The Case IH 385, 485, and 585 series tractors, produced approximately from the mid-to-late 1980s through the early 1990s, represent robust and reliable compact utility tractors designed for a variety of agricultural and property maintenance tasks. These diesel-powered machines are known for their straightforward engineering, emphasizing durability and operational efficiency. While specific engine and transmission configurations may vary, these models typically feature manual gearboxes and a focus on mechanical and hydraulic operation, eschewing modern electronic driver assistance or connectivity for dependable performance in demanding environments. Their construction prioritizes longevity and ease of maintenance, making them a practical choice for owners seeking dependable workhorses. This comprehensive workshop service repair manual provides in-depth guidance for the Case IH 385, 485, and 585 models. It covers a wide array of systems, including complete engine overhaul, cooling, fuel, power train, front axle, clutch, differential lock, electrical system, brakes, and hydraulic system. Detailed procedures for general maintenance, troubleshooting, repair, and specific tasks such as engine rebuilds and hydraulic system repairs are included, supported by hundreds of illustrations and step-by-step instructions. This manual is an essential resource for do-it-yourself owners and experienced mechanics alike, offering the knowledge needed to maintain these tractors in optimal working condition and save on repair costs.