David Brown

David Brown 780

The David Brown 780 is a farm tractor produced from 1967 to 1971 by David Brown in Meltham Mills, Huddersfield, England. A total of 8,986 units were built. It features a 2.7L 3-cylinder diesel engine producing 46 hp gross, with a maximum PTO power of 42.9 hp. The tractor offers 12-speed and 6-speed transmission options with sliding gear and dry disc clutch. It has two-wheel drive, manual steering, and mechanical drum brakes. The hydraulic system operates at 2000 psi with a pump flow of 7.4 gpm. The tractor hitch is type I with a rear lift capacity of 1600 lbs. Dimensions include a wheelbase of 75.8 inches, length of 111.75 inches, width of 64 inches, height of 82.5 inches, and weight of 3,470 lbs. Tires are sized 6.00-16 front and 12.4/11-28 rear. Electrical system uses negative ground.

Power46 hp

Founded1967 - 1971

Model780

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Technical Specifications

Detailed specifications and technical data for David Brown 780

Power

PTO note	Maximum PTO power. Rated power at 540 RPM was 37.1 HP.
PTO (claimed)	42.9 hp (32.0 kW)
Engine (gross)	46 hp (34.3 kW)
Drawbar (claimed)	38.9 hp (29.0 kW)

Tires

Rear tire	12.4/11-28
Front tire	6.00-16

Engine

Type	David Brown 2.7L 3-cyl diesel
Idle RPM	700-2200
Fuel tank	9.5 gal (36.0 L)
Rated RPM	2200
Bore/Stroke	3.9375x4.50 inches (100 x 114 mm)
Compression	17:1
Displacement	164.4 ci (2.7 L)
Firing order	1-2-3
Oil capacity	6.5 qts (6.2 L)
Power (gross)	46 hp (34.3 kW)
Coolant capacity	10 qts (9.5 L)

Dimensions

Width	64 inches (162 cm)
Height	82.5 inches (209 cm)
Length	111.75 inches (283 cm)
Weight	3,470 lbs (1573 kg)
Wheelbase	75.8 inches (192 cm)
Ground clearance	11.75 inches (29 cm)

Electrical

Ground	negative

Hydraulics

Oil type	SAE20W30, SAE20W40
Pressure	2000 psi (137.9 bar)
Pump flow	7.4 gpm (28.0 lpm)

Mechanical

Drive	Two-wheel drive
Brakes	Mechanical drum brakes
Steering	Manual steering

Production

Built in	Meltham Mills, Huddersfield, England
Total built	8,986
Manufacturer	David Brown
Original price	$4,000 in 1971
Years produced	1967 - 1971

Transmission

6-speed	Gears6 forward and 2 reverse Clutchdry disc
12-speed	Typesliding gear Gears12 forward and 4 reverse Clutchdry disc Oil capacity24 qts (22.7 L)
Transmission options	12-speed, 6-speed