original 171-9704 FUEL INJECTOR GP Diesel Nozzle Assembly 1719710 173-9380 Replacement for OEM new injector original new injector

The 171-9704 fuel injector is engineered as a direct-fit OEM replacement specifically calibrated for the 3126 series diesel engines, including 3126, 3126B, and 3126E variants. Built to match the original HEUI (Hydraulic Electronic Unit Injection) system specifications, this injector integrates seamlessly with the engine's fuel delivery architecture, ensuring precise fuel metering and consistent injection pressure across construction, marine, industrial, and power generation applications.

Manufactured with precision-machined internal components, hardened critical parts, and corrosion-resistant materials, the 171-9704 delivers superior fuel atomization, improved combustion efficiency, and lower exhaust emissions. It cross-references with 0R-8686 and 10R-0955, making it a versatile interchange option for fleet operators and service workshops maintaining 3126 engines in excavators, wheel loaders, trucks, standby generators, and marine auxiliary units.

Routine maintenance practices—including the use of clean diesel fuel, regular fuel filter replacement, prevention of water contamination, and periodic injector flow testing—help maximize the service life of this HEUI injector. The 171-9704 provides heavy-duty reliability, enhanced engine power output, and better cold-start performance, supporting the long-term operational demands of commercial and industrial equipment powered by the 3126 platform.