This comprehensive service repair manual provides detailed instructions and diagrams for maintaining and repairing David Brown tractors, specifically models 770, 870, 970, 1070, 1090, 1170, and 1175. The manual covers a wide range of tractor components, ensuring you have the information needed for a variety of repair tasks. You'll find in-depth coverage of the belt pulley system, wheel brakes, clutch adjustments, removal, and overhaul procedures. The manual also covers the cooling system, including the radiator, thermostat, and water pump. For the diesel fuel system, you'll find instructions on bleeding, filter maintenance, injection pump and nozzle troubleshooting, and repair. The manual delves into the differential, covering adjustments, locking mechanisms, overhaul, and removal and reinstallation procedures. The electrical system is comprehensively covered, including alternator and starting motor maintenance. Engine repair instructions cover removal and reinstallation, cylinder head, camshaft, crankshaft, and piston maintenance. The manual includes information on the final drive assembly, front axle, and hydraulic lift system, including adjustments, fluid and filter maintenance, operation, and troubleshooting. Power steering procedures include bleeding, control valve, power cylinder, and pump repair. The manual provides instructions for the power take-off overhaul, removal, and reinstallation, as well as rear axle maintenance. Finally, the steering gear overhaul, removal, and reinstallation, and transmission assembly, removal, reinstallation, and adjustments are thoroughly described.

## The David Brown 770-1175 Series: A Legacy of Power and Innovation The David Brown 770-1175 Series tractors, encompassing models like the 770, 870, 970, 1070, 1090, 1170, and 1175, represent a pivotal chapter in the history of British agricultural machinery. These tractors, produced between 1968 and 1980, were known for their robust construction, reliable performance, and distinct, easily recognizable styling. They were designed to be versatile workhorses, capable of handling a wide range of tasks across various farm sizes and applications. Powered by strong Perkins diesel engines with outputs ranging from 70 to 115 horsepower, these tractors offered ample power for pulling heavy implements, operating PTO-driven machinery, and managing demanding farm operations. The 770-1175 series was renowned for its durability, with many units still actively contributing to agricultural productivity across the globe, a testament to David Brown's commitment to quality engineering. Beyond their raw power and reliability, these tractors offered a range of features that enhanced operator comfort and efficiency. The spacious cab provided a comfortable working environment, while the hydraulic system provided smooth and responsive control. The series also introduced innovative features like the "Power-On-Demand" system, which optimized engine power and fuel efficiency based on the demands of the task at hand. This innovative approach, coupled with the tractors' versatility and ruggedness, solidified the 770-1175 series as a favorite among farmers seeking reliable and hardworking machines. Their enduring popularity and continued presence in the fields stand as a testament to their legacy as powerful, dependable, and highly respected agricultural companions.