This workshop repair manual covers the Fiat 90 Series Tractors, specifically the 115-90, 130-90, 140-90, 160-90, and 180-90 models. These tractors, primarily produced during the 1980s and early 1990s, are known for their robustness and reliability in demanding agricultural applications. The 90 Series represented a significant evolution, offering improved performance and ergonomics. This manual provides comprehensive guidance for maintaining and repairing these workhorses, reflecting Fiat's long-standing reputation for dependable heavy-duty agricultural machinery. This 507-page English-language workshop manual is designed to provide detailed repair and maintenance procedures for the Fiat 90 Series Tractors. It covers all major systems, including the engine, fuel system, cooling system, transmission, hydraulic system, PTO, axles, braking, and electrical systems. Included are step-by-step diagnostic and repair procedures, overhaul instructions for major components, adjustment specifications, and essential torque values. This manual serves as an indispensable resource for farm mechanics, agricultural repair shops, and tractor owners aiming to ensure the efficient and accurate upkeep of their equipment.