The Fiat 70-90 is a robust agricultural tractor, part of the Fiat 90 Series introduced in the mid-1980s and produced into the early 1990s. Designed for reliable performance and versatility in demanding agricultural applications, this diesel-powered machine typically features 4- or 6-cylinder engines producing around 70-80 PTO horsepower. Its engineering reflects Fiat's commitment to durability and functionality, competing with other major tractor manufacturers of the era. The 70-90 is equipped with a manual synchromesh transmission, often with options for creeper gears and various PTO speeds, making it a capable workhorse for a range of farming tasks. This comprehensive Service Repair Manual provides essential technical documentation for the Fiat 70-90 tractor. It covers a wide array of systems, including General Information, Periodic Maintenance, Engine, Fuel System, Cooling System, Electrical System, and Chassis. Detailed procedures for maintenance, repair, and troubleshooting are included, along with specific information on engine overhaul, fuel injection systems, cooling system service, electrical diagnostics, and chassis components. The manual is designed to assist owners, mechanics, and technicians in effectively maintaining and repairing the vehicle, ensuring its continued performance and longevity.