The International Harvester 826 Tractor, produced from approximately 1969 to 1971, represents a significant piece of agricultural machinery from a historically important American manufacturer. As part of the esteemed '86 Series', this tractor was known for its robust power, versatility, and advanced features for its era, often equipped with a diesel engine and available with a Power Shift or manual transmission. Its design focused on operator efficiency and reliable performance for demanding farm and industrial tasks. The 826 Tractor embodies the engineering quality and durability characteristic of International Harvester's commitment to agricultural innovation. This comprehensive service repair manual provides essential information for the maintenance and repair of the International Harvester 826 Tractor. It covers a wide range of systems, including detailed procedures for engine overhaul, fuel injection, cooling, transmission, brakes, electrical systems, hydraulics, and PTO. The manual is designed for professional technicians and experienced mechanics, offering in-depth guidance on diagnostics, troubleshooting, disassembly, reassembly, and refurbishment. By following the step-by-step instructions and consulting the technical specifications, users can effectively maintain their tractor, ensuring optimal performance and longevity.