original 459-8473 Common Rail Diesel Fuel Injector for C7 C9 Engine E330D E336D Excavator 10R-7222 10R-7224 387-9433 254-4340 Heavy Machinery Fuel Injector original new injector

Engineered as a direct replacement solution for C9 and C7 diesel engine platforms, this fuel injector assembly (OE 459-8473, cross references 10R-7222, 10R-7223, 557-7637, 387-9432, 387-9433, 387-9434, T400726, T434154, 20R-8065, 293-4072, 328-2574, 267-3360) is manufactured for demanding industrial operating conditions. It is widely deployed in excavators, crawler excavators, wheel loaders, generator sets and industrial power units, covering 336, 336D, E330D, E336D and other C9-powered construction machinery in mining, quarry, power generation and fleet repair applications.

The injector delivers high-pressure diesel fuel with stable atomization to support complete combustion, consistent power output and reduced unburned fuel when correctly installed and calibrated. Electronic injection control enables precise injection timing and fuel quantity metering when matched with the correct engine management system. Heavy-duty construction is designed to withstand continuous industrial duty cycles, vibration exposure, thermal cycling and long service intervals, making the assembly suitable for repair shops, distributors and remanufacturers replacing failed, worn or contaminated injectors.

For optimal service life, use clean diesel fuel meeting engine requirements, replace fuel filters at recommended intervals, drain the water separator regularly and monitor fuel pressure and return flow. Professional test-bench inspection is recommended to verify spray quality and internal leakage. Units are supplied in sealed packaging with protective caps to prevent contamination during storage and installation.