Tractor · 1961Unverified
David Brown 990 Selectamatic
David Brown 990 Selectamatic — Model year 1961-19651965-19701971-1980 · 55 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
55 hp
Max power
32.3 kW
Weight
4235 to 5795 pounds
Hover a source tag to verify
Overview
ManufacturerDavid BrownReference
Utility tractorReference
Built in Meltham Mills, Huddersfield, EnglandReference
Original price was $9,000 in 1976Reference
Two- or four-wheel driveReference
Differential lockmechanical rearReference
SteeringmanualReference
Steeringhydrostatic powerReference
Differential mechanical expanding shoe brakesReference
Open operator station.Reference
Engine
David Brown 3.2L 4-cyl dieselReference
Fuel tank60.9 LReference
Engine (gross)41.0 kWReference
Drawbar (claimed)3.0 kWReference
Plows4Reference
Drawbar (tested)32.3 kWReference
David BrownReference
dieselReference
4-cylinderReference
liquid-cooled inlineReference
Displacement3.2 LReference
Bore/Stroke100 x 102 mmReference
Power (gross)41.0 kWReference
Air cleaneroil bathReference
Compression17:1Reference
Rated RPM2200Reference
Idle RPM700-2200Reference
Torque189.8 NmReference
Torque RPM1400Reference
StarterelectricReference
Starter volts12Reference
Oil capacity7.5 LReference
Coolant capacity14.0 LReference
Power at rated engine speed38.8 kWReference
Max power32.3 kWReference
Transmission
6-speed gearReference
12-speed partially synchronizedReference
TypegearReference
Gears6 forward and 2 reverseReference
Clutchdry discReference
Typepartially synchronizedReference
Gears12 forward and 4 reverseReference
Oil capacity23.0 LReference
Three gears, plus reverse, in four ranges. Synchronized up-shifting between gears 1-2-3 and synchronized down-shifting from 3-to-2.Reference
PTO & Hydraulics
PTO (claimed)39.4 kWReference
PTO (tested)38.8 kWReference
Typeopen centerReference
Pressure137.9 barReference
Pump flow27.3 lpmReference
Rear TypeII/IReference
Controlposition and draft controlReference
Rear lift (at ends)907 kgReference
Rear PTOtransmissionReference
Rear PTOliveReference
Rear PTO Type540/1000 (1.375)Reference
Engine RPM540@1800Reference
Engine RPM1000@2000Reference
Power at rated PTO speed37.0 kWReference
Dimensions
2WD Wheelbase200 cmReference
4WD Wheelbase195 cmReference
Weight4235 to 5795 poundsReference
Front tire6.00-19Reference
2WD Rear tire12.4-36Reference
2WD Standard tires (ag)Front: 6.00-19. Rear: 12.4-36Reference
4WD Standard tires (ag)Front: 9.5-24. Rear: 12.4-36Reference
2WD Length320 cmReference
4WD Length322 cmReference
Width162 cmReference
2WD Clearance (front axle)54 cmReference
4WD Clearance (front axle)33 cmReference
2WD Clearance (drawbar)38 cmReference
4WD Clearance (drawbar)37 cmReference
2WD2313 kgReference
4WD2628 kgReference
2WD Shipping1920 kgReference
Steering wheel167 cmReference
990 Serial Numbers
Location:Serial number on the right side of the tractor frame.Reference
1961440001Reference
1962441323Reference
1963450376Reference
1964460376Reference
1965472273Reference
1966483768Reference
1967496283Reference
1968504690Reference
1969808150Reference
1970818301Reference
1971826009Reference
1972850600Reference
1973854403Reference
1974859367Reference
1975863900Reference
197611070001Reference
197711080236Reference
197811089141Reference
197911096828Reference
198011104577Reference
FAQ: How to read a serial number table.Reference
Electrical
Charging systemgeneratorReference
Battery volts12Reference
Battery AH96Reference
Capacities
2WD Max capacity2862 kgReference
4WD Max capacity2628 kgReference
David Brown 990 Height
ROPS241 cmReference
Exhaust226 cmReference
Test results
3.2L diesel 6-speed 2WDMay 27 - June 3, 1968Link: Nebraska Tractor Test 977 fileReference
PTO performanceReference
Fuel use12.1 l/hourReference
Fuel use11.4 l/hourReference
Drawbar performanceReference
Fuel use11.7 l/hourReference
Gear 1-High used for power test.Reference
Max pull3239 kgReference
Gear 1-Lo used for pull test.Reference
Speeds
With 12.4/11-36 rear tires.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.