This genuine McCormick 6628296A1 alternator is a 12-volt, 120-amp unit designed to provide reliable electrical power for a range of McCormick agricultural machinery. It ensures optimal charging performance for your tractor's electrical system, supporting essential functions and extending battery life. This OEM replacement part is compatible with various McCormick X-series tractor models, including X4.20, X4.30, X4.40, X4.50, X5.35, X5.45, X5.55, X6.45, X6.55, X6.60, X6.70, X7.440, X7.450, X7.460, X7.650, X7.660, X7.670, X7.680, X8.660, X8.670, and X8.680.