original 10R-1278 Common Rail Diesel Injector Assembly for 793D D11R Excavator C3500B 5130B 5230B Truck Engine Parts original new injector

Engineered specifically for the 3512B V12 diesel platform, the 10R-1278 fuel injector delivers precise atomization and consistent fuel metering across high-horsepower industrial applications. This OEM direct-replacement unit is manufactured to micron-level tolerances, ensuring seamless integration with the engine's electronic fuel injection system without the need for calibration modifications. The advanced multi-hole nozzle geometry and high-pressure resistant construction make it well-suited for continuous-duty operation in power generation, marine propulsion, and heavy mining environments.

The 10R-1278 injector is fully interchangeable with part numbers 238-1498, 10R-1277, 10R-1280, and 10R-1281, providing flexible sourcing for fleet operators and aftermarket distributors servicing 3512B-powered equipment. Its corrosion-resistant surface treatment and robust internal components are designed to withstand thousands of operating hours under demanding load conditions, reducing unscheduled downtime and extending service intervals. Stable fuel delivery characteristics help maintain optimal combustion efficiency, supporting compliance with emissions requirements in regulated markets.

Installation is straightforward as a direct OEM replacement, and the injector is backed by global service support for operators in power generation facilities, marine vessels, oilfield operations, mining sites, and critical infrastructure projects. Routine maintenance at recommended 2000-hour and 4000-hour intervals — including fuel filter inspection and injector mounting checks — helps preserve spray pattern integrity and consistent engine performance. The 10R-1278 stands as a reliable, specification-matched solution for maintaining the reliability and productivity of 3512B engines worldwide.