The McCormick 709172A1 Gear is a genuine OEM replacement part designed for various McCormick X-series tractors, including X4.20, X4.30, X4.40, X4.50, X4.60, X5.20, X5.30, X5.40, X5.50, X6.420, X6.430, X6.440, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, X8.680. This essential component ensures proper power transmission within the machinery. It is also compatible with a wide range of Landini and Valpadana tractor models, offering broad applicability for agricultural equipment maintenance.