This manual covers the Fiat 55-66 F Tractor, a robust piece of agricultural machinery from the 66 Series. Produced primarily during the late 1970s through the early 1990s, this tractor is known for its reliable performance and practical design, building on Fiat's extensive heritage in agricultural equipment manufacturing. With an approximate 55 horsepower output, the 55-66 F is engineered for a variety of farming tasks, embodying the quality and durability expected from Fiat Trattori. Its straightforward mechanical and electrical systems ensure dependable operation in demanding environments. This comprehensive factory service repair manual provides detailed information for owners, mechanics, and technicians. It covers all aspects of maintenance, diagnostics, troubleshooting, and repair for the Fiat 55-66 F Tractor. Within its hundreds of pages, you will find in-depth procedures for engine systems, powertrain, drivetrain, electrical systems, and hydraulic lift units. The manual includes step-by-step instructions, technical specifications, wiring diagrams, and guidance on special tools, enabling effective upkeep and repair to maintain the tractor's optimal performance and longevity.