The International Harvester Cadet 80, produced from the early to mid-1960s, represents a significant entry in the compact and lawn/garden tractor market. As part of IH's evolving Cadet line, these tractors were designed with practical utility and reliability in mind, drawing on International Harvester's extensive heritage in agricultural machinery. With models such as the 261 and 344, the Cadet 80 typically featured a vertical, 4-stroke gasoline engine of approximately 60 cubic inches, producing around 8-12 horsepower, coupled with a manual transmission offering three forward gears and reverse. Its robust construction and straightforward mechanical design made it a dependable workhorse for various tasks, embodying the engineering quality and value proposition that defined International Harvester products of that era. This Workshop Service Repair Manual provides comprehensive guidance for all aspects of service, repair, and maintenance for the International Harvester Cadet 80. Covering an estimated 200-300 pages, it delves into detailed procedures for engine overhaul, fuel and electrical systems, transmission, drive systems, steering, brakes, hydraulics, and chassis. The manual includes essential maintenance schedules, troubleshooting guides for common issues, step-by-step repair instructions, and detailed technical specifications such as torque values and fluid capacities. Its purpose is to empower owners, mechanics, and restoration enthusiasts to effectively maintain, diagnose, and repair their Cadet 80, ensuring its longevity and optimal performance while offering significant cost savings.