original Diesel Engine Fuel Injector 173-9272, for heavy duty diesel engine application, 232-1173, 174-7527, 20R-4147 for 3412E, 3126B, 3512B, C31, 5110B Common Rail original new injector

Built for demanding diesel operations, the 173-9272 fuel injector is a precision-engineered component for 3412, 3412B and 3412C engines, including marine, industrial, generator set and power module configurations. Installed in the cylinder head, it supports diesel generator sets, marine propulsion systems, mining trucks, excavators, oilfield equipment, offshore equipment and industrial power plants. Manufactured to OEM specifications with -equivalent performance, it is suited to heavy-duty applications requiring consistent fuel delivery and dependable engine operation.

As a precision fuel-metering device, the injector remains closed until the specified pressure lifts the needle valve. High-pressure diesel then atomizes into a fine mist that enters the combustion chamber, supporting efficient combustion before the injector closes after each cycle. This process helps deliver accurate fueling, improved fuel economy, reduced exhaust emissions, increased engine power, better cold starting and lower operating costs. A precision-machined body, wear resistance and corrosion-resistant construction further support enhanced atomization, reliable operation under heavy loads and long service life.

During replacement, technicians should clean the injector bore, inspect sealing surfaces, apply the correct torque, bleed the fuel system and perform a leak inspection before verifying engine operation. Maintenance should include clean diesel fuel, regular fuel-filter replacement, water-contamination prevention, exhaust-smoke monitoring and periodic injector testing in accordance with schedules. A 12-month warranty is provided.