The John Deere AE27402 Idler is a genuine OEM replacement part designed for various John Deere 9000 series combines including models 9400, 9410, 9450, 9500, 9510, 9550, 9560, 9600, 9610, 9650, 9660, 9750STS, 9760STS, and 9860STS. It also fits the 7760 Cotton Picker. This critical component helps maintain proper belt tension and alignment, contributing to the efficient operation and longevity of your machinery's drive systems. Manufactured to John Deere's rigorous standards, it ensures reliable performance and direct fitment.