This service and repair manual covers McCormick International Farmall tractors, including the Cub, 140, 240, and 340 models. These tractors, produced during the mid-20th century, represent a significant era in agricultural mechanization, building on the legacy of the pioneering Cub utility tractor with enhanced power and features. McCormick International is recognized for its robust and reliable agricultural machinery. This manual provides comprehensive coverage designed to assist owners, mechanics, and restoration enthusiasts in maintaining and repairing these iconic machines. This manual offers in-depth, professional-quality guidance across all major vehicle systems. It details procedures for engine overhaul, transmission and drivetrain servicing, hydraulic and power systems, steering, brakes, and front axles. The scope includes routine maintenance schedules, tune-up procedures, troubleshooting guides for common issues, and component rebuilds. Essential technical specifications, fluid recommendations, torque values, and clear wiring diagrams are also provided. The manual's step-by-step instructions, supported by numerous pictures and illustrations, are designed to make repairs accessible for users of all skill levels, ensuring the full operational capability and longevity of your tractor.