Caterpillar original Fuel Injector 170-5181 Replacement for OEM 0R-1740 Cross Reference 7W-7032 for Engine 3304B 3306C 3306 with 0R-3424 for Excavator 235B 350 original new injector

At the final stage of diesel fuel delivery, the CAT 170-5181 injector nozzle converts pressurized fuel into a finely atomized spray for combustion. Designed for high-pressure diesel injection systems, it supports precise fuel metering, optimized spray patterns, combustion efficiency, power generation, emissions control, and engine reliability. The nozzle is manufactured from high-speed alloy steel with precision heat treatment and to OEM-equivalent dimensional standards and fuel atomization requirements.

During operation, the injection pump pressurizes diesel fuel and delivers it to the injector assembly. When pressure exceeds the calibrated opening pressure, the nozzle needle lifts, allowing fuel to exit through precision orifices. The resulting spray mixes with compressed air in the combustion chamber, supporting efficient power generation while helping to reduce fuel consumption and exhaust emissions. Key product advantages include excellent atomization efficiency, improved fuel economy, stable engine performance, long service life, industrial-grade reliability, and OEM-compatible installation.

The 170-5181 may be used in selected Caterpillar diesel engine platforms, including the 3406 engine family and industrial, generator, marine, mining, and construction equipment engines. Equipment categories include excavators, wheel loaders, bulldozers, motor graders, mining trucks, generator sets, marine engines, and industrial power units. Final fitment should be confirmed using the engine serial number, injector assembly number, and OEM parts catalog. This brand-new, premium industrial-grade nozzle is covered by a 12-month warranty.