Caterpillar original 3512A Series Diesel Engine Parts Fuel Injector OR-3051 Cross Reference 4P-9075, for Construction Machinery, Replacement for OEM 7E-9983 original new injector

Engineered for uncompromising performance in heavy-duty diesel operating environments, the Caterpillar OR-3051 fuel injector is a precision-machined replacement component built to meet or exceed OEM specifications for CAT 3500 Series high-output engines, with primary fitment for the 3512A platform. It supports cross-referencing with 4P-9075, 7E-3381, and 9Y-4543 part numbers, and is available in both new and remanufactured configurations to align with diverse operational and budget needs.

This high-pressure direct diesel injector operates by receiving pressurized fuel from the fuel pump, opening a calibrated needle valve at set injection pressure, and atomizing fuel through precision-drilled orifices to deliver an optimized spray pattern into the combustion chamber. Controlled injection timing enhances combustion efficiency, reduces soot and emissions, improves fuel economy, and sustains performance under heavy loads, while corrosion-resistant alloy steel construction and multi-point calibration ensure reliability in harsh conditions.

It is compatible with CAT 3512, 3508, 3508C, and 3516 engines in addition to the 3512A, and serves generator sets, industrial power systems, petroleum modules, marine propulsion engines, and mining power platforms across global markets. Proper installation requires system cleaning, new seals, CAT-specified torque, fuel bleeding, and idle and full-load testing, while routine maintenance includes visual checks, filter replacement, and scheduled flow and spray testing.