The Case IH 5120 Tractor, produced primarily in the 1990s, represents a robust and reliable generation of agricultural machinery. Known for its durable construction and strong performance, this tractor is designed to meet the demanding needs of farm operations. The 5100 series, to which the 5120 belongs, is recognized for its significant engineering contributions to the agricultural sector, offering a blend of power and efficiency. This manual covers a comprehensive range of service and repair information for this model, empowering owners and operators with the knowledge to maintain their equipment effectively. This service and repair manual provides extensive coverage for the Case IH 5120 Tractor, encompassing all essential systems. It details general maintenance, periodic lubrication, engine service including fuel injection and control systems, transmission repairs, and brake system maintenance. Furthermore, the manual includes information on the electrical system with wiring diagrams, suspension, steering, cooling, and emission systems, as well as chassis and body work. With advanced diagnostic capabilities and procedures for repair and rebuild, this manual is an indispensable resource for tractor owners, independent mechanics, and farm operators aiming for self-sufficiency and cost savings on repairs.