The Case IH Magnum series, including models 250, 280, 310, 340, and 380, along with their Rowtrac variants, represents a pinnacle of agricultural tractor engineering. Designed for high-horsepower applications, these tractors offer robust performance, advanced Continuously Variable Transmission (CVT) technology for optimal efficiency and control, and optional Rowtrac configurations to minimize soil compaction. With a legacy of reliability and innovation, the Magnum series is built to tackle the most demanding farming operations, providing operators with the power and precision needed for large-scale agricultural productivity. This comprehensive Factory Service Repair Workshop Manual provides detailed information for the maintenance, diagnosis, and repair of Case IH Magnum CVT tractors, serial number ZERF08100 and above. It covers all major systems, including the engine, CVT transmission, drivetrain, power take-off, brakes, hydraulics, hitch, steering, wheels and tracks, cab climate control, and electrical systems. The manual includes scheduled maintenance procedures, step-by-step repair instructions, disassembly and assembly guides, component adjustments, and troubleshooting diagnostics, all supported by high-quality diagrams and illustrations, making it an essential resource for owners and technicians.