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David Brown 850

David Brown 850 tractor
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The David Brown 850 is a utility tractor produced from 1960 to 1965. It was built in Meltham Mills, Huddersfield, England. The tractor features a 2.5L 4-cylinder engine available in diesel or gasoline versions, producing 35 hp. It has a 6-speed unsynchronized transmission with 2 reverse gears, two-wheel drive, and mechanical expanding shoe brakes. The tractor offers a rear PTO with optional live PTO and a dry disc clutch. Dimensions include a 75.25 inch wheelbase and a weight ranging from 3750 to 4179 pounds depending on configuration.
David Brown 850tractorutility tractor2.5L enginediesel tractorgasoline tractor35 hp tractortractor specifications
Power35 hp
Founded1960 - 1965
Model850

Technical Specifications

Detailed specifications and technical data for David Brown 850

Power

Engine power:35 hp (26.1 kW)
PTO (tested):33.56 hp (25.0 kW)
PTO (claimed):33 hp (24.6 kW)
Drawbar (tested):30.93 hp (23.1 kW)
Drawbar (claimed):30 hp (22.4 kW)

Engine

Power:35 hp (26.1 kW)
Idle RPM:700-2000
Rated RPM:2000
Air cleaner:oil bath
Bore/Stroke:3.50x4.00 inches (89 x 102 mm)
Compression:17:1
Fuel system:direct injection
Displacement:154 ci (2.5 L)
Oil capacity:10.1 qts (9.6 L)
Diesel engine:David Brown, diesel, 4-cylinder, liquid-cooled
Starter volts:12
Engine options:David Brown 2.5L 4-cyl diesel, David Brown 2.5L 4-cyl gasoline
Gasoline engine:David Brown, gasoline, 4-cylinder, liquid-cooled
Coolant capacity:14.4 qts (13.6 L)
Gasoline engine Rated RPM:2000
Gasoline engine Air cleaner:oil bath
Gasoline engine Bore/Stroke:3.50x4.00 inches (89 x 102 mm)
Gasoline engine Compression:6.25:1
Gasoline engine displacement:154 ci (2.5 L)
Gasoline engine Starter volts:12

Weight

Shipping:3750 lbs (1701 kg)
Ballasted:5874 lbs (2664 kg)
Gas Operating:4094 lbs (1857 kg)
Diesel Operating:4179 lbs (1895 kg)

Mechanical

Drive:Two-wheel drive
Brakes:Differential mechanical expanding shoe brakes
Steering:Manual steering
Final drives:spur gear
Operator station:Open operator station

Production

Type:Utility tractor
Built in:Meltham Mills, Huddersfield, England
Years produced:1960 - 1965

Transmission

Type:unsynchronized gear
Gears:6 forward and 2 reverse
Clutch:dry disc
Gear arrangement:Three gears (1-3) plus reverse (R) in two ranges (low and high)

Tractor hitch

Rear Type:I

Dimensions & Tires

Length:113.5 inches (288 cm)
Rear tire:10-28
Wheelbase:75.25 inches (191 cm)
Front tire:5.00-15
Rear tread:52/56/60/64/68/72 inches (132/142/152/162/172/182 cm)
Front tread:52/56/60/64/68/72 inches (132/142/152/162/172/182 cm)
Height (hood):51.75 inches (131 cm)

Power Take-off (PTO)

Clutch:dry disc
Live PTO:Optional
Rear PTO:transmission
Engine RPM:540@1800, 540@1100, 1000@2000
Rear PTO Type:540/1000 (1.375)