- Rigid chassis
- WhichTractor size: Utility
- No lab test on file
- 1967–1971
- 11,550 built
It was ranked on an engine power figure whose source does not say gross or net. WhichTractor size, not the maker’s category
The source says so, in a sentence about this machine. How we decide what a machine is
David Brown 780 Selectamaric specs: hp, weight, years
DAVID BROWN AD 3/55 three-cylinder diesel. The manufacturer claimed 46.0 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.
Engine power, claimed · gross or net not stated
46.0 hp
34.3 kW as stated by the source
No lab test on file
Claimed · standard not stated by the source
Source · Traktorenlexikon, “David Brown 780”, claimed
This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.
- Weight
- 3,710 lb
- 3-point lift
- 2,879 lb
- Top speed
- 13.7 mph
David Brown 780 Selectamaric specs: key facts
The David Brown 780 Selectamaric was built from 1967 to 1971.
The David Brown 780 Selectamaric has a claimed engine power (gross or net not stated) of 34.3 kW (46.0 hp); it has no measured PTO figure.
The David Brown 780 Selectamaric is two-wheel drive (2WD).
The David Brown 780 Selectamaric has a DAVID BROWN AD 3/55 engine, a 3-cylinder 2.70 L diesel unit.Source 1
The David Brown 780 Selectamaric weighs 1,683 kg (3,710 lb) unladen.
The David Brown 780 Selectamaric has a rear PTO running at 540 rpm.
The three-point hitch of the David Brown 780 Selectamaric lifts 1,306.000 kg (2,879 lb) at the lower-link ends.
Source · Traktorenlexikon, “David Brown 780”
How does the 780 Selectamaric compare with its class?
- Limitation:
A 36.4 L fuel tank is low for its class — 33% below the median of 54 L across the 286 machines within 10% of its power that hold this figure.
Derived by WhichTractor from 317 comparable records. How we work this out
How much horsepower does a 780 Selectamaric have?
The only figure for the 780 Selectamaric is 46.0 hp (34.3 kW) of claimed engine power, gross or net not stated, no test standard stated — not power at the shaft.
Source · Traktorenlexikon, “David Brown 780”
What engine is in a 780 Selectamaric?
A 780 Selectamaric has a DAVID BROWN AD 3/55, a 3-cylinder 2.70 L diesel engine.
| Make & model | DAVID BROWN AD 3/55 |
|---|---|
| Cylinders | 3, liquid-cooledSource 2 |
| Displacement | 164.5 ci · 2.70 L |
| Max torque | 110 lb·ft · 149 N·m @ 1,500 rpmSource 2 |
| Electrical system | 12 VSource 2 |
Source · Traktorenlexikon, “David Brown 1190”
How much will a 780 Selectamaric lift?
A 780 Selectamaric lifts 2,879 lb (1,306.000 kg) at the lower-link ends of its Category 1 three-point hitch.
| Hitch category | Category 1 |
|---|---|
| Lift at ends | 2,879 lb · 1,306.000 kgFrom the Traktorenlexikon article's hydraulics section. |
| Rear PTO | transmission-driven, 540 rpm |
Source · Traktorenlexikon, “David Brown 780”
What transmission does a 780 Selectamaric have?
Transmission specifications for the 780 Selectamaric are below.
| Brakes | Mechanical drum brake in drive trumpets for service and parking brake |
|---|---|
| Steering | Mechanical recirculating ball steering |
| Top speed | 13.7 mph · 22 km/h |
Source · Traktorenlexikon, “David Brown 780”
How much does a 780 Selectamaric weigh?
A 780 Selectamaric weighs 3,710 lb (1,683 kg) unladen.
| Unladen weight | 3,710 lb · 1,683 kg |
|---|---|
| Maximum permissible mass | 5,247 lb · 2,380 kg |
| Wheelbase | 75.8 in · 1,926 mm |
| Length | 127.2 in · 3,230 mm |
| Width | 65.0 in · 1,650 mm |
| Height | 55.5 in · 1,410 mm |
| Ground clearance | 12.8 in · 324 mm |
| Front track | 48.0–72.0 in · 1,219–1,829 mm |
| Rear track | 48.5–76.5 in · 1,232–1,943 mm |
| Turning radius, braked | 10.2 ft · 3.10 m |
Source · Traktorenlexikon, “David Brown 780”
What oil does a 780 Selectamaric take, and how much?
A 780 Selectamaric engine takes 6.6 qt (6.25 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.
| System | Capacity |
|---|---|
| Engine oil | 6.6 qt · 6.25 LSource: Traktorenlexikon, “David Brown 780” · single source, not independently verified |
| Transmission | 24.0 qt · 22.7 LSource: Traktorenlexikon, “David Brown 780” · single source, not independently verified |
| Cooling system | 9.6 qt · 9.1 LSource: Traktorenlexikon, “David Brown 780” · single source, not independently verified |
Always confirm against the operator’s manual for your machine before service.
Which tractors compare with a 780 Selectamaric?
Within 10% of its 46.0 hp of claimed engine power, the same type, and first built within 15 years of it.
- David Brown 880 Selectamatic46.0 hp engine, claimed · 1965–1971Side by side with the 780 Selectamaric →
- ALLIS-CHALMERS D-1746.1 hp engine, claimed · 1957–1967Side by side with the 780 Selectamaric →
- Massey Ferguson 14846.4 hp engine, claimed · 1972–1978Side by side with the 780 Selectamaric →
- Massey Ferguson 15246.4 hp engine, claimed · 1972–1976Side by side with the 780 Selectamaric →
- Massey Ferguson 25546.4 hp engine, claimed · 1975–1981Side by side with the 780 Selectamaric →
- AGRIFULL 345-C (S)46.4 hp engine, claimed · 1976–1977Side by side with the 780 Selectamaric →
Common questions about the David Brown 780 Selectamaric
Is a 780 Selectamaric two-wheel drive or four-wheel drive?
The David Brown 780 Selectamaric is two-wheel drive (2WD).
What PTO does a 780 Selectamaric have?
A 780 Selectamaric has a 540 rpm rear PTO.
What serial numbers does a 780 Selectamaric carry?
The source prints serial numbers 600001 to 611551 for the type 780/1. It does not say whether that is the tractor’s or the engine’s number, and we never work out a year from a serial number.
Sources and how this page was built
Compiled from Traktorenlexikon, “David Brown 780”; and Traktorenlexikon, “David Brown 1190”.
Sources
Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution
- Traktorenlexikon: David Brown 1190 — CC BY-SA 4.0, WIKIBOOKS-TL-98543 · revision 991256. Wikibooks contributors (Traktorenlexikon). Original document
- Traktorenlexikon: David Brown 780 — CC BY-SA 4.0, WIKIBOOKS-TL-115477 · revision 989260. Wikibooks contributors (Traktorenlexikon). Original document