This manual covers the International Harvester (IH) 2706, 2756, 2806, and 2856 series tractors, produced approximately from 1965 to 1969. These robust machines, powered by reliable diesel engines such as the IH D-358, D-414, D-436, and D-466, offered significant horsepower and torque suitable for demanding agricultural tasks. Engineered for durability and operational efficiency, these tractors represented a key evolution in IH's medium-horsepower row-crop line, known for their strong build and practical design, making them essential tools for farm owners and operators. This comprehensive Factory Service Repair Manual provides detailed information for the maintenance, repair, and troubleshooting of your International Harvester tractor. It includes in-depth coverage of engine service, transmission and drivetrain systems, hydraulic operations, and the electrical system, along with chassis components and bodywork. With step-by-step repair procedures, diagnostic guides, technical specifications, and essential safety information, this manual is an indispensable resource for farm owners, mechanics, and technicians seeking to ensure optimal performance, longevity, and reliability of their 27xx/28xx series IH tractors.