Caterpillar original Diesel Common Rail Fuel Injector 10R-7674, 321-0990, 10R-7672, 10R-7939, Replacement OEM for Caterpillar C6.6, C6.4, Excavator 320D, E320D original new injector

Purpose-built for Caterpillar C6 series diesel engine platforms, the 10R-7674 common rail fuel injector is a genuine OEM-grade replacement component engineered to restore factory-spec engine performance across demanding conditions. It is compatible with standard C6, C6.4, industrial-rated, generator set, and marine C6 engine variants, and fits a broad portfolio of heavy-duty equipment ranging from excavators and wheel loaders to agricultural machinery, marine propulsion systems, and stationary industrial power units. It adheres to all original Caterpillar design requirements for seamless fitment.

As an electronically controlled precision fuel metering device, the 10R-7674 is actuated by the engine’s electronic control module (ECM) to deliver timed, atomized fuel directly into the combustion chamber. This optimized fuel delivery supports complete air-fuel combustion, boosting thermal efficiency, reducing fuel consumption and exhaust emissions, enhancing power output, and lowering engine operating noise. Every unit undergoes 100% factory performance testing to verify stable injection pressure, consistent delivery accuracy, and strong thermal stability for long service life in construction, mining, and power generation environments.

For equipment fleet operators, maintenance providers, and industrial parts distributors, this injector delivers a cost-effective, reliable replacement solution backed by global aftermarket support. It cross-references directly to OEM part numbers 326-4700 and 320-0680 to eliminate fitment errors, and follows standard Caterpillar service protocols for straightforward installation and routine maintenance. Using quality diesel fuel and replacing filters on schedule further extends its service life.