original 10R-9348 Common Rail Fuel Injector for 3126B 3126E C7 C9 Diesel Engine Excavator Spare Parts Replacement for OEM 171-9710 222-5965 original new injector

Engineered as a direct OEM-grade replacement, the 10R-9348 diesel fuel injector delivers precision-metered fuel flow for 3126B, 3126E, and C7 series engines operating in demanding commercial and industrial environments. Cross-referenced with 175-3700 and 0R-8479, this injector assembly is manufactured to strict tolerances and validated against factory performance benchmarks, ensuring seamless integration with the original high-pressure fuel injection system without recalibration or modification.

Designed for heavy-duty service, the 10R-9348 injector features a robust nozzle geometry that optimizes spray atomization, promoting complete combustion, improved fuel efficiency, enhanced engine power output, and reduced exhaust smoke emissions. Its reinforced internal components and hardened sealing surfaces support extended service intervals in fleet trucks including Freightliner, Peterbilt, Kenworth, and Sterling, as well as construction equipment, marine vessels, agricultural machinery, and stationary generator sets deployed across global markets.

Installation requires thorough cleaning of the fuel system, inspection of injector bores, replacement of sealing washers and O-rings, and torque application per manufacturer specifications, followed by leak testing and fuel pressure verification. Recommended diagnostics include spray pattern inspection for hard starting, nozzle inspection for black smoke, fuel delivery volume testing for power loss, and injector balance verification for rough idle conditions. Using high-quality diesel fuel and replacing filters regularly ensures long-term reliability and consistent operational performance.