Cummins 4307517-20 Fuel Injector Assembly

The 4307517-20 is a Celect electronic unit injector (EUI) designed for Cummins M11, ISM11, and QSM11 heavy-duty diesel engines. It utilizes a solenoid-actuated mechanism controlled by the engine control module (ECM) to deliver precise fuel metering and injection timing. The injector body is constructed from high-strength alloy steel to withstand extreme combustion pressures and cyclic loading. The nozzle assembly features multi-hole spray pattern geometry optimized for the specific combustion bowl design of the M11 platform. This assembly includes the injector body, solenoid valve, nozzle, and internal wear components (plunger, barrel, check valve). It is calibrated to OEM flow specifications (Cummins Calibration Code required for installation). Compatible with Cummins Celect and Celect Plus fuel systems. Supersedes part numbers 3087557, 4307516, and 4061851. Requires torque specification adherence during installation to prevent fuel leakage and ensure sealing integrity.