The Zetor Unified Range 3 tractors, encompassing models 10520, 9520, 8520, and 7520, represent a significant evolution of Zetor's established designs, known for their robustness and reliability. Originating from a Czech manufacturer with a long heritage in agricultural machinery, these tractors combine core principles of durability with modern features. This series offers a range of horsepower, typically from approximately 75 HP to 105 HP, designed for demanding agricultural applications. Their engineering emphasizes ease of maintenance and operational efficiency, making them a practical choice for various farming tasks. This comprehensive Workshop Service Repair Manual provides detailed technical information for the Zetor Unified Range 3 models. It covers all essential systems, including engine, transmission, hydraulics, electrical, braking, steering, power take-off, and chassis. The manual offers step-by-step instructions for routine maintenance, diagnostics, repairs, and overhauls, complete with diagrams and specifications. Its purpose is to empower owners and technicians to maintain, troubleshoot, and repair these tractors effectively, ensuring optimal performance and longevity.