Caterpillar original Mechanical Fuel Injector Cross Reference 172-5780, 20R-1917, 557-7633, 553-2592 Replacement for OEM, C9 3126 Engine Parts for Excavator original new injector

Compiled from verified Caterpillar public parts listings, the 553-2592 (searchable as 5532592) Injector GP is a fuel injection component purpose-built for Caterpillar CAT C9 series diesel engines. It is commonly specified for heavy-duty Caterpillar excavator models including 330D, 336D, 336D2, and 340DL units fitted with C9 powertrains, supporting engine fuel system replacement and overhaul requirements for construction and industrial equipment.

This diesel common rail injector delivers core fuel system performance including precise diesel fuel metering, optimized fuel atomization, efficient combustion support, consistent engine response, and stable power output for demanding industrial applications. It is designed to serve a broad range of B2B stakeholders, such as excavator repair workshops, fleet maintenance teams, diesel engine rebuilders, heavy equipment parts distributors, mining contractors, and construction machinery dealers across global aftermarket channels.

All listed cross-reference numbers (387-9433, 20R-1917, 572-0119, 10R-7222) are for search and preliminary fitment reference only, and do not guarantee universal interchangeability. Buyers must confirm compatibility via engine model, serial number, machine model, original injector tag, ECU calibration, and official service manual before ordering; mixing genuine and aftermarket injectors in one engine set is discouraged due to differing fuel output and atomization characteristics.