Caterpillar 241-3400 Fuel Injector Assembly

The Caterpillar 241-3400 is a Hydraulic Electronic Unit Injector (HEUI) designed for Caterpillar C7 ACERT diesel engines. It operates using high-pressure engine oil to actuate the injection plunger, delivering precise fuel quantity and timing controlled by the engine ECM. This injector assembly includes the solenoid, nozzle, and internal hydraulic components calibrated to Caterpillar specifications. It replaces OEM part numbers 241-3400, 2413400, and remanufactured core 10R-4763. The injector features a multi-hole nozzle spray pattern optimized for the C7 combustion chamber geometry. Applications include Caterpillar 320D, 324D, 325D, 329D hydraulic excavators, C7 on-highway truck engines, and various industrial power units equipped with the C7 ACERT platform. Installation requires HEUI-specific tooling and torque procedures. Injector calibration codes must be programmed into the ECM upon replacement.