original 306-9380 Common Rail Injector 321-3600 292-3780 2645A709 for Excavator Diesel Engine 320D Fuel System new injector original new injector

The C6.4 and C6.6 diesel engines are widely deployed across excavators, wheel loaders, dozers, generator sets, and industrial power units, requiring fuel injectors that meet strict factory tolerances. This OEM-grade fuel injector is engineered as a direct replacement for part number 306-9380, with full cross compatibility to 10R-7225 and 326-6708, ensuring a precise fit and consistent performance within the C6 engine platform.

Manufactured using precision CNC-machined components and hardened steel internals, this injector incorporates a multi-hole precision nozzle design that supports high-pressure common rail operation. The corrosion- and wear-resistant materials, combined with high-temperature and high-load resistance, allow the injector to perform reliably under the demanding 120–220 HP output range of C6 series engines. Each unit is factory tested for high-pressure and high-temperature performance to deliver stable fuel atomization, improved fuel economy, and reduced emissions in line with OEM specifications.

For maintenance scheduling, operators should conduct visual inspection every 250 hours, fuel system inspection every 500 hours, injector performance testing every 1000 hours, injector cleaning every 2000 hours, calibration checks every 4000 hours, and replacement evaluation at 6000 hours. Best practices include using clean diesel fuel, replacing fuel filters regularly, draining water separators, avoiding contaminated fuel, monitoring engine diagnostics, and performing injector balance tests to maximize service life and maintain engine efficiency.