This workshop service manual covers the David Brown 1690 Tractor, a robust agricultural machine known for its reliability and suitability for heavy farm tasks. Produced primarily in the late 1970s and early 1980s, the 1690 represents a significant part of David Brown's heritage in manufacturing dependable farm machinery. This manual aims to provide comprehensive information to ensure owners and technicians can maintain and repair this tractor effectively, helping users maximize its value through informed servicing. The purpose of this manual is to offer detailed guidance on the repair and overhaul of the David Brown 1690 Tractor. It covers a wide array of systems, including the engine, transmission, fuel, electrical, hydraulics, braking, cooling, exhaust, bodywork, steering, axles, power take-off, and operator station. Included are procedures for routine maintenance, tune-ups, troubleshooting common issues, disassembly, assembly, and installation. Technical specifications, information on special tools, and safety guidelines with clear WARNING, CAUTION, and NOTE indicators are also provided, ensuring a thorough understanding for mechanical technicians familiar with such equipment.