Caterpillar original Diesel Engine Fuel Injector 173-4059 for Caterpillar 3412, 3408, 3412E, 3126B, 3512B, 5110B, Replacement for OEM 20R-0760, Cross Reference 20R-0759, 0R-9348 original new injector

Engineered for Caterpillar 3412 engine platforms, the 173-4059 diesel fuel injector is a precision OEM-standard fuel system component built to withstand harsh heavy-duty operating conditions. It is compatible with 3412, 3412B, and 3412C engine variants, as well as purpose-built 3412 marine, generator, and industrial engine configurations. The injector is widely used in diesel generator sets, marine propulsion systems, mining trucks, oilfield drilling units, industrial pumps, compressor stations, and mobile power units across global Caterpillar-powered equipment fleets.

Operating as a critical metering and atomization component within the diesel fuel injection system, the 173-4059 follows a controlled six-step process to support consistent engine performance. It delivers pressurized fuel in line with engine timing parameters, atomizing fuel through precision nozzle orifices to enable efficient combustion with compressed air. This design delivers tangible operational benefits including accurate fuel metering, improved combustion efficiency, enhanced power output, reduced fuel consumption and emissions, reliable cold starting, stable idle performance, and extended engine service life.

Manufactured to strict Caterpillar OEM specifications, the 173-4059 injector requires installation per official service guidelines, including calibrated torque application and post-installation leak and performance checks. Export packaging is available for international B2B orders, and final compatibility must be confirmed using engine serial number, arrangement number, and injector trim code before fitment. Adherence to recommended maintenance practices, such as regular fuel filter replacement and water contamination prevention, supports long-term reliable operation.