The McCormick 300477A1 is a genuine OEM belt tensioner designed for various McCormick, Case IH, and Landini agricultural tractors. This critical component maintains proper tension on drive belts, preventing slippage and ensuring efficient power transmission. It is compatible with McCormick CX, MC, and MTX series, Case IH MXM and MXU series, and Landini Legend, Powerfarm, and Vision tractors. Weighing approximately 0.34 kg, this tensioner is built to OEM specifications for durability and reliable operation.