This workshop service manual covers the Fiat 100-90 Series Tractor, a robust agricultural machine known for its reliability and performance. Building on Fiat's extensive heritage in tractor manufacturing, the 90 Series represents an evolution in design and capability, likely produced during the late 1980s and 1990s. These tractors, typically powered by a diesel engine producing around 100 horsepower, are engineered for demanding agricultural tasks. Their design emphasizes practicality and durability, making them a valuable asset for mechanics and DIY individuals alike. This comprehensive 377-page English-language manual provides detailed, step-by-step procedures for service, repair, and maintenance. It covers all major systems, including the engine, transmission, hydraulics, electrical, powertrain, braking, steering, cooling, fuel, and body/chassis. The manual includes routine maintenance, troubleshooting guides, component removal and installation, disassembly and assembly instructions, adjustments, and reconditioning procedures. With clear explanations, pictorial diagrams, exploded views, special tool references, torque specifications, wear limits, and diagnostic information, this manual is an essential resource for ensuring the optimal performance and longevity of your Fiat 100-90 Series Tractor.