The International Harvester B-250 and B-275 represent a significant chapter in agricultural machinery, produced primarily in the late 1950s and early 1960s. These diesel-powered utility tractors, typically featuring manual gearboxes and PTO capabilities, were engineered for reliability and robust performance, making them a popular choice for a wide range of agricultural tasks. Their design emphasized practicality and durability, contributing to International Harvester's strong reputation in the farming community. The B-series tractors were known for their solid construction and straightforward operation, serving as dependable workhorses for generations of farmers and agricultural workshops. This comprehensive Workshop Repair Service Manual provides in-depth technical information for all B-250 and B-275 models. It covers essential maintenance procedures, from routine service intervals and fluid specifications to advanced troubleshooting for common issues like clutch wear and hydraulic system performance. Detailed instructions for engine, transmission, fuel, cooling, brake, and electrical systems, along with numerous diagrams and illustrations, are included to guide owners and technicians through disassembly, repair, and reassembly. The manual's professional-level detail ensures accurate diagnostics and repairs, enabling users to maintain their tractors effectively and potentially save on labor costs.