Caterpillar original Caterpillar original Caterpillar 0R-9348 fuel injector for 3412 3408 3126E 3126B 3512B 5110B engine, common rail diesel injector, replacement for OEM new original new injector

The Caterpillar 0R-9348 fuel injector is an original OE replacement component engineered for the 3412 series diesel engines, including the 3412C and 3412E variants. Built with industrial-grade steel and manufactured to OEM-standard precision tolerances, this injector delivers consistent high-pressure fuel delivery up to 2,000 bar, ensuring reliable combustion performance under demanding heavy-duty operating conditions. Cross-referenced with part numbers 326-1643, 326-1642, and 10R-9348, it provides a dependable direct-fit solution for engine rebuilds and scheduled replacements.

Designed for optimized spray pattern and atomized fuel delivery, the 0R-9348 injector features a valve-controlled mechanism that enables precise injection timing and volume control. This contributes to improved fuel efficiency, lower exhaust emissions, and compliance with industrial emissions requirements. The anti-corrosion materials and high-temperature-resistant construction extend service life in harsh environments, while the threaded installation with O-ring sealing ensures a secure, leak-free fit during routine maintenance and full injector replacement procedures.

This injector is widely used across excavators, loaders, bulldozers, mining trucks, industrial generators, marine engines, and industrial pumps, serving the mining, construction, marine, power generation, and heavy equipment sectors. Installation requires inspection of the injector seat for debris, proper torque application per engine manual, lubrication and correct seating of the O-ring, kink-free fuel line connection, and post-installation injector calibration using OEM-approved diagnostic tools. Regular maintenance—cleaning fuel filters, monitoring spray patterns, and replacing worn O-rings—helps maintain long-term performance and engine reliability.