The International Harvester (IH) Cub Cadet 123, produced around 1965-1966, represents a robust and versatile tractor from a lineage known for its exceptional build quality and durability. Designed for a range of agricultural and property maintenance tasks, this model embodies the engineering prowess of International Harvester, a significant name in industrial and agricultural equipment. Its compact yet sturdy construction, powered by a reliable Kohler engine and featuring a hydrostatic drive transmission, made it a popular choice for homeowners and small farms alike, solidifying its reputation as a classic piece of machinery. This comprehensive factory service repair manual provides essential information for owners, mechanics, and technicians to maintain and repair the IH Cub Cadet 123 tractor. It covers all critical systems, including the engine, transmission, electrical, hydraulic, cooling, fuel, steering, braking, and drive line. Detailed procedures for overhaul, repair, adjustment, and troubleshooting are included, alongside essential technical specifications, torque values, and wiring diagrams. The manual is designed to facilitate efficient servicing, from routine maintenance to complete rebuilds, ensuring the longevity and optimal performance of your tractor.