Caterpillar original Replacement Fuel Injector 254-4340 459-8473 for Caterpillar C9 Engine, Cross Reference 10R-7221 10R-7223, Suitable for Excavator E330D E336D original new injector

Engineered as a purpose-built replacement for Caterpillar heavy-duty fuel systems, the 254-4340 diesel fuel injector is a core engine component designed exclusively for compatibility with the CAT C9 diesel engine platform. Listed under alternate search identifiers 2544340 and CA2544340, this injector assembly is most commonly matched to Caterpillar 330D, 336D, 336DL, and 336DLN excavator models across verified aftermarket supplier databases.

Built to support reliable industrial diesel operation, the injector is optimized for precise fuel delivery, atomization control, combustion stability, responsive engine performance, consistent fuel efficiency, emission compliance, and extended service life. It is suited for demanding heavy-duty operating environments across construction, mining, quarrying, earthmoving, infrastructure, and heavy equipment maintenance sectors, aligning with the C9 platform’s 8.8L inline six-cylinder, turbocharged aftercooled direct-injection design.

All listed cross-reference part numbers are provided for search and identification purposes only, and do not guarantee one-to-one direct replacement compatibility. Buyers must confirm pre-purchase fitment via engine serial number, original injector part number, machine model, and fuel system calibration configuration prior to ordering. Units are available as single injectors or full matched sets to support routine repair, full overhaul, and large fleet maintenance requirements.