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Tractor · 1961Unverified

David Brown 990 Selectamatic

Name: David Brown 990 Selectamatic
Brand: David Brown

David Brown 990 Selectamatic — Model year 1961-19651965-19701971-1980 · 55 hp. Reference specifications; pending source verification.

The David Brown 990 Selectamatic is a tractor with a rated power of 55 hp, categorised as a lighter model within its class. Manufactured from 1961 to 1980, this model features a 4-cylinder diesel liquid-cooled engine, paired with four-wheel drive and a hydrostatic transmission. It has an operating weight of 4235 to 5795 pounds, making it suitable for operations covering up to 200 acres.

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

Catalogue coverage

Variants represented

Richest spec table

115 rows

Recorded power

55 hp

Transmissions

6-speed gear

Production years

1961-1980

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

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.

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