The John Deere AXE23546 is a genuine OEM engine auxiliary drive belt tensioner, crucial for maintaining optimal tension on the auxiliary drive belt. This component ensures efficient operation and prevents slippage of engine accessories. It is compatible with a wide range of John Deere S-Series combines including S760, S770, S780, S785, S790, and various 8R, 8RX, 9R, 9RT, 9RX series tractors, including models 8R 310, 8R 340, 8R 370, 8R 410, 8RX 310, 8RX 340, 8RX 370, 8RX 410, 9R 440, 9R 490, 9R 540, 9R 590, 9R 640, 9RT 470, 9RT 520, 9RT 570, 9RT 620, 9RX 470, 9RX 520, 9RX 570, 9RX 620. Weighing approximately 1.10 kg, this tensioner is built to John Deere's rigorous standards for durability and performance.