David Brown 770 Selectamatic

The David Brown 770 Selectamatic is a tractor produced by David Brown. It is equipped with a 146.1 ci 2.4 L engine. The rated power output is 36 hp 26.8 kW. Transmission: 12 forward and 4 reverse. Operating weight: 3110 to 3270 pounds.

Overview

	1965 - 1970 Selectamatic SeriesUtility tractor
1965 - 1970
Selectamatic Series
Utility tractor

Production
Manufacturer	David Brown
Utility tractor
Built in Meltham Mills, Huddersfield, England
Original price was $3,600 in 1970

David Brown 770 Engine
David Brown 2.4L 3-cyl diesel
Fuel tank	11.4 gal 43.1 L
Engine details ...

David Brown 770 Transmission
12-speed gear
Transmission details ...

David Brown 770 Power
Engine	36 hp 26.8 kW
PTO (claimed)	32 hp 23.9 kW
Plows	2

Mechanical
Two-wheel drive
Final drives	spur gear
Differential lock	mechanical rear
Manual steering
Mechanical drum brakes
Open operator station.

Hydraulics
Type	open center
Pressure	2000 psi 137.9 bar
Pump flow	6.6 gpm 25.0 lpm

Tractor hitch
Rear Type	I
Control	position and draft control
Rear lift (at ends)	1600 lbs 725 kg

Power Take-off (PTO)
Rear PTO	live
Rear PTO Type	540 (1.375)
Engine RPM	540@1620

Dimensions & Tires
Wheelbase	75 inches 190 cm
Weight	3110 to 3270 pounds
Front tire	6.00-16
Rear tire	12.4/11-28
Full dimensions and tires ...

Belt Pulley
Diameter	8.5 inches 21 cm
Width	5.2 inches 13 cm
RPM	2023
Speed	3100 ft/min 944.88 meters/min

Electrical
Ground	negative
Battery volts	12
Battery AH	96

References
Selectamatic published in 1965, by David Brown

Engine

Engine Detail — 146.1 ci / 2.4 L Diesel

Manufacturer	David Brown AD3/49
Fuel Type	Diesel
Configuration	3-cylinder, liquid-cooled
Displacement	146.1 ci 2.4 L
Bore/Stroke	3.94x4.00 inches 100 x 102 mm
Power	36 hp 26.8 kW
Fuel system	direct injection
Compression	17:1
Rated RPM	2055
Idle RPM	700-2000
Torque	100 lb-ft 135.6 Nm
Torque RPM	1400
Firing order	1-2-3
Starter	electric
Starter volts	12
Oil capacity	7.8 qts 7.4 L
Coolant capacity	12 qts 11.4 L

Transmission

Transmission — 12 forward and 4 reverse gear

Type	gear
Gears	12 forward and 4 reverse
Clutch	dry disc
Oil capacity	28.8 qts 27.3 L

Dimensions

David Brown 770 Tires
Ag front	6.00-16
Ag rear	12.4/11-28
Ag front	5.50-16
Ag rear	11.2/10-28

Dimensions
Wheelbase	75 inches 190 cm
Length	112.5 inches 285 cm
Width	64 inches 162 cm
Height (steering wheel)	55.5 inches 140 cm
Height (exhaust)	80.5 inches 204 cm
Clearance (drawbar)	11 inches 27 cm
Front tread	48/52/56/60/64/68/72/76 inches 121/132/142/152/162/172/182/193 cm
Rear tread	48/52/56/60/64/68/72/76 inches 121/132/142/152/162/172/182/193 cm

David Brown 770 Weight
Shipping	3110 lbs 1410 kg
Operating	3270 lbs 1483 kg
Max capacity	4470 lbs 2027 kg

Photos

1965 red David Brown 770 Selectamatic.

1965 red David Brown 770 Selectamatic.