The Fiat Trattori 640 and 640DT represent robust agricultural machinery produced primarily during the 1970s and 1980s. These tractors, known for their reliability and solid construction, were designed for demanding agricultural tasks. The 640DT variant offers the added benefit of 4-wheel drive, enhancing traction and versatility in various field conditions. With diesel engines typically ranging from 50-65 horsepower, these models provide dependable power for a wide array of farming operations. Their straightforward mechanical design emphasizes functionality and ease of maintenance, making them a valuable asset for any agricultural enterprise. This comprehensive Service Repair Manual provides detailed guidance for the Fiat Trattori 640 and 640DT. It covers essential areas including general information, engine, fuel system, cooling system, electrical system, chassis, and hydraulic systems. Within its pages, you will find procedures for periodic maintenance, component rebuilds, diagnostic troubleshooting, and specific adjustment procedures. Safety precautions are also thoroughly outlined. With hundreds of photos and illustrations, this manual is an indispensable resource for owners and technicians alike, enabling efficient maintenance, repair, and restoration to ensure the continued performance and longevity of these workhorse tractors.