This service repair manual covers the International Harvester B275, a robust utility tractor produced from the late 1950s into the early 1960s. Known for its reliability and work ethic, the B275 features a direct injection diesel engine, a constant mesh gearbox with multiple speed options, and a durable construction typical of International Harvester's agricultural machinery heritage. Its engineering quality and straightforward design made it a valuable asset for agricultural and other heavy-duty applications, ensuring dependable performance through demanding tasks. This comprehensive manual provides detailed service and repair information for the International Harvester B275. It covers all major systems, including the engine, transmission, hydraulics, electrical components, front and rear axles, and braking system. Included are routine maintenance procedures, diagnostic guides, step-by-step repair instructions, overhaul procedures for the engine and transmission, and essential technical specifications such as torque values and fluid capacities. This resource is designed to assist professional technicians, agricultural mechanics, and tractor enthusiasts in maintaining and repairing the vehicle to ensure optimal performance and longevity.