Caterpillar original Caterpillar original Caterpillar 0R-9803 0R9803 Fuel Injector 232-1173 232-1168 for 3412 C3412 3412E Engine 375 5080 D9N 773D 992C Truck Excavator Diesel original new injector

The Caterpillar 0R-9803 fuel injector is a remanufactured direct replacement component engineered for the CAT 3412 engine series, including 3412B, 3412C, and 3412 DITA configurations. Each injector is assembled with a precision-machined nozzle and internal components calibrated to original fuel flow specifications, ensuring consistent high-pressure fuel delivery across demanding operating cycles. The unit is remanufactured to OEM specifications and individually factory-tested under strict fuel system performance standards, providing reliable atomization, optimized combustion efficiency, and stable engine output in continuous-duty industrial environments.

This injector is compatible with cross reference numbers 4W-7018, 7E-6408, and 8N-7005, allowing direct substitution across a wide range of CAT 3412-powered generator sets, marine propulsion systems, mining trucks, construction machinery, and oilfield equipment. Wear-resistant internal components and corrosion-resistant materials contribute to extended service life under heavy-load conditions, while improved fuel atomization supports increased engine power, reduced exhaust smoke, lower fuel consumption, and minimized cylinder wear for long-term operational economy.

Prior to installation, operators should replace the fuel filters, clean the injector bore, inspect the fuel lines, verify the sealing surfaces, and follow Caterpillar torque specifications. After installation, bleeding air from the fuel system and performing an engine performance test is recommended. Routine maintenance—including the use of clean diesel fuel, regular filter replacement, and periodic injector balance testing—helps maintain consistent injection performance and supports dependable engine operation throughout the service life of the fuel system.