The International Harvester 766 Tractor, produced between 1971 and 1976, represents a significant part of the company's legacy in agricultural machinery. Known for its robust engineering and reliability, this mid-range utility tractor was designed to meet the demanding needs of farming operations. It offered enhanced features and power for its time, succeeding earlier models and embodying International Harvester's commitment to producing dependable equipment. The 766 was available with various engine options, including naturally aspirated and turbocharged diesel engines, and offered both a manual transmission and an optional Power Shift transmission, making it a versatile workhorse. This comprehensive service and repair manual provides in-depth information for the International Harvester 766 Tractor. It covers a wide array of systems, including detailed procedures for engine, transmission, brake, electrical, suspension, steering, cooling, fuel injection, chassis, axle, hydraulic, and power take-off systems. The manual includes step-by-step instructions for general maintenance, periodic lubrication, disassembly, reassembly, and complete rebuilds, alongside essential troubleshooting guides and diagnostic procedures for common issues. Its extensive coverage makes it an indispensable resource for owners, operators, and technicians aiming to maintain, repair, and optimize the performance of their 766 Tractor.