Caterpillar original Common Rail Diesel Fuel Injector, for heavy duty diesel engine application, 459-8473, 254-4340, 557-7633, 387-9434, Fits Heavy Construction Machines original new injector

Designed for rigorous heavy-duty diesel engine operating conditions, the Caterpillar (CAT) C9 diesel fuel injector, with primary part number 459-8473 (normalized: 4598473), is an industrial-grade injection component built to support precise high-pressure fuel delivery, efficient fuel atomization, stable combustion, and consistent operational reliability. It is compatible with electronically controlled diesel fuel systems, and engineered to perform in harsh work environments across the construction, mining, power generation, and industrial equipment maintenance sectors.

This injector is primarily specified for CAT C9 diesel engines, and is commonly listed alongside C7/C9 engine applications by global parts suppliers. It is associated with a comprehensive set of replacement, remanufactured, and cross-reference part numbers in the diesel parts supply chain, including core identifiers 10R-7222, 557-7637, 387-9432, 387-9434, 254-4340, T400726, and T434154. Typical compatible equipment covers excavators (such as CAT 336, 336D, E330D, E336D), loaders, generator sets, and other C9-powered construction and industrial machinery.

The offering is tailored for B2B stakeholders including heavy equipment parts distributors, professional diesel repair shops, fleet service providers, mining operators, construction equipment owners, and remanufacturing enterprises. All buyers are advised to confirm compatibility prior to purchase by cross-checking the old injector number, engine serial number, machine model, injector trim code, and ECU calibration requirements. Available product conditions include new, replacement, aftermarket, and remanufactured units, depending on real-time supplier stock.