Tractor · 1961Unverified
David Brown 990 Implematic
David Brown 990 Implematic — Model year 1961-19651965-19701971-1980 · 52 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
52 hp
Max power
32.4 kW
Weight
4272 to 4312 pounds
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.