This comprehensive workshop manual provides detailed instructions and technical specifications for a range of David Brown agricultural tractors, specifically the 770, 780, 880 (starting with serial number 52101), 990 (starting with serial number 467871), 1200, 3800, and 4600 models. Originally intended for distributors and dealers, this manual equips users with the necessary information to perform service and repair tasks themselves, potentially saving significant costs associated with professional mechanics. Its comprehensive coverage includes essential tractor components and systems such as the belt pulley, brake and clutch systems, carburetor (for petrol models), single and dual disc clutches, cooling system, diesel fuel system, differential, electrical system, engine, final drive assembly, front axle, governor (non-diesel), hydraulic lift system, ignition system, power steering, power take-off, rear axle, steering gear, and transmission.

The David Brown 770, 780, 880, 990, 1200, 3800, and 4600 were a range of agricultural tractors produced by the British manufacturer David Brown Tractors. These models were popular for their durability, versatility, and performance, becoming staples on farms across the globe. The 780, 880, 990, and 1200 models were particularly notable for their robust construction, powerful engines, and advanced hydraulic systems. The 780, for instance, was known for its 74 horsepower engine, offering a balanced blend of power and economy. The 880, on the other hand, boasted an 88 horsepower engine, providing ample power for heavier tasks like plowing and cultivating. These tractors were designed with a focus on ease of maintenance, incorporating features that made servicing and repair accessible to farmers and mechanics alike. The workshop manual for these tractors, as described, was intended for use by distributors and dealers, providing comprehensive details on all aspects of the tractor's mechanics. This manual served as a valuable resource for technicians, helping them diagnose and troubleshoot problems, conduct routine maintenance, and perform complex repairs. By offering access to this information, the manual empowered users to handle a wide range of tasks themselves, potentially saving them significant costs associated with professional mechanic fees. The manual's focus on covering systems like the engine, transmission, hydraulics, and electrical system ensured that users had the necessary information to tackle a variety of repairs and maintenance procedures, ultimately leading to a more efficient and cost-effective operation of their David Brown tractor.