Caterpillar original 111-3718 Common Rail Fuel Injector Replacement for OEM 4P9075, 4P9076, 4P9077 for CAT 3508 3512 3516 Engine Excavator Application original new injector

The CAT (Caterpillar) 111-3718 Fuel Injector Assembly is a brand-new, OEM-equivalent heavy-duty diesel injection component purpose-built for CAT 3500 series diesel engines, with confirmed fitment across 3508, 3508B, 3512, 3512A, 3512B, 3516, 3516A and 3516B engine platforms. Manufactured to strict original equipment manufacturer specifications, it serves as a direct replacement matching OEM fit and function for original CAT injectors, supporting consistent operation of high-power diesel equipment across industrial use cases.

Operating within the engine’s high-pressure direct injection fuel system, the 111-3718 injector uses a precision needle valve to deliver accurately metered, ultra-fine atomized fuel to the combustion chamber, enabling thorough, efficient combustion. This design delivers measurable operational benefits including reduced fuel consumption, higher power and torque output, lower exhaust smoke and emissions, improved cold-start performance, and stable fuel delivery across variable load conditions for continuous-duty workloads.

Every 111-3718 injector is factory flow-tested to verify calibration accuracy, with corrosion-resistant alloy steel construction and a precision-engineered nozzle system to deliver industrial-grade reliability and extended service life. It is validated for use in mining, marine, power generation, construction and oil & gas equipment, and is backed by a 12-month warranty, offering global B2B buyers a balanced combination of OEM-level quality, dependable performance and cost-effective replacement value.