| Manufacturer |
David Brown |
| Price |
4,000(USD) |
| Model |
780 |
| Equipment Type |
- |
| Factory |
Meltham Mills, Huddersfield, England |
DAVID BROWN 780 POWER
| Engine (gross) |
46 hp/34.3 kW |
| Drawbar (claimed) |
38.9 hp/29.0 kW |
| PTO (claimed) |
42.9 hp/32.0 kW *Maximum PTO power. Rated power at 540 RPM was 37.1 HP. |
ENGINE DETAIL
The David Brown 780 tractor features a 3-cylinder, 2.7 L diesel engine, providing a gross power output of 46 hp at a rated RPM of 2200, which ensures efficient performance for small to medium agricultural jobs. Its 17:1 compression ratio allows for increased thermal efficiency, although it may require high-quality diesel fuel to avoid knocking. With moderate oil and coolant capacities (6.5 qts and 10 qts, respectively), this tractor is suitable for regular maintenance schedules, but owners should be aware of the potential challenges in sourcing specific parts, given its vintage nature.
| Description |
David Brown/diesel/3-cylinder/liquid-cooled |
| Displacement |
164.4 ci/2.7 L |
| Bore/Stroke |
3.9375x4.50 inches/100 x 114 mm |
| Power (gross) |
46 hp/34.3 kW |
| Compression |
17:1 |
| Rated RPM |
2200 |
| Idle RPM |
700-2200 |
| Firing order |
1-2-3 |
| Oil capacity |
6.5 qts/6.2 L |
| Coolant capacity |
10 qts/9.5 L |
DAVID BROWN 780 ENGINE
The David Brown 780 tractor features a robust 2.7L 3-cylinder diesel engine, offering a good balance of power and fuel efficiency. Its 9.5-gallon (36.0 L) fuel tank allows for extended operation periods, making it suitable for medium-duty agricultural tasks without frequent refueling. However, the relatively smaller engine capacity may limit its performance in heavy-duty applications compared to larger models.
| Description |
David Brown 2.7L 3-cyl diesel |
| Fuel tank |
9.5 gal/36.0 L |
TRANSMISSIONS OVERVIEW
The David Brown 780 tractor features a 12-speed transmission option, providing enhanced flexibility in various operational scenarios, such as fieldwork or transport tasks. The 6-speed variant, while simpler, offers robust performance for less demanding applications. Operators should consider their specific use case, as the 12-speed ensures finer speed control and optimized fuel efficiency in dynamic environments, whereas the 6-speed is more straightforward with potentially lower maintenance complexities.
| Description |
12-speed/6-speed |
TRANSMISSION 1
The David Brown 780 tractor features a sliding gear transmission with 12 forward and 4 reverse gears, providing versatility for various farming tasks. The dry disc clutch allows for efficient power transfer, though it may require more frequent maintenance compared to wet clutches. With an oil capacity of 24 quarts (22.7 L), it supports adequate lubrication, but operators should ensure timely oil changes to maintain optimal performance and longevity.
| Transmission |
sliding gear |
| Gears |
12 forward and 4 reverse |
| Clutch |
dry disc |
| Oil capacity |
24 qts/22.7 L |
TRANSMISSION 2
The David Brown 780 tractor features a 6-speed forward and 2-speed reverse gearbox, which allows for versatile speed selection, facilitating both heavy-duty applications and maneuverability in tighter spaces. The dry disc clutch provides reliability and easier replacement under typical operating conditions, though it may require more frequent adjustment compared to wet clutches. Overall, this configuration is advantageous for combining power with operational efficiency, making it suitable for a range of agricultural tasks.
| Gears |
6 forward and 2 reverse |
| Clutch |
dry disc |
MECHANICAL
The David Brown 780 tractor features a 4x2 2WD chassis, which offers good traction for light to moderate agricultural tasks but may face challenges in adverse terrains. Its manual steering system can provide better feedback but requires more physical effort, particularly during tight maneuvers. The 12-speed transmission allows for versatile speed control, benefiting various applications, while the mechanical drum brakes may require more maintenance compared to hydraulic systems, posing a potential downside in terms of efficiency and safety.
| Chassis |
4x2 2WD |
| Steering |
manual |
| Brakes |
mechanical drum |
| Transmissions |
12-speed/6-speed |
HYDRAULICS
| Pressure |
2000 psi/137.9 bar |
| Pump flow |
7.4 gpm/28.0 lpm/SAE20W30/SAE20W40 |
TRACTOR HITCH
| Rear Type |
I |
| Rear lift |
1600 lbs/725 kg |
POWER TAKE-OFF (PTO)
| Rear PTO |
live |
| Rear RPM |
540/1000 |
| Engine RPM |
540@1828/1000@2000 |
DAVID BROWN 780 TIRES
The David Brown 780 tractor features front tires sized 6.00-16 and rear tires 12.4/11-28, providing a balanced configuration that enhances stability and traction on various terrains. The front tire size aids in steering responsiveness while the larger rear tires contribute to improved load-bearing capacity and reduced soil compaction, making it optimal for agricultural applications. However, operators should be mindful of potential challenges in tighter maneuverability due to the overall dimensions when navigating smaller fields.
| Ag front |
6.00-16 |
| Ag rear |
12.4/11-28 |
DIMENSIONS
| Wheelbase |
75.8 inches/192 cm |
| Length |
111.75 inches/283 cm |
| Width |
64 inches/162 cm |
| Height |
82.5 inches/209 cm |
| Weight |
3,470 lbs/1573 kg |
| Ground clearance |
11.75 inches/29 cm |
DIMENSIONS & TIRES
The David Brown 780 tractor features a compact wheelbase of 75.8 inches, enhancing maneuverability in tight agricultural spaces. Weighing 3,470 lbs, its moderate weight provides stability but may limit flotation on softer terrains, requiring careful consideration in wet conditions. The tire sizing (6.00-16 front and 12.4/11-28 rear) contributes to a balanced load distribution, optimizing traction and performance during field operations, yet may necessitate adjustments for specific soil types or crop conditions.
| Wheelbase |
75.8 inches/192 cm |
| Weight |
3,470 lbs/1573 kg |
| Front tire |
6.00-16 |
| Rear tire |
12.4/11-28 |
780 SERIAL NUMBERS
| Location |
Front-right side of chassis, just behind the radiator |
| 1967 |
600001 |
| 1968 |
600879 |
| 1969 |
602853 |
| 1970 |
606109 |
| 1971 |
609665 |
ELECTRICAL
