 1100 series diesel engines, tailored for B2B engine maintenance, rebuild and fleet operation scenarios. Carrying official OE part number 2645A751, it cross-references CAT part numbers 320-0655 and 3200655, as well as CAT remanufactured part numbers 10R-7674 and 10R-7671 (including their non-hyphenated variants), and is recognized across official Caterpillar and Perkins parts distribution networks. It fits CAT C6.4, C6.6 engines and Perkins 1104D-44TA, 1106D-E66TA industrial power engines.

As an electronically controlled high-pressure common rail injector rated for operating pressures up to 2000 bar, it operates via ECU-coordinated signals that activate the solenoid and needle valve to deliver precisely timed, atomized fuel into the combustion chamber. This industrial-grade component optimizes combustion efficiency, cuts fuel consumption and reduces exhaust emissions, delivering stable performance under sustained heavy-duty operating conditions.

It is compatible with CAT 320D, 320DL, 321D, 323D and 324D excavators, diesel generator sets and industrial power units, serving construction, mining, agriculture, power generation, material handling and marine sectors. For proper installation, technicians must clean fuel lines, use genuine sealing washers, complete ECU coding and conduct injector balance testing to ensure long-term performance.