David Brown 990 tractor specifications

1961 - 1980

1961 - 1980 Model year 1961-19651965-19701971-1980 Utility tractor

Production

Production Manufacturer:David Brown
Type:Utility tractor
Factory:Meltham Mills, Huddersfield, England

David Brown 990 Power

David Brown 990 Power Engine:52 hp
38.8 kW
Drawbar (claimed):43 hp
32.1 kW
PTO (claimed):48 hp
35.8 kW
Drawbar (tested):43.47 hp
32.4 kW
PTO (tested):51.60 hp
38.5 kW
power test details ...

1961 - 1980

Model year 1961-19651965-19701971-1980

Utility tractor

Nebraska Tractor Test 903

Nebraska Tractor Test 903
3L diesel 6-speed 2WD June 11 - 19, 1965 Link: Nebraska Tractor Test 903 file
PTO performance
Power at rated engine speed:	51.60 hp 38.5 kW
Fuel use:	3.4 gal/hour 12.9 l/hour
Power at rated PTO speed:	48.49 hp 36.2 kW
Fuel use:	3.0 gal/hour 11.4 l/hour
Drawbar performance
Max power:	43.47 hp 32.4 kW
Fuel use:	3.4 gal/hour 12.9 l/hour
Gear 3 used for power test.
Max pull:	6,039 lbs 2739 kg
Gear 1 used for pull test.

David Brown 990 Engine

David Brown 990 Engine David Brown 3.0L 4-cyl diesel Fuel tank:13.74 gal
52.0 L
Engine details ...

1961 - 1980

Model year 1961-19651965-19701971-1980

Utility tractor

Engine Detail

Engine Detail
David Brown
diesel
4-cylinder
liquid-cooled
Displacement:	185.8 ci 3.0 L
Bore/Stroke:	3.625x4.50 inches 92 x 114 mm
Power:	52 hp 38.8 kW
Air cleaner:	oil bath
Compression:	17:1
Rated RPM:	2200
Operating RPM:	700-2200
Starter volts:	12
Oil capacity:	7.8 qts 7.4 L
Coolant capacity:	14.4 qts 13.6 L

Mechanical

Mechanical Chassis:4x2 2WD
Differential lock:mechanical rear
Steering:manual
hydrostatic power (optional)
Brakes:differential mechanical expanding shoe
Cab:Open operator station.
Transmissions:6-speed gear
12-speed partially synchronized
Transmission details ...

1961 - 1980

Model year 1961-19651965-19701971-1980

Utility tractor

Transmissions overview

Transmissions overview
6-speed gear
12-speed partially synchronized

Transmission

Transmission
Type:	gear
Gears:	6 forward and 2 reverse
Clutch:	279mm dry disc
Three gears (1-3) plus reverse (R) in low and high ranges.

Speeds

Speeds

Transmission

Transmission
Type:	partially synchronized
Gears:	12 forward and 4 reverse
Twelve-speed transmission introduced in 1963.

Hydraulics

Hydraulics Type:open center
Pressure:2000 psi
137.9 bar
Total flow:7.4 gpm
28.0 lpm

Tractor hitch

Tractor hitch Rear Type:II/I

Power Take-off (PTO)

Power Take-off (PTO) Rear PTO:transmission
live (optional)
Clutch:dry disc
Rear RPM:540/1000 (1.375)
Engine RPM:540@1800 (Low)
540@1100 (High)
1000@2000

Dimensions & Tires

Dimensions & Tires Wheelbase:76.75 inches
194 cm
Weight:4272 to 4312 pounds
Front tire:6.00-16
Rear tire:11-32
Full dimensions and tires ...

1961 - 1980

Model year 1961-19651965-19701971-1980

Utility tractor

David Brown 990 Tires

David Brown 990 Tires
Standard tires (ag):	Front: 6.00-16. Rear: 11-32

Dimensions

Dimensions
Wheelbase:	76.75 inches 194 cm
Length:	118 inches 299 cm
Width:	67 inches 170 cm
Height (hood):	56 inches 142 cm
Clearance (front axle):	20 inches 50 cm
Front tread:	52/56/60/64/68/72/76 inches 132/142/152/162/172/182/193 cm
Rear tread:	52/56/60/64/68/72/76 inches 132/142/152/162/172/182/193 cm

David Brown 990 Weight

David Brown 990 Weight
Operating:	4272 lbs 1937 kg
	4312 lbs 1955 kg (live PTO)
Ballasted:	5880 lbs 2667 kg

990 Serial Numbers

990 Serial Numbers Location:Frame, right side
1961:440001
1962:441323
1963:450376
1964:460376
1965:472273
1966:483768
1967:496283
1968:504690
1969:808150
1970:818301
1971:826009
1972:850600
1973:854403
1974:859367
1975:863900
1976:11070001
1977:11080236
1978:11089141
1979:11096828
1980:11104577

how to read serial numbers...