original 10R-7221 Diesel Fuel Injector for C7 C9 Engine E324D 325D 326D2 E329D 330D 336D2 Excavator Parts Replacement for OEM 387-9433 328-2574 266-4446 original new injector

Engineered as a heavy-duty replacement solution, the 10R-7221 diesel fuel injector delivers precision-controlled fuel atomization for C9, C9 ACERT, and C9.3 engines operating in demanding industrial environments. Cross-referenced with OE numbers 326-0675, 3260675, and 10R7221, this electronic unit injector is manufactured to strict OEM calibration standards, ensuring plug-and-play compatibility with excavators, wheel loaders, motor graders, generator sets, and marine propulsion systems.

Built with CNC-machined internal components and micron-level tolerance control, the injector features heat-resistant materials, corrosion-resistant coatings, and wear-resistant valve assemblies for extended service life under high-pressure operation. Performance benefits include improved fuel efficiency, reduced exhaust smoke, lower fuel consumption, stable engine idle quality, and enhanced power output. The injector is ideal for C9 industrial power units, standby and prime power generators, Olympian generator systems, and heavy construction or mining machinery where reliability is critical.

Installation requires disconnecting the battery, relieving fuel pressure, cleaning the injector bore, fitting a new sealing kit, and applying specified torque, followed by programming and leak testing where required. Recommended service interval is every 2,000 to 4,000 operating hours, depending on fuel quality and duty cycle. Backed by a 12-month warranty, this injector supports daily inspection routines and scheduled maintenance programs across power generation, marine, and off-highway sectors.