This V-belt transmits drive torque from the engine to the corn header's gathering and snapping-roll systems. It sits in the primary drive path between the main gearbox output and the header input shaft. A worn or slipping belt reduces header speed, causing uneven crop intake and increased stalk damage at the rolls. The belt is constructed by Gates to match the original cross-section and length, preserving the tension and wrap angle that the tensioner and pulleys are designed for. On replacement, verify the belt rides flush in all pulley grooves and adjust tension to the manufacturer's specification.