The International Harvester B414 Tractor, a robust utility tractor introduced in the late 1950s and early 1960s, represents a significant piece of agricultural engineering. Manufactured in both the UK and USA, this model was a popular choice for farm owners and smallholders, valued for its dependability and versatility. Its design, typically featuring a diesel engine around 154 cubic inches and approximately 35-40 PTO horsepower, was built for demanding farm work. The B414 is known for its straightforward mechanical systems, including a constant mesh transmission with typically six forward and two reverse gears, and a reliable hydraulic system. This tractor embodies the practical, workhorse ethos of its era, empowering users with the capability to manage a wide range of agricultural tasks. This comprehensive service repair manual provides essential information for the maintenance and repair of the International Harvester B414 Tractor. It covers all service and repair aspects, detailing procedures for the engine, fuel system, cooling system, lubrication, transmission, hydraulics, steering, brakes, and electrical systems. The manual includes routine maintenance schedules, step-by-step repair instructions, troubleshooting guides, and adjustment procedures for various components. With extensive technical depth, it offers guidance on everything from basic checks to complete overhauls, including critical torque specifications and clearances. This resource is designed to assist owners, mechanics, and technicians in ensuring the operational reliability and longevity of their B414 Tractor.