David Brown 780
The David Brown 780 is a tractor produced by David Brown. It is equipped with a 164.4 ci 2.7 L engine. The listed engine power is Diesel (gross): 46 hp / 34.3 kW. Transmission: sliding gear. Operating weight: 3,470 lbs 1573 kg.
Engine Power
Diesel (gross): 46 hp / 34.3 kW
Fuel & Capacities
9.5 gal
36.0 L
Transmission
sliding gear
Operating Weight
3,470 lbs
1573 kg
Overview
 | 1967 - 1971 |
|---|
Production | |
|---|---|
Manufacturer | David Brown |
Built in Meltham Mills, Huddersfield, England | |
Total built | 8,986 |
Original price was $4,000 in 1971 | |
David Brown 780 Engine | |
|---|---|
David Brown 2.7L 3-cyl diesel | |
Fuel tank | 9.5 gal
36.0 L |
Engine details ...  | |
David Brown 780 Power | |
|---|---|
Engine (gross) | 46 hp
34.3 kW |
Drawbar (claimed) | 38.9 hp
29.0 kW |
PTO (claimed) | 42.9 hp*Maximum PTO power. Rated power at 540 RPM was 37.1 HP.
32.0 kW |
Mechanical | |
|---|---|
Two-wheel drive | |
Manual steering | |
Mechanical drum brakes |
Hydraulics | |||||
|---|---|---|---|---|---|
Pressure | 2000 psi
137.9 bar | ||||
Pump flow | 7.4 gpm
28.0 lpm | ||||
Oil type | SAE20W30SAE20W40 | SAE20W30 | SAE20W40 | ||
SAE20W30 | |
|---|---|
SAE20W40 |
Tractor hitch | |
|---|---|
Rear Type | I |
Rear lift | 1600 lbs
725 kg |
Power Take-off (PTO) | |
|---|---|
Rear PTO | live |
Rear PTO Type | 540/1000 |
Engine RPM | 540@1828 |
1000@2000 | |
Dimensions & Tires | |
|---|---|
Wheelbase | 75.8 inches
192 cm |
Weight | 3,470 lbs
1573 kg |
Front tire | 6.00-16 |
Rear tire | 12.4/11-28 |
Full dimensions and tires ...  | |
Electrical | |
|---|---|
Ground | negative |
Engine
Engine Detail — 164.4 ci / 2.7 L Diesel
Manufacturer | David Brown |
Fuel Type | Diesel |
Configuration | 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 |
Transmission
Transmission options | |
|---|---|
12-speed | |
6-speed |
Transmission — sliding gear
Transmission | sliding gear |
Gears | 12 forward and 4 reverse |
Clutch | dry disc |
Oil capacity | 24 qts
22.7 L |
Transmission — 6 forward and 2 reverse
Gears | 6 forward and 2 reverse |
Clutch | dry disc |
Dimensions
David Brown 780 Tires | |
|---|---|
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 |
Photos
David Brown 780
David Brown 780 with German Fritzmeier cab.
Open station David Brown 780.
Rear view of the David Brown 780.
Recommended Implements & Sizing Guide
Engineering recommendations for David Brown 780 based on its 46 HP power envelope and ASAE agricultural standards.
| Implement & Operation | Recommended Size | Workload Rating | Engineering Notes |
|---|---|---|---|
Moldboard PlowPrimary Tillage | 2 to 3 Bottom (14-16")2 - 3 铧 (35-40 cm) | Medium Duty | Standard utility farm tillage. |
Rotary Cutter / MowerMowing & Clearing | 6 ft (72 in)1.8 m | Medium Duty | Medium pasture clearing; rear slip-clutch recommended. |
Rotary TillerSeedbed Prep | 66 to 72 in165 - 180 cm | Medium Duty | Standard utility tiller; slip clutch protection required. |
Disc HarrowSecondary Tillage | 7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙 | Medium Duty | Field leveling and clod breaking behind plows. |
Hay BalerHay & Forage | Small Square Baler (14x18")小方捆打捆机 (36x46 cm) | Medium Duty | Classic 2-string baler for horse and small livestock hay. |
Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.
Fluids, Capacities & Working Autonomy
Standard fluid requirements, service intervals, and continuous runtime estimates for David Brown 780.
Estimated Continuous Field Runtime: 4 hrs
Approximately 4 hours of continuous field operation at ~75% rated power on a full tank (9.5 gal / 36 L).
Estimated 75% Load Fuel Burn~2.4 gal/hr (9.1 L/hr)
Engine Crankcase Oil
SAE 15W-40 (Heavy Duty Diesel)
Standard Spec: API CK-4 / CJ-4 Heavy Duty
Service Interval: 150 – 250 Hours
Transmission & Hydraulic System
UTTO (Universal Tractor Transmission Oil)
Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)
Service Interval: 600 – 1000 Hours
Engine Cooling System
50/50 Ethylene Glycol Pre-mix
Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze
Service Interval: 2 Years / 1500 Hours
David Brown 780 Specification Unit Converter
Convert power, fluid capacities, and operating weights between metric and imperial standards for David Brown 780.
Converted Equivalents:
Horsepower (HP)46 hp
Kilowatts (kW)34.3 kW
Metric Horsepower (PS / CV)46.6 PS
Direct Competitor Comparison
Compare David Brown 780 against same-era industry alternatives in the same horsepower class.
Current Model
David Brown
David Brown 780
Engine Power:Diesel (gross): 46 hp / 34.3 kW
★ Baseline Reference
Related models
David Brown 900
- Power:
- 40
- Production years:
- 1956 - 1958
David Brown 950
- Power:
- 42.5
- Production years:
- 1958 - 1959
David Brown 3800
- Power:
- 43.3
- Production years:
- 1968 - 1971
David Brown 40TD
- Power:
- 43.3
- Production years:
- 1960 - 1963
David Brown 880
- Power:
- 44.4
- Production years:
- 1961 - 1971