Tractor · 1968Unverified
David Brown 3800 Selectamatic
David Brown 3800 Selectamatic — Utility tractor · 39 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
39 hp
Max power
24.0 kW
Weight
1762 kg
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Overview
ManufacturerDavid BrownReference
Utility tractorReference
Built in Meltham Mills, Huddersfield, EnglandReference
Original price$4,000 (1971)Reference
Two-wheel driveReference
Final drivesspur gearReference
Differential lockrear diff lock standardReference
SteeringmanualReference
Steeringpower-assist optionalReference
Mechanical shoe brakesReference
Open operating station.Reference
Engine
David Brown 2.4L 3-cyl gasolineReference
Drawbar (tested)24.0 kWReference
David BrownReference
gasolineReference
3-cylinderReference
liquid-cooledReference
Displacement2.4 LReference
Bore/Stroke100 x 102 mmReference
Air cleaneroil bathReference
Compression6.75:1Reference
Rated RPM2200Reference
Operating RPM700-2200Reference
Torque155.9 NmReference
Torque RPM1400Reference
Starter volts12Reference
Oil capacity6.4 LReference
Coolant capacity8.5 LReference
Power at rated engine speed29.2 kWReference
Max power24.0 kWReference
Transmission
6-speed gearReference
12-speed gearReference
TypegearReference
Gears6 forward and 2 reverseReference
Clutchdry discReference
Oil capacity22.7 LReference
Gears12 forward and 4 reverseReference
PTO & Hydraulics
PTO (claimed)29.1 kWReference
PTO (tested)29.2 kWReference
Hydraulic system22.7 LReference
TypeSelectamaticReference
Capacity22.7 LReference
Pressure137.9 barReference
Pump flow27.6 lpmReference
Rear TypeIReference
Controlposition and draft controlReference
Rear lift (at ends)725 kgReference
Rear lift (at ends)884 kgReference
Rear PTOliveReference
Rear PTO Type540/1000Reference
Power at rated PTO speed27.8 kWReference
Capacities
Fuel36.0 LReference
Dimensions
Wheelbase193 cmReference
Weight1762 kgReference
Front tire6.00-16Reference
Rear tire13.6/12-28Reference
Ag front6.00-16Reference
Ag rear13.6/12-28Reference
Ag front14.9/13-24Reference
Ag front14.9/13-28Reference
Length293 cmReference
Width163 cmReference
Height (hood)130 cmReference
Operating weight1762 kgReference
Ballasted weight2646 kgReference
Clearance (front axle)44 cmReference
Clearance (drawbar)29 cmReference
Front tread121 to 182 cmReference
Rear tread121 to 193 cmReference
Rear tread152 to 203 cmReference
Test results
Gasoline 6-speed 2WDSeptember 2 - 11, 1969Link: Nebraska Tractor Test 1018 fileReference
PTO performanceReference
Fuel use13.6 l/hourReference
Fuel use12.5 l/hourReference
Drawbar performanceReference
Fuel use12.9 l/hourReference
Gear 3 used for power test.Reference
Max pull2004 kgReference
Gear 1 used for pull test.Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.