The David Brown 1390 is a robust tractor model, produced likely in the late 1970s and early 1980s, representing a significant advancement in David Brown's line of agricultural machinery. Known for their reliability and workhorse capabilities, these British-manufactured tractors are engineered for demanding agricultural tasks. The 1390 typically features a diesel engine, often a Perkins, with approximately 70-80 PTO horsepower, delivering substantial low-end torque essential for fieldwork. Its design emphasizes mechanical functionality and durability, making it a dependable choice for owners and operators. This comprehensive Workshop Manual (WSM) / Service Repair Manual provides in-depth guidance for the David Brown 1390 tractor. It covers all aspects of service and repair, including routine maintenance, detailed troubleshooting, and essential technical specifications. The manual is designed to assist tractor owners, mechanics, and agricultural workshops in maintaining the optimal performance and longevity of their 1390. With step-by-step instructions, diagrams, and wiring schematics, this English-language manual enables efficient diagnostics and repairs, empowering users to undertake servicing and save on professional costs.