Cummins 4088428 4062569 Fuel Injector Assembly

This fuel injector assembly is engineered for Cummins heavy-duty diesel engines utilizing High Pressure Injection (HPI) and Modular Common Rail Systems (MCRS). It features a solenoid-actuated nozzle design calibrated for specific engine emission tiers and power ratings. The component undergoes rigorous flow testing and calibration to meet OEM performance standards for injection pressure, spray pattern, and seat leakage. Primary application targets the Hitachi EH4000AC-3 rigid frame mining haul truck powered by the Cummins QSK60 engine. Cross-references include superseded part numbers 4010346 and 4088723, and associated repair kit components 4928260 and 4954434. The injector body is constructed from high-strength alloy steel with hardened nozzle needle and seat surfaces to withstand extreme cylinder pressures and fuel contamination resistance.