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Tractor · 1961Unverified

David Brown 990 Implematic

Name: David Brown 990 Implematic
Brand: David Brown

David Brown 990 Implematic — Model year 1961-19651965-19701971-1980 · 52 hp. Reference specifications; pending source verification.

The David Brown 990 Implematic is a tractor model with a rated output of 52 hp, classified as a compact option within its range. It was manufactured from 1961 to 1980. The tractor features a 4-cylinder diesel liquid-cooled engine, coupled to a hydrostatic transmission and two-wheel drive system. Its listed weight ranges from 4272 to 4312 pounds, with a capacity for approximately 200 acres of work.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

52 hp

Max power

32.4 kW

Weight

4272 to 4312 pounds

Catalogue coverage

Variants represented

Richest spec table

100 rows

Recorded power

52 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

Two-wheel driveReference

Differential lockmechanical rearReference

SteeringmanualReference

Steeringhydrostatic power (optional)Reference

Differential mechanical expanding shoe brakesReference

Open operator station.Reference

Engine

David Brown 3.0L 4-cyl dieselReference

Fuel tank52.0 LReference

Engine38.8 kWReference

Drawbar (claimed)32.1 kWReference

Drawbar (tested)32.4 kWReference

David BrownReference

dieselReference

4-cylinderReference

liquid-cooledReference

Displacement3.0 LReference

Bore/Stroke92 x 114 mmReference

Power38.8 kWReference

Air cleaneroil bathReference

Compression17:1Reference

Rated RPM2200Reference

Operating RPM700-2200Reference

Starter volts12Reference

Oil capacity7.4 LReference

Coolant capacity13.6 LReference

Power at rated engine speed38.5 kWReference

Max power32.4 kWReference

Transmission

6-speed gearReference

12-speed partially synchronizedReference

TypegearReference

Gears6 forward and 2 reverseReference

Clutch279mm dry discReference

Three gears (1-3) plus reverse (R) in low and high ranges.Reference

Typepartially synchronizedReference

Gears12 forward and 4 reverseReference

Twelve-speed transmission introduced in 1963.Reference

PTO & Hydraulics

PTO (claimed)35.8 kWReference

PTO (tested)38.5 kWReference

Typeopen centerReference

Pressure137.9 barReference

Total flow28.0 lpmReference

Rear TypeII/IReference

Rear PTOtransmissionReference

Rear PTOlive (optional)Reference

Clutchdry discReference

Rear PTO Type540/1000 (1.375)Reference

Engine RPM540@1800 (Low)Reference

Engine RPM540@1100 (High)Reference

Engine RPM1000@2000Reference

Power at rated PTO speed36.2 kWReference

Dimensions

Wheelbase194 cmReference

Weight4272 to 4312 poundsReference

Front tire6.00-16Reference

Rear tire11-32Reference

Standard tires (ag)Front: 6.00-16. Rear: 11-32Reference

Length299 cmReference

Width170 cmReference

Height (hood)142 cmReference

Clearance (front axle)50 cmReference

Front tread132/142/152/162/172/182/193 cmReference

Rear tread132/142/152/162/172/182/193 cmReference

Operating1937 kgReference

Operating1955 kgReference

Ballasted2667 kgReference

990 Serial Numbers

Location:Frame, right sideReference

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

Batteries2Reference

Battery volts6Reference

Test results

3L diesel 6-speed 2WDJune 11 - 19, 1965Link: Nebraska Tractor Test 903 fileReference

PTO performanceReference

Fuel use12.9 l/hourReference

Fuel use11.4 l/hourReference

Drawbar performanceReference

Gear 3 used for power test.Reference

Max pull2739 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.

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