David Brown 770 Selectamatic Specs ( 1965-1970 )
Overview
The David Brown 770 Selectamatic is a versatile utility tractor powered by a 36 hp 2.4L 3-cylinder diesel engine and a 12-speed gear transmission. Built in Meltham Mills, this model features a live rear PTO and a rear lift capacity of 1,600 lbs, making it a capable machine for diverse farm operations during the late 1960s.
Ideal Applications
Field Work:
Equipped with a 2-plow capacity and a 12-speed gear transmission, this tractor is designed for efficient light tillage and field cultivation.
Lifting and Loading:
The open center hydraulic system provides 2000 psi of pressure and a rear lift capacity of 1,600 lbs with both position and draft control for managing various rear-mounted implements.
Row Crop Operations:
With adjustable front and rear treads ranging from 48 to 76 inches and a ground clearance of 11 inches, this tractor is adaptable for different crop spacing and rows.
Production
| Description | Utility tractor / Built in Meltham Mills, Huddersfield, England / Original price was $3,600 in 1970 |
|---|---|
| Manufacturer | David Brown |
Engine
| Engine type | David Brown 2.4L 3-cyl diesel |
|---|---|
| Fuel tank | 11.4 gal (43.1 L) |
| Bore/Stroke | 3.94x4.00 inches (100 x 102 mm) |
| Compression | 17:1 |
| Coolant capacity | 12 qts (11.4 L) |
| Description | David Brown AD3/49 / diesel / 3-cylinder / liquid-cooled |
| Displacement | 146.1 ci (2.4 L) |
| Firing order | 1-2-3 |
| Fuel system | direct injection |
| Idle RPM | 700-2000 |
| Oil capacity | 7.8 qts (7.4 L) |
| Power | 36 hp (26.8 kW) |
| Rated RPM | 2055 |
| Starter | electric |
| Starter volts | 12 |
| Torque | 100 lb-ft (135.6 Nm) |
| Torque RPM | 1400 |
| Plows | 2 |
| PTO (claimed) | 32 hp (23.9 kW) |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 12 forward and 4 reverse |
| Oil capacity | 28.8 qts (27.3 L) |
| Transmission type | 12-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual steering / Mechanical drum brakes |
| Differential lock | mechanical rear |
| Drive type | Two-wheel drive |
| Final drives | spur gear |
Hydraulics
| Pressure | 2000 psi (137.9 bar) |
|---|---|
| Pump flow | 6.6 gpm (25.0 lpm) |
| Type | open center |
Hitch
| Control | position and draft control |
|---|---|
| Rear lift (at ends) | 1600 lbs (725 kg) |
| Rear Type | I |
PTO
| Engine RPM | 540@1620 |
|---|---|
| Rear PTO | live |
| Rear PTO Type | 540 (1.375) |
Electrical
| Battery AH | 96 |
|---|---|
| Battery volts | 12 |
| Ground | negative |
Dimensions & Tires
| Ag front | 6.00-16 / 5.50-16 |
|---|---|
| Ag rear | 12.4/11-28 / 11.2/10-28 |
| 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) |
| Height (exhaust) | 80.5 inches (204 cm) |
| Height (steering wheel) | 55.5 inches (140 cm) |
| Length | 112.5 inches (285 cm) |
| Rear tread | 48/52/56/60/64/68/72/76 inches (121/132/142/152/162/172/182/193 cm) |
| Wheelbase | 75 inches (190 cm) |
| Width | 64 inches (162 cm) |
| Front tire | 6.00-16 |
| Rear tire | 12.4/11-28 |
| Weight | 3110 to 3270 pounds |
| Wheelbase | 75 inches (190 cm) |
Belt Pulley
| Diameter | 8.5 inches (21 cm) |
|---|---|
| RPM | 2023 |
| Speed | 3100 ft/min (944.88 meters/min) |
| Width | 5.2 inches (13 cm) |
David Brown 770 Weight
| Max capacity | 4470 lbs (2027 kg) |
|---|---|
| Operating | 3270 lbs (1483 kg) |
| Shipping | 3110 lbs (1410 kg) |
References
| Description | Selectamatic published in 1965, by David Brown / Selectamatic published in 1965, by David Brown |
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