This workshop service repair manual covers the Case International 235, 235H, 245, 255, 265, and 275 Tractor models. These tractors, produced by Case IH, represent robust agricultural machinery designed for a variety of tasks. While specific production years are not precisely detailed, these models likely fall within the 1970s to 1990s era, reflecting a period of significant development in utility tractor technology. The engineering quality and reliability inherent in Case International equipment are supported by comprehensive documentation that allows for in-depth understanding and maintenance. This manual provides factory-level repair and overhaul procedures for all major systems, including the engine, diesel fuel system, cooling system, clutch, transmission (with specific coverage for various types like hydrostatic, sliding gear, constant mesh, and synchromesh), differential, final drive, front axle systems, hydraulic lift, power take-off, and steering systems. It includes detailed disassembly and assembly guides, diagnostic and troubleshooting steps, and essential technical specifications, all enhanced by real photo illustrations, diagrams, and schematics. This comprehensive resource is designed to assist owners, technicians, and mechanics in maintaining and repairing these tractors efficiently, ensuring optimal performance and longevity.