Need the factory reference for your David Brown 780 Selectamatic? This 92-page operator manual covers the 780 Selectamatic, from first-day break-in precautions straight through to full specification data. Inside: a complete walk-through of Selectamatic Controls, live external service operation, differential lock, ballast, wheel width adjustments, and tyre pressures. You get a detailed lubrication chart, a recommended fuels and lubricants guide, linkage settings for both drawbar and Pick-up Hitch, and a specifications section listing every fluid capacity and accessory fitment. The hydraulic pump delivers 5 gal/min at 1800 rpm against a maximum system pressure of 2000 lb/in²; your 3-point linkage is rated to 1600 lb (725 kg) at the link ends. Your machine is down. Get the right numbers, not forum guesses. Bookmarked by section so you jump straight to what you need; one download and it opens on any device.
What's Inside This David Brown 780 Selectamatic, 780 Selectamatic Livedrive Operator Manual
| System | Pages | Key Topics |
|---|
| Precautions with a New Tractor | 4 | Engine Oil, Filter Element, Transmission Oil, Hydraulic Filter Element, Transmission Gearbox Flush, Wire Mesh Screen, Nylon Filter, Hydraulic By-Pass Valve Assembly |
| Operation | 5-38 | Starting the Engine, Controls, Selectamatic Controls, Operation of Services, Operation of Live External Services, Differential Lock, Ballast, Wheel Width Adjustments |
| Regular Maintenance | 39-51 | Lubrication Chart, Recommended Fuel Oil and Lubricants |
| Servicing Information | 52-77 | Index to Servicing Information, Wiring Diagram |
| Specification and Data | 78-92 | Capacities, Accessories, Abbreviations |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Maximum hydraulic system pressure | 2000 lb/in² (140 kg/cm²) | p. 85 |
| Hydraulic pump delivery | 5 gal/min (6 U.S. gal/min) (22-3 litres/min) at 1800 rev/min engine | p. 85 |
| Injectors pressure setting | 175 atmospheres (180 kg/cm²) | p. 81 |
| Maximum load at the end of the links | 1600 lb (725 kg) | p. 85 |
| Engine Oil Capacity | 6.25 L | p. 84 |
| Transmission Oil Capacity | 22.7 L | p. 84 |
| Fuel Tank Capacity | 36.4 L | p. 84 |
| Cooling System Capacity | 9.1 L | p. 84 |
| Rated Engine Speed | 1800 rev/min | p. 80 |
| Standard PTO Speed (at 1800 rev/min engine) | 532 rev/min | p. 85 |
| Valve Clearance (cold, inlet) | 0.010 in. (0.25 mm) | p. 80 |
| Cylinder Head Torque | 90 lb ft (12.5 kg m) | p. 65 |
