The International Harvester 826 is a robust agricultural tractor produced approximately between 1969 and 1971. Designed as part of the 06 Series, it succeeded earlier models and offered a powerful DT-407 Diesel engine with 6 cylinders and 407 cubic inches of displacement, delivering around 79 PTO horsepower. This tractor was engineered for demanding agricultural tasks, featuring options like a 5-speed or 10-speed powershift transmission, differential hydraulic disc brakes, and a sturdy frame. Its reliable construction and versatile capabilities made it a valuable asset for farm operations during its production era. This Service Repair Manual (WSM) provides comprehensive coverage for the International Harvester 826 tractor, detailing everything from routine maintenance procedures to in-depth repair and overhaul instructions for all major systems. It includes guidance on the engine, fuel, cooling, lubrication, electrical, transmission, hydraulic, steering, and braking systems, along with chassis and bodywork. The manual is designed to empower owners and technicians with the knowledge to perform diagnostics, repairs, and adjustments effectively, ensuring the longevity and optimal performance of the tractor. With step-by-step instructions and included visual aids such as pictures and wiring diagrams, this English-language manual serves as an essential resource for maintaining this classic piece of agricultural machinery.