This spring is part of the clutch assembly that drives the corn header’s gathering unit. It applies the clamping force needed to engage the drive, transmitting torque from the gearbox output to the rotating components of the header. When the spring loses tension, the clutch slips under load, causing intermittent drive and uneven crop intake. This original part is manufactured to the same free length and spring rate as the original assembly, so the clutch engages at the correct rpm without adjustment.