This workshop service repair manual covers the Zetor 4712, 4718, 5711, 5718, 5745, 5748, 6711, 6718, 6745, and 6748 tractor models, likely produced during the 1970s and 1980s. These robust agricultural machines, originating from the Czech Republic, are known for their reliability and functionality in general farming applications. Designed with a focus on durability, they feature Zetor diesel engines and constant mesh transmissions, offering a practical balance of power and versatility. The engineering quality of these tractors ensures a long operational lifespan when properly maintained. This comprehensive manual provides official factory service information essential for the maintenance and repair of your Zetor tractor. It includes detailed procedures for all major systems, such as the engine, transmission, hydraulic system, brakes, and electrical system, along with specific guidance on components like the clutch, differential lock, and power take-off. The manual is organized for clarity, featuring step-by-step instructions, troubleshooting diagnostics, and disassembly/reassembly guides, all supported by hundreds of illustrations. This resource is invaluable for do-it-yourself owners, farm mechanics, and Zetor service centers aiming to preserve the performance and extend the service life of these dependable tractors.