This manual covers the International Harvester Cub Cadet Series 70 and 100, representing the early generation of these robust utility tractors. Introduced in the early to mid-1960s and manufactured in Louisville, Kentucky, these models are renowned for their durability and versatility, building on International Harvester's strong legacy in agricultural machinery. The Cub Cadet 70, typically around 7-8 HP, and the Cub Cadet 100, offering approximately 10-12 HP, both feature reliable Kohler K-Series engines and a 4-speed manual transmission with a high/low range selector. These tractors were designed for homeowners and small-scale agricultural tasks, embodying a commitment to solid engineering and dependable performance. This comprehensive workshop service repair manual provides detailed guidance for owners, mechanics, and restoration enthusiasts. It covers all models, engines, trim, and transmission types, offering step-by-step instructions for routine maintenance, extensive repairs, and complete overhauls. Key areas include engine service (tune-up, carburetor, ignition), transmission and drivetrain repair, electrical system diagnostics, hydraulic system service (if equipped), steering, brakes, cooling, and fuel systems. The manual also details procedures for disassembly and reassembly, adjustments, and rebuilds for both the engine and transmission, alongside critical technical specifications, torque values, and wiring diagrams, empowering users to maintain and repair their Cub Cadet effectively.