Cummins 5308773 Fuel Injector Assembly

The Cummins 5308773 is a high-pressure common rail fuel injector designed for the Cummins ISF2.8 and ISF3.8 engine platforms. It features solenoid-actuated injection control with multi-hole nozzle geometry optimized for combustion efficiency and particulate reduction. The injector body is manufactured from high-strength alloy steel with precision-machined control valves and needle assemblies to withstand peak rail pressures exceeding 1800 bar. This unit replaces Cummins part numbers 5292570 and FH21095, and serves as the OEM service replacement for factory-installed injectors on Foton Auman and other commercial vehicles equipped with ISF series engines. Each injector undergoes factory calibration and flow testing to ensure consistent injection quantity and timing across all cylinders. Installation requires high-pressure fuel line torque specifications and ECM calibration verification using Cummins INSITE software.