This workshop service and repair manual covers Zetor 8011, 8045, 12011, and 12045 tractor models. These robust agricultural machines, originating from a manufacturer with a long heritage in producing durable equipment, were likely produced from the late 1970s through the early 1990s. They are known for their straightforward design and reliability, making them suitable for medium to heavy-duty agricultural tasks. Key features include powerful diesel engines, synchronized gearboxes, optional torque multipliers for enhanced performance, and a robust chassis designed for agricultural implements. The manual details coverage of engine systems, drivetrain, chassis, electrical systems, operator station, and auxiliary systems, providing comprehensive information for maintaining these dependable tractors. The purpose of this comprehensive manual is to serve as an all-in-one resource for owners and service technicians. It provides detailed, step-by-step instructions, supported by high-quality exploded diagrams, for a wide range of maintenance and repair procedures. Covered areas include scheduled maintenance, fluid and filter changes, component disassembly and reassembly, troubleshooting guides, and detailed technical specifications such as torque values and clearances. By offering in-depth knowledge on everything from routine servicing to major overhauls, this manual empowers users to perform necessary work efficiently, leading to cost savings and extended vehicle lifespan. The English-language format ensures accessibility across various devices and allows for easy searching and printing.