The International Harvester 826, produced from approximately 1969 to 1971, represents a robust piece of agricultural machinery known for its strong construction and performance. This tractor, powered by the International Harvester DT-360 turbocharged diesel engine, offered approximately 90 horsepower and featured a 16-speed Power Shift transmission, allowing for on-the-fly gear changes. With an operating weight ranging from 8,500 to 10,000 lbs, the IH 826 was designed for demanding work, building upon the heritage of International Harvester's established line of tractors. Its engineering focused on core mechanical systems, ensuring reliability and efficiency for its intended agricultural applications. This comprehensive workshop service repair manual provides factory-level detail for the International Harvester 826. It covers a wide array of systems, including the engine, lubrication, cooling, fuel, clutch, transmission, rear and front axles, brakes, steering, shocks, bodywork, intake/exhaust, hydraulic, and electrical systems. The manual details routine maintenance, advanced troubleshooting, and step-by-step repair procedures based on complete disassembly, supplemented by hundreds of photos and illustrations. It is designed to guide both experienced mechanics and do-it-yourselfers in maintaining and repairing the tractor, offering numbered instructions, substeps, notes, cautions, and warnings for clarity.