This workshop service repair manual covers the Fiat 680 DT tractor, a robust and reliable piece of equipment likely produced in the mid to late 20th century. Engineered by Fiat Trattori, this diesel-powered tractor is designed for demanding agricultural and industrial tasks. Its construction emphasizes durability and performance, with a focus on proprietary components and special product aspects that contribute to its unique capabilities. This manual aims to provide comprehensive information for maintaining and repairing this versatile machine. The purpose of this manual is to provide detailed instructions for the full service, repair, and overhaul of the Fiat 680 DT. It encompasses a wide range of systems, including the engine, transmission, fuel, ignition, lubrication, exhaust, and electrical systems, as well as bodywork. Owners and technicians will find in-depth coverage of routine maintenance, diagnostic procedures, troubleshooting, assembly and disassembly, tune-ups, and the use of special tools. With a strong emphasis on safety precautions and the correct use of equipment like torque wrenches, this manual empowers users to perform professional-level maintenance and repairs, ensuring the longevity and optimal performance of their Fiat 680 DT tractor.