David Brown 3800 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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| Original price | $4,000 (1971) |
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Engine| (no label) | David Brown 2.4L 3-cyl gasoline |
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Transmission| (no label) | 6-speed gear |
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| (no label) | 12-speed gear |
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Power| PTO (claimed) | 39 hp | 29.1 kW |
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| Drawbar (tested) | 32.13 hp | 24.0 kW |
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| PTO (tested) | 39.16 hp | 29.2 kW |
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Mechanical| (no label) | Two-wheel drive |
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| Final drives | spur gear |
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| Differential lock | rear diff lock standard |
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| Steering | manual |
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| Steering | power-assist optional |
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| (no label) | Mechanical shoe brakes |
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| (no label) | Open operating station. |
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Capacity| Fuel | 9.5 gal | 36.0 L |
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| Hydraulic system | 6 gal | 22.7 L |
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Hydraulics| Type | Selectamatic |
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| Capacity | 6 gal | 22.7 L |
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| Pressure | 2000 psi | 137.9 bar |
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| Pump flow | 7.3 gpm | 27.6 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 (working) | 725 kg |
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| Rear lift (at ends) | 1950 lbs (static) | 884 kg |
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Pto| Rear PTO | live |
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| Rear PTO Type | 540/1000 |
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Dimensions| Wheelbase | 76 inches | 193 cm |
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| Weight | 3885 lbs | 1762 kg |
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| Front tire | 6.00-16 |
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| Rear tire | 13.6/12-28 |
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Engine
Engine detail| (no label) | David Brown |
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| (no label) | gasoline |
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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 | 3.939x4.000 inches | 100 x 102 mm |
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| Air cleaner | oil bath |
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| Compression | 6.75:1 |
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| Rated RPM | 2200 |
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| Operating RPM | 700-2200 |
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| Torque | 115 lb-ft | 155.9 Nm |
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| Torque RPM | 1400 |
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| Starter volts | 12 |
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| Oil capacity | 6.75 qts | 6.4 L |
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| Coolant capacity (Coolant) | 9 qts | 8.5 L |
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Transmission
Transmission options| (no label) | 6-speed gear |
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| (no label) | 12-speed gear |
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Transmission| Type | gear |
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| Gears | 6 forward and 2 reverse |
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| Clutch | dry disc |
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| Oil capacity | 24 qts | 22.7 L |
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| 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 | 24 qts | 22.7 L |
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Dimensions
Tires| Ag front | 6.00-16 |
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| Ag rear | 13.6/12-28 |
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| Ag front | 14.9/13-24 |
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| Ag front | 14.9/13-28 |
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Dimensions| Wheelbase | 76 inches | 193 cm |
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| Length | 115.625 inches | 293 cm |
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| Width | 64.5 inches (min) | 163 cm |
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| Height (hood) | 51.25 inches | 130 cm |
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| Operating weight | 3885 lbs | 1762 kg |
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| Ballasted weight | 5835 lbs | 2646 kg |
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| Clearance (front axle) | 17.5 inches | 44 cm |
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| Clearance (drawbar) | 11.75 inches | 29 cm |
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| Front tread | 48 to 72 inches | 121 to 182 cm |
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| Rear tread | 48 to 76 inches | 121 to 193 cm |
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| Rear tread | 60 to 80 inches (PAVT) | 152 to 203 cm |
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