This factory service and repair manual covers the International Harvester (IH) Cub Cadet 73 tractor, produced in the mid-to-late 1960s. The Cub Cadet line, introduced in 1961, represented International Harvester's entry into the homeowner and light-duty agricultural market, building on the brand's long heritage of durable and reliable agricultural machinery. The Cub Cadet 73 is characterized by its robust construction and focus on mechanical operation, designed for consistent power delivery for tasks such as operating a power take-off (PTO) and maintaining ground speed. This manual is a vital resource for owners and mechanics aiming to maintain and repair this dependable tractor. The purpose of this manual is to provide comprehensive factory-level repair and diagnostic information for the International IH Cub Cadet Tractor 73. It details procedures for routine maintenance, engine overhaul, and the repair of all major systems, including the fuel, ignition, cooling, lubrication, transmission, hydraulics, steering, and braking systems. Furthermore, it covers electrical system troubleshooting with wiring diagrams, chassis and frame repairs, and bodywork. This English-language manual is presented in a clear, organized format, enabling owners and technicians to perform maintenance, diagnose issues, and execute component rebuilds, ultimately facilitating cost savings and ensuring the longevity of the tractor.