Caterpillar original Fuel Injector 387-9434 387-9432 387-9430 387-9433 for C9 Diesel Engine, Excavator TRACK-TYPE Tractor, Compatible with 330D 336D D7R D6R III original new injector

Engineered for the Caterpillar C9 engine platform, the Fuel Injector 387-9434 is a high-precision diesel fuel injection component built for demanding industrial duty. Operating within the Caterpillar HEUI (Hydraulic Electronic Unit Injection) system, it receives high-pressure fuel and delivers accurate metering through electronically controlled solenoid activation. The injector is designed for construction, mining, forestry, agriculture, marine, oil & gas, and industrial power generation environments where continuous operation and reliability are critical.

Built to OEM performance standards equivalent to original Caterpillar injector specifications, this unit provides precision fuel delivery for accurate quantity control and an optimized spray pattern that improves atomization and combustion efficiency. Internal components use premium hardened steel for high wear resistance, while corrosion protection makes the injector suitable for ultra-low sulfur diesel fuel. These characteristics support maximum combustion efficiency, reduced fuel consumption, improved horsepower output, lower exhaust emissions and particulate generation, enhanced cold-start performance, and extended service intervals under high-hour operation.

The 387-9434, also referenced as 3879434 and CA3879434, cross-references remanufactured numbers 10R-7221, 20R-8063, 20R-1938 and replacement numbers 328-2573, 293-4071, 267-9734. It fits the CAT C9 8.8-liter inline six-cylinder turbocharged diesel engine, with typical power outputs from 205 to 375 HP depending on configuration. Proven applications include CAT 330D and 336D excavators, D6R, D6T, and D7R track-type tractors, 160M motor graders, 2290, 511, 521, and 522 forestry machines, plus C9 generator sets and industrial power packs.