The International Harvester 826 tractor, produced from 1969 to 1971, represents a robust and reliable workhorse from a significant era of agricultural machinery. Known for its sturdy construction and versatility, the 826 was designed to handle demanding agricultural applications, offering substantial drawbar pull and power, typically in the 70-90 HP range depending on its diesel or gasoline engine configuration. Its engineering reflects the quality and durability that International Harvester was known for, making it a popular and enduring model. This tractor is recognized for its ability to perform heavy tillage and hauling tasks, embodying the practical and powerful spirit of its manufacturer. This factory service repair manual provides comprehensive, factory-level detail for all styles of the IH International Harvester 826 tractor. It covers every aspect of maintenance, troubleshooting, repair, rebuilding, refurbishing, and restoration, offering step-by-step procedures, detailed diagrams, and essential specifications. The manual is designed to empower owners, technicians, and enthusiasts with the knowledge to service their tractor effectively, mirroring the information available to professional mechanics. By following its guidance, users can maintain the integrity and performance of their 826, ensuring its longevity and operational efficiency.