Caterpillar original C9 Engine Fuel Injector 20R-1259 573-4231 for Excavator Truck, Replacement for OEM 10R-2828, Compatible with E330D E336D and 573-4235 original new injector

Built to withstand the severe operating conditions of heavy-duty diesel sectors, the CAT 20R-1259 is a precision-engineered fuel injector developed for Caterpillar C9 and C9 ACERT 8.8L inline-six engine platforms. Manufactured to OEM-level specifications as a direct genuine replacement, it matches original equipment fit and function, and cross-references with verified part numbers 237-3300, 236-3300, 10R-4761, 249-0712 and 328-2585 to simplify parts sourcing for maintenance teams.

Constructed with CNC-machined micron-tolerance components, high-pressure rated alloy steel and corrosion-resistant surface treatment, the injector delivers exceptional thermal stability and long service life in high-pressure common rail fuel systems. Regulated by the engine’s electronic control module based on real-time load, speed, throttle position, air intake and coolant temperature data, it injects precisely timed, finely atomized diesel to enable faster ignition, more complete combustion, improved horsepower output, lower fuel consumption and reduced emissions.

Compatible with a wide range of CAT heavy equipment including E330D/E336D excavators, 950H/966H wheel loaders, D6R/D7R dozers, industrial generator sets and commercial marine systems, it supports construction, mining, power generation, oilfield and marine operations. Backed by a 12-month warranty, it is a reliable solution for fleet operators, engine rebuild workshops, equipment dealers and global aftermarket distributors seeking OEM-standard fuel system components.