This official factory service repair manual covers the Case IH 385, 485, and 585 tractor models. These versatile utility tractors, likely introduced in the 1980s or early 1990s, are built on a heritage of durability and performance from Case IH, a long-standing manufacturer of agricultural equipment. Designed for a wide range of agricultural applications, these models are known for their robust construction and reliable operation. This manual provides comprehensive information to ensure these tractors continue to perform optimally throughout their service life. This manual serves as an indispensable resource for owners, technicians, and repair shops. It contains detailed procedures for routine maintenance, advanced troubleshooting, and complete overhauls of all major systems, including the engine, lubrication, cooling, fuel, clutch, transmission, brakes, steering, hydraulic, and electrical systems. With hundreds of pages of factory-level technical detail, including step-by-step instructions, hundreds of illustrations, and detailed diagrams and specifications, this manual empowers users to perform maintenance and repairs efficiently, saving significant costs on labor and ensuring the longevity of their Case IH tractors.