Cummins 2831356 Injector Fuel Supply Tube

The Cummins 2831356 is a high-pressure fuel injector supply tube designed for Euro 3 compliant 6.7-liter ISB and QSB diesel engines. It serves as a critical component in the fuel delivery system, transferring pressurized fuel from the rail to the injector inlet. This tube replaces superseded part numbers 4899310 and 2830620. It features precision-formed high-strength steel construction with 2 x 12.5 mm inner thread diameters to ensure leak-free sealing under high injection pressures. The component is engineered for durability in heavy-duty cycles typical of commercial trucking and construction machinery applications. Verified fitment includes New Holland TS125A/TS135A and Case MXU125/MXU135 tractors, plus a wide range of Dongfeng, Foton, and construction equipment platforms powered by Cummins ISB/QSB engine families.