Caterpillar original 111-3718 Common Rail Fuel Injector 0R2921 Replacement for OEM 4P9077, 7E6408 for CAT 3508 3512 3516 Excavator Loader Engine Parts original new injector

The Caterpillar 111-3718 Fuel Injector Assembly is a precision-engineered, heavy-duty diesel component designed for the CAT 3500 engine platform, covering the 3508, 3508B, 3512, 3512A, 3512B, 3516, 3516A, and 3516B series. Manufactured to OEM-equivalent specifications and supplied brand new, it delivers accurate fuel metering and ultra-fine atomization for stable combustion in continuous-duty operation. Proven applications include diesel generator sets, marine propulsion systems, offshore power units, mining trucks, industrial power stations, construction machinery, and oil & gas equipment.

Operating within the engine's high-pressure direct injection system, the 111-3718 opens its needle valve with precise timing, injecting atomized diesel into the combustion chamber for complete combustion, maximum power, and reduced exhaust smoke. Its precision-engineered nozzle, alloy-steel body, and corrosion-resistant construction withstand high injection pressures, while factory flow-tested calibration ensures consistent performance. Key benefits include improved combustion efficiency, lower fuel consumption, better cold-start behavior, and long service life.

For international buyers, sourcing is simplified by a complete cross-reference database: remanufactured reference 0R-8688, replacement reference 10R-0955, and exchange reference 20R-2055. Every unit is backed by a 12-month warranty and supported by professional installation and maintenance guidance, including seal replacement, clean-fuel practices, and Caterpillar torque specifications. Combining OEM quality, competitive global pricing, and industrial-grade reliability, the CAT 111-3718 injector is a dependable solution for power generation, marine, mining, and oilfield fleets worldwide.