David Brown 770 Selectamatic: all source data
All 73 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.
Overview
Production| Manufacturer | David Brown |
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| (no label) | Utility tractor |
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| (no label) | Built in Meltham Mills, Huddersfield, England |
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| (no label) | Original price was $3,600 in 1970 |
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Engine| (no label) | David Brown 2.4L 3-cyl diesel |
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| Fuel tank | 11.4 gal | 43.1 L |
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Transmission| (no label) | 12-speed gear |
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Power| Engine | 36 hp | 26.8 kW |
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| PTO (claimed) | 32 hp | 23.9 kW |
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| Plows | 2 |
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Mechanical| (no label) | Two-wheel drive |
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| Final drives | spur gear |
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| Differential lock | mechanical rear |
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| (no label) | Manual steering |
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| (no label) | Mechanical drum brakes |
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| (no label) | Open operator station. |
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Hydraulics| Type | open center |
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| Pressure | 2000 psi | 137.9 bar |
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| Pump flow | 6.6 gpm | 25.0 lpm |
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Hitch| Rear Type | I |
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| Control | position and draft control |
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| Rear lift (at ends) | 1600 lbs | 725 kg |
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Pto| Rear PTO | live |
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| Rear PTO Type | 540 (1.375) |
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| Engine RPM | 540@1620 |
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Dimensions| Wheelbase | 75 inches | 190 cm |
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| Weight | 3110 to 3270 pounds |
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| Front tire | 6.00-16 |
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| Rear tire | 12.4/11-28 |
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Belt pulley| Diameter | 8.5 inches | 21 cm |
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| Width | 5.2 inches | 13 cm |
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| RPM | 2023 |
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| Speed | 3100 ft/min | 944.88 meters/min |
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Electrical| Ground | negative |
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| Battery volts | 12 |
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| Battery AH | 96 |
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Engine
Engine detail| (no label) | David Brown AD3/49 |
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| (no label) | diesel |
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| (no label) | 3-cylinder |
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| (no label) | liquid-cooled |
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| Displacement | 146.1 ci | 2.4 L |
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| Bore/Stroke | 3.94x4.00 inches | 100 x 102 mm |
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| Power | 36 hp | 26.8 kW |
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| Fuel system | direct injection |
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| Compression | 17:1 |
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| Rated RPM | 2055 |
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| Idle RPM | 700-2000 |
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| Torque | 100 lb-ft | 135.6 Nm |
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| Torque RPM | 1400 |
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| Firing order | 1-2-3 |
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| Starter | electric |
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| Starter volts | 12 |
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| Oil capacity | 7.8 qts | 7.4 L |
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| Coolant capacity (Coolant) | 12 qts | 11.4 L |
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Transmission
Transmission| Type | gear |
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| Gears | 12 forward and 4 reverse |
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| Clutch | dry disc |
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| Oil capacity | 28.8 qts | 27.3 L |
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Dimensions
Tires| Ag front | 6.00-16 |
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| Ag rear | 12.4/11-28 |
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| Ag front | 5.50-16 |
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| Ag rear | 11.2/10-28 |
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Dimensions| Wheelbase | 75 inches | 190 cm |
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| Length | 112.5 inches | 285 cm |
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| Width | 64 inches | 162 cm |
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| Height (steering wheel) | 55.5 inches | 140 cm |
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| Height (exhaust) | 80.5 inches | 204 cm |
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| Clearance (drawbar) | 11 inches | 27 cm |
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| Front tread | 48/52/56/60/64/68/72/76 inches | 121/132/142/152/162/172/182/193 cm |
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| Rear tread | 48/52/56/60/64/68/72/76 inches | 121/132/142/152/162/172/182/193 cm |
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Weight| Shipping | 3110 lbs | 1410 kg |
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| Operating | 3270 lbs | 1483 kg |
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| Max capacity (Max) | 4470 lbs | 2027 kg |
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