Caterpillar original 104-9453 Diesel Fuel Injector, Replacement for OEM 8N7005, fits 3306 Engine, for 330B L Excavator, E330B, cross reference 8N7006, 0R-3418 original new injector

Designed for the final stage of diesel fuel delivery, the CAT 104-9453 injector nozzle is an industrial-grade component for Caterpillar fuel injection systems. Made from hardened alloy steel, it is engineered for high-pressure operation, corrosion resistance, dimensional accuracy, and stable injection performance. A 12-month warranty applies, and reference formats include 1049453 and CAT1049453 for parts identification.

Within the injector assembly, the nozzle meters fuel, atomizes it through microscopic nozzle holes, and forms the spray pattern needed for air-fuel mixing. Accurate atomization supports combustion efficiency, helping to improve horsepower and torque while reducing fuel consumption, emissions, and smoke generation. Its industrial-grade metallurgy is intended to withstand the temperatures and pressures encountered in continuous diesel-engine operation, supporting extended service life and reliable fuel delivery.

The 104-9453 may be used in Caterpillar diesel engine fuel systems depending on injector configuration and equipment specification; no specific engine or machine model is confirmed. Before ordering, verify the engine serial number, injector part number, equipment serial number, and OEM parts catalog. During installation, clean the injector seat, replace sealing washers, use calibrated torque tools, verify pressure settings and spray performance, and inspect for leaks. Routine filter replacement, clean high-quality diesel, water-contamination prevention, and fuel-pressure monitoring help maintain performance. Warning signs include hard starting, black smoke, power loss, and excessive fuel consumption.