This comprehensive workshop service repair manual covers McCormick International Farmall Cub, 140, 240, and 340 tractors. These iconic machines, produced from the late 1940s through the late 1970s, are renowned for their robust engineering and enduring reliability, making them a staple on farms and for various agricultural tasks. The Farmall Cub, in particular, set a standard for compact, affordable tractors, with subsequent models like the 140, 240, and 340 offering enhanced capabilities and power. This manual is designed to assist owners, mechanics, and restoration enthusiasts in maintaining these historically significant tractors. The purpose of this manual is to provide detailed, A-Z service and repair procedures for all aspects of the McCormick Farmall tractors. It encompasses engine overhaul, transmission and drivetrain maintenance, chassis and steering system repairs, electrical system diagnostics, and body and frame work. Included are comprehensive maintenance schedules, step-by-step repair instructions, troubleshooting guides for common and uncommon issues, and specific adjustment procedures. Technical specifications, wiring diagrams, and special tool requirements are also detailed, empowering users to perform all necessary maintenance and repairs to ensure the longevity and optimal performance of their McCormick International tractors.