Cummins 4969126 Fuel Injector Supply Tube

The Cummins 4969126 fuel injector supply tube is a critical high-pressure component within the Modular Common Rail System (MCRS) of the QSK60 engine. It channels pressurized fuel from the rail to the individual injector inlet, maintaining sealing integrity under extreme operating pressures. Constructed from high-strength alloy steel with precision-formed flared or O-ring seal connections, this tube withstands peak rail pressures up to 1,600 bar (23,200 psi). It is engineered for the V16 60.2L displacement QSK60 platform utilized in mining haul trucks, large excavators, and stationary power generation units. Dimensional accuracy and surface finish are controlled to prevent leakage and ensure consistent fuel metering for emissions compliance and combustion efficiency.