This comprehensive International Harvester Shop Service Manual provides detailed instructions for servicing and repairing a range of farm tractors, including the Hydro 100, Hydro 186, and models 1466, 1468, 1486, 1566, 1568, and 1586. Whether you're a seasoned professional technician or a first-time owner, this easy-to-understand manual will guide you through every procedure with clarity and precision. From essential maintenance tasks to complex repairs, this manual covers all aspects of your tractor, including: brakes, cab, clutch, cooling system, diesel fuel system, diesel turbocharger, differential, electrical system, engine, final drive, front system, hydraulic system, hydrostatic drive, multiple control valve, power steering system, power take-off, service data, torque amplifier, transmission brake, transmission range, and transmission speed. This manual is your ultimate resource for keeping your tractor in peak condition, ensuring optimal performance and extending its lifespan. Regular preventative maintenance, as outlined in this manual, will save you time and money by minimizing the risk of premature failures and unnecessary repairs.

The IH Hydro 100-Hydro 186 and 1466-1468-1486-1566-1568-1586 series of farm tractors, manufactured by International Harvester, represented a significant step forward in agricultural technology during the 1960s and 70s. These tractors were renowned for their innovative hydrostatic transmission system, offering operators unparalleled maneuverability and ease of use. The Hydro series, ranging in horsepower from 100 to 186, was designed to tackle a wide array of tasks, from light-duty chores to heavy-duty plowing and cultivating. The 1400 series, with its larger horsepower range, was particularly well-suited for demanding agricultural applications. These tractors featured robust construction, with durable engines, heavy-duty axles, and robust hydraulic systems, ensuring long-lasting performance even in challenging conditions. Their versatility and reliability made them a popular choice among farmers and ranchers across the globe. The IH Hydro series offered a number of distinct advantages over conventional gear-driven tractors. The hydrostatic transmission system allowed for seamless speed control, enabling operators to precisely match the tractor's speed to the demands of the task at hand. The system's smooth operation and lack of gear changes provided a more comfortable ride and reduced operator fatigue. Additionally, the hydrostatic transmission allowed for effortless maneuverability, making it ideal for tight spaces and complex tasks. These tractors also benefited from advancements in hydraulic systems, providing powerful lifting capacity for implements and enhanced control over various functions. With their innovative features and rugged construction, the IH Hydro 100-Hydro 186 and 1466-1468-1486-1566-1568-1586 series of farm tractors revolutionized agricultural practices and continue to be highly sought-after by vintage tractor enthusiasts and collectors today.