The International Harvester Hydro 100 Tractor represents a significant piece of agricultural machinery, known for its robust engineering and reliable performance. As a product of International Harvester, a brand with a rich legacy in agricultural equipment, the Hydro 100 embodies advancements in tractor technology, particularly its hydrostatic transmission system. This model is designed for demanding tasks, offering a blend of power and operational efficiency suitable for various farming and industrial applications. Its construction prioritizes durability and longevity, making it a valuable asset for operators seeking dependable performance in challenging environments. This comprehensive Workshop Service Manual provides in-depth guidance for the International Harvester Hydro 100 Tractor. Covering a wide array of essential topics, it details repair, maintenance, adjustments, troubleshooting, and component removal and installation procedures. The manual offers extensive coverage of key systems including the engine, hydrostatic transmission, hydraulic system, electrical system, cooling system, fuel system, steering, braking, chassis, and operator controls. With detailed step-by-step instructions, numerous pictorial diagrams, and critical specifications, this manual is an indispensable resource for both professional mechanics and DIY enthusiasts aiming to maintain the Hydro 100 Tractor in optimal working condition.