The Case IH 87311822 is a genuine OEM alternator, specifically engineered to deliver reliable electrical power for a wide range of Case IH agricultural tractors. This 12-volt, 120-amp alternator ensures optimal charging performance for your machine's electrical system, maintaining battery health and supporting all electrical components. It serves as a direct replacement part, guaranteeing proper fit and function for various models, including the MXM, MXU, Puma, Maxxum, and CVX series tractors.