Caterpillar original Replacement Common Rail Fuel Injector 7E-3381 for Caterpillar 3508 Engine Cross Reference 9Y-4543 4P-9075 for Excavator Construction Machinery with 9Y-0052 original new injector

Built to deliver consistent performance across high-stakes industrial use cases, the CAT 7E-3381 mechanical diesel fuel injector is precision-engineered to meet OEM specifications for Caterpillar 3500 Series engines, with primary design compatibility for the 3512A engine platform. It cross-references multiple valid part numbers including the CAT remanufactured code 0R-8479, and fits a broad range of 3500 Series engine models spanning 3508, 3512 and 3516 lineups for both marine and generator set configurations.

Constructed from hardened alloy steel with precision-ground surfaces, this heavy-duty injector operates via a mechanical injection process to deliver precisely metered, atomized diesel fuel into the combustion chamber at the exact required timing and pressure. This optimized fuel delivery supports improved combustion efficiency, reduced fuel consumption, lower exhaust emissions, stable engine operation, extended engine service life and maximum power output, while its corrosion-resistant design cuts long-term maintenance needs.

Validated for use across generator sets, marine vessels, mining equipment, oilfield infrastructure, heavy construction machinery and emergency power systems, the injector serves B2B customers across global industrial markets. It comes with a 12-month warranty, and installation and preventive maintenance must follow official Caterpillar guidelines including fuel system cleaning, regular filter replacement and scheduled performance inspections to ensure operational reliability.