This workshop service repair manual covers the Case IH STX Series, encompassing all models and production years. Engineered for demanding agricultural applications, the STX Series is renowned for its robust construction and powerful performance, featuring a 9-liter diesel engine designed for reliability and efficiency. This manual provides comprehensive documentation for maintaining and repairing these high-performance tractors, ensuring they continue to operate at peak capacity. The purpose of this manual is to serve as an authoritative resource for all aspects of STX Series service. It details step-by-step repair procedures, complete with diagrams, illustrations, and wiring schematics for all major components, including the engine, clutch, transmission, axles, brakes, steering, and electrical systems. Owners, technicians, and mechanics will find extensive technical data, a complete parts list, and information on accessories to facilitate all repairs and enhance operational performance.