The David Brown 1690 tractor, produced from the late 1970s into the 1980s, represents a robust and reliable piece of agricultural machinery known for its durability and workhorse capabilities. Manufactured primarily in the United Kingdom, this model is a testament to David Brown's heritage in producing dependable tractors for demanding farm work. While specific engine horsepower and dimensional specifications are not detailed here, the 1690 is understood to be a capable machine within its class, likely featuring a diesel engine and a manual transmission designed for practical agricultural applications. This comprehensive service and repair manual is designed to assist farm owners, independent mechanics, and DIY enthusiasts in maintaining and repairing their David Brown 1690 tractor. It covers a wide array of critical systems, including general maintenance, troubleshooting, engine and transmission service, brake systems, electrical systems with wiring diagrams, suspension, steering, cooling, fuel injection, and chassis components. The manual provides detailed procedures for disassembly, reassembly, and repair, alongside guidance on lubrication and fluid specifications, empowering users with the technical knowledge to ensure the longevity and optimal performance of their tractor.