original 571-0940 Common Rail Fuel Injection Valve for C4.4 C6.6 C7.1 323 GX Excavator Engine Spare Parts Replacement for OEM new original new injector

Engineered exclusively for the C4.4 four-cylinder diesel platform, fuel injector 571-0940 is a precision-manufactured OE-equivalent component designed to integrate seamlessly with 3044, 3044C, 3054, and 3054C engine variants. Its dimensional tolerances strictly follow original equipment specifications, ensuring direct fitment at the cylinder head mounting position without modification. This precise engineering guarantees stable fuel metering, controlled injection timing, and consistent atomization throughout the full operating range, supporting the combustion characteristics these inline four-cylinder engines require for reliable cold starting and steady load response.

Manufactured through CNC precision machining, the injector incorporates a hardened steel nozzle and internal valve assembly, complemented by a surface treatment that delivers resistance to corrosion, thermal cycling, vibration fatigue, and fuel contamination. The calibrated spray pattern is optimized to improve combustion efficiency, reduce fuel consumption, and lower particulate matter and exhaust smoke output. Each unit is built to handle the high-pressure fuel delivery demands of the C4.4 injection system while maintaining thermal stability under continuous duty, making it a dependable choice for OEM-level replacement.

This injector is widely applied across construction machinery, mining equipment, agricultural power units, industrial generator sets, and marine auxiliary systems powered by C4.4, 3044, or 3054 series engines. To preserve long-term injection accuracy, scheduled maintenance is recommended: inspect fuel filters at 250 hours, check injector condition at 500 hours, test spray pattern at 1000 hours, clean the fuel system at 2000 hours, verify calibration at 3000 hours, and perform a complete injector inspection at 5000 hours.