This manual covers the Valmet/Valtra M and T series tractors, including models M120, M130, M150, T120, T130, T140, T150, T160, T170, T180, and T190. These heavy-duty agricultural tractors, manufactured by Valtra, a Finnish company now part of AGCO Corporation, are renowned for their robustness and reliability in demanding agricultural environments. The M and T series are designed for versatility across a wide range of farming applications, built with engineering quality to ensure dependable performance. This service repair manual provides comprehensive information to maintain and repair these powerful machines. The purpose of this extensive service repair manual is to provide owners, operators, and maintenance technicians with the necessary information for efficient upkeep and repair of Valmet/Valtra M and T series tractors. It covers detailed maintenance and repair procedures for all major systems, including the engine, transmission, hydraulics, electrical system, braking system, steering, cooling system, fuel system, power take-off, front axle, chassis, and body. The manual includes step-by-step instructions, diagnostic guides, troubleshooting procedures, and technical specifications, all supported by high-quality diagrams and exploded views, making it a practical tool for minimizing downtime and reducing repair costs.