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David Brown 780

David Brown 780 tractor
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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.
David Brown 780tractorfarm tractorspecificationsenginetransmissiondimensionshydraulicsPTODavid Brown tractors
Power46 hp
Founded1967 - 1971
Model780

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

Gears:6 forward and 2 reverse
Clutch:dry disc

12-speed

Type:sliding gear
Gears:12 forward and 4 reverse
Clutch:dry disc
Oil capacity:24 qts (22.7 L)
Transmission options:12-speed, 6-speed

Tractor hitch

Rear Type:I
Rear lift:1600 lbs (725 kg)

Serial Numbers

1967:600001
1968:600879
1969:602853
1970:606109
1971:609665
Location:Front-right side of chassis, just behind the radiator

Power Take-off (PTO)

Rear PTO:live
Engine RPM:540@1828, 1000@2000
Rear PTO Type:540/1000