Caterpillar original 7C-2239 Fuel Injector: Common Rail Diesel Injector, for heavy duty diesel engine application, Replacement OEM Cross Reference 7E-6408 9Y-1785 0R-0906 original new injector

Engineered to align with Caterpillar’s strict OEM performance criteria, the original new 7C-2239 high-pressure diesel fuel injector assembly is purpose-built for 3512A series and compatible CAT heavy-duty diesel engines. It carries official OE part numbers 7C-2239 and 7C2239, with seven fully validated cross-reference numbers to support flexible, cost-effective replacement sourcing. Constructed from hardened alloy steel, it operates at 1800–2200 bar and features a direct-fit design requiring no on-site modification, while meeting all OEM tolerance requirements.

After calibrated pressurization from the engine’s high-pressure fuel pump, the injector’s needle valve lifts at a preset threshold to release fuel. Its precision multi-hole nozzle delivers finely atomized diesel directly to the combustion chamber at exact timing, enabling complete fuel burn, improved fuel economy, lower emissions and stable power output. Robust heat and pressure resistance supports continuous operation in extreme industrial conditions, while hardened alloy construction resists wear, corrosion and thermal stress to extend service life.

This injector supports heavy-duty equipment across core industrial sectors including mining, marine propulsion, power generation, oil and gas, construction, manufacturing and railway power units. It fits mining trucks, construction loaders, marine engines, standby generators, oilfield service engines and industrial pump units, and includes a 12-month warranty as a reliable overhaul and replacement solution.