original 10R-7221 Fuel Injector 268-1835 295-1411 387-9433 557-7633 for C7 C9 Engine 326D2 336D2L Spare Parts new injector original new injector

The C9 Fuel Injector 10R-7221 / 326-0675 is engineered as a direct OEM replacement for C9, C9 ACERT, C9.3, and related C9-series diesel engines used across excavators, wheel loaders, motor graders, generator sets, marine propulsion units, and industrial power modules. Each injector is manufactured with CNC-machined components and micron-level tolerance control to ensure precise fitment and reliable operation within the C9 common rail fuel system, supporting stable combustion and consistent engine performance under demanding load conditions.

Constructed from heat-resistant alloys with a corrosion-resistant coating and wear-resistant internal components, this common rail diesel injector is built to withstand the high-pressure and high-temperature environment of the C9 ACERT engine platform. Every unit is 100% flow tested prior to shipment, and the product is backed by a 12-month warranty, helping end users achieve improved fuel efficiency, reduced exhaust smoke, lower fuel consumption, and minimized maintenance cost over an extended service life.

Routine maintenance includes regular fuel filter replacement, use of ultra-clean diesel, periodic injector balance testing, and monitoring of injector correction values, with a recommended service interval of every 2,000 to 4,000 operating hours depending on fuel quality and working environment. The authorized cross reference numbers 10R-7221, 10R7221, 326-0675, and 3260675 ensure full compatibility with the specified C9 engine families used in construction, mining, agricultural, oil and gas, and standby power applications.