The International Harvester B414 Tractor, produced approximately from 1961 to 1965, is a robust and versatile diesel-powered agricultural machine. As part of the esteemed British-built B-series line, the B414 is renowned for its reliability and utility, offering approximately 40-45 PTO horsepower from its 2.38 L (144 cu in) four-cylinder diesel engine. Designed with a manual transmission featuring multiple gears for efficient operation, this tractor was manufactured in the United Kingdom and has earned a reputation for solid performance in various farming applications. Its engineering quality and enduring design have made it a valued piece of equipment for agricultural tasks. This comprehensive full service repair manual provides detailed information for the maintenance, repair, rebuilding, refurbishing, and restoration of the International Harvester B414 Tractor. It covers all major systems, including the engine, transmission, electrical, fuel, cooling, lubrication, hydraulic, brake, steering, clutch, and power take-off systems. The manual includes routine maintenance schedules, fluid specifications, troubleshooting guides, step-by-step repair procedures, and detailed electrical wiring diagrams, all presented with extensive illustrations and drawings. This resource is intended for professional technicians and skilled mechanics, equipping them with the necessary knowledge to ensure the optimal performance and longevity of the B414.