David Brown 990 Tractor |
Preview – the David Brown 990 Tractor
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The David Brown 990 tractor was manufactured in Meltham Mills, Huddersfield, in England. Production of this model began in 1971, and discontinued in 1980. There was a serial number break in December of 1976. |
Lubricants and Fluids: Quick View
|
Fuel |
Diesel Fuel |
15.9 |
gallons |
|
60.2 |
liters |
Engine Motor Oil |
|
7.9 |
quarts |
|
7.5 |
liters |
Coolant: |
|
14.8 |
quarts |
|
14.0 |
liters |
Hydraulic Fluid |
The david bBrown 990 tractor was fitted with the new Selectamatic hydraulic system. while the models 990A and 990B were fitted with the older Implematic hydraulic system. |
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Pressure: |
2000 |
psi |
|
138 |
bar |
|
Total Flow |
7 |
gpm |
|
27 |
lpm |
Transmission Oil |
|
24.3 |
quarts |
|
23.0 |
liters |
David Brown 990 3-Point Hitch:
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Rear Type: |
I,II |
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Rear Lift: |
|
2000 |
lbs |
|
907 |
kg |
|
|
4250 |
lbs |
|
1928 |
kg |
Power Take-off (PTO):
|
Rear PTO: |
|
540/1000 |
|
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|
|
|
|
-unknown- |
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Dimensions & Tires:
|
Wheelbase: |
|
29 |
inches |
|
201 |
cm |
Weight |
|
5175 to 8195 |
pounds |
|
2347-3717 |
kg |
Front tire: |
|
6.00-19 |
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Rear tire: |
|
12.4/11-36 |
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David Brown 990 Drawbar, Engine & PTO Power:
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Engine (net): |
|
57.20 |
hp |
|
42.65 |
kw |
Drawbar (tested): |
|
45.68 |
hp |
|
34.06 |
kw |
PTO (tested): |
|
53.77 |
hp |
|
40.10 |
kw |
Mechanical Desriptions
|
Chassis: |
4×2 2WD. The tractors are all 2WD, however some models will be power assist. |
Steering: |
Most tractors are manually drive, however, some models are fitted with the optional hydrostatic power cyclinder to provide assistance in steering. The steering cylinder is controlled by the orbitol steerin valve in the hdrostatic steering models. |
Brakes: |
differential mechanical expanding shoe |
Cab: |
Cab optional. |
Electrical & Ignition Systems
|
Ground: |
|
Battery Volts: |
12. The original battery was manufatucred by Exide . |
Battery Amp-hours: |
96 |
Alternator Description |
The alternator was manufactured by lucas. Lucas part number is 23623, (Case IH part number K925009). This is 12V and 45amps. |
Starter Description |
Depending on the model, and year of amnufactur, the starter can eithe rbe lucas (part number 26278, except 885) or manufactured by Bosch. the Case IH part number is K954700 with the solenoid part number K965139. |
David Brown 990 Engine:Model 449001
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Type: |
David Brown |
Fuel/Aspiration. |
Diesel |
Cylinders: |
4 |
Valves: |
-unknown- |
Bore/Stroke: |
|
3.625 |
inches |
x |
4.500 |
inches |
|
|
92 |
mm |
x |
114 |
mm |
Displacement: |
|
185.8 |
cubic inch |
x |
3.0 |
liters |
Cooling: |
Liquid |
|
Air Cleaner: |
Oil bath |
Compression: |
17:01 |
Rated RPMs: |
2200 |
David Brown 990 Engine:AD4/47
|
Type: |
David Brown |
Fuel/Aspiration |
diesel |
Cylinders: |
4 |
Valves: |
-unknown- |
Bore/Stroke: |
|
3.94 |
inches |
x |
4.00 |
inches |
|
|
100 |
mm |
x |
102 |
mm |
Displacement: |
|
194.90 |
cubic inch |
x |
3.19 |
liters |
Cooling: |
liquid |
Air Cleaner: |
oil bath |
Compression: |
17:01 |
Rated RPMs: |
2200 |
Oil capacity: |
|
8 |
qts |
|
7 |
L |
Transmission:
|
Gears: |
6 forward and 2 reverse, Partially synchronised, Partially synchronised |
Comments: |
One of many different gearboxes are found on these tractors. This can be the 6-speed Synchromesh (livedrive) , 6-speed Non-synchromesh (non-livedrive) , 12-speed Synchromesh (livedrive) , 12-speed Synchromesh, 6-Speed (complete With Differential), Livedrive , or the 12-Speed (complete With Differential), Livedrive, |
Average Dimensions:
|
Weight (Operating) |
|
5175 |
lbs |
|
2347 |
kg |
Weight (ballasted): |
|
8195 |
lbs |
|
3717 |
kg |
Drawbar Capacity: |
|
3000 |
lbs |
|
1361 |
kg |
|
(extended) |
2500 |
lbs |
|
1134 |
kg |
Wheelbase: |
|
79 |
inches |
|
201 |
cm |
Length: |
|
126 |
inches |
|
320 |
cm |
Width: |
|
67 |
inches |
|
170 |
cm |
Height (ROPS): |
|
101 |
inches |
|
257 |
cm |
Clearance (front axle): |
|
21 |
inches |
|
53 |
cm |
Clearance (drawbar): |
|
15 |
inches |
|
38 |
cm |
David Brown 990 Tires:
|
Ag front: |
6.00-19 |
7.50-16 |
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|
|
|
Ag rear: |
12.4/11-36 |
13.6/12-36 |
16.9/14-30 |
|
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Nebraska Tractor Test 903:
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Test Date: |
June 11-19, 1965 |
|
|
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Type: |
6-speed 2WD |
|
|
|
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Engine: |
186 diesel |
|
|
|
|
|
PTO power (rated engine speed): |
51.60 |
hp |
|
38.48 |
kW |
PTO fuel use (engine speed): |
3.40 |
gal/hour |
|
12.87 |
l/hour |
PTO power (rated PTO speed): |
48.49 |
hp |
|
36.16 |
kW |
PTO fuel use (PTO speed): |
3.00 |
gal/hour |
|
11.36 |
l/hour |
Drawbar power (max): |
43.47 |
hp |
|
32.42 |
kW |
Drawbar fuel use (max): |
3.40 |
gal/hour |
|
12.87 |
l/hour |
Drawbar pull (max): |
6039.00 |
lbs |
|
2739.24 |
kg |
Max pull gear: |
1 |
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Nebraska Tractor Test 977:
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Test Date: |
May 27 – June 3, 1968 |
|
|
|
Type: |
6-speed 2WD |
|
|
|
Engine: |
195 diesel |
|
|
|
PTO power (rated engine speed): |
52.07 |
hp |
|
38.83 |
kW |
PTO fuel use (engine speed): |
3.20 |
gal/hour |
|
12.11 |
l/hour |
PTO power (rated PTO speed): |
49.65 |
hp |
|
37.02 |
kW |
PTO fuel use (PTO speed): |
3.00 |
gal/hour |
|
11.36 |
l/hour |
Drawbar power (max): |
43.31 |
hp |
|
32.30 |
kW |
Drawbar fuel use (max): |
3.10 |
gal/hour |
|
11.73 |
l/hour |
Drawbar pull (max): |
7142.00 |
lbs |
|
3239.56 |
kg |
Max pull gear: |
1-Lo |
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Nebraska Tractor Test 1144:
|
Test Date: |
September 17 – October 1, 1973 |
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|
|
Type: |
12-Speed 2WD |
|
|
|
|
Engine: |
195 diesel |
|
|
|
|
|
PTO power (rated engine speed): |
53.77 |
hp |
|
40.10 |
kW |
PTO fuel use (engine speed): |
3.50 |
gal/hour |
|
13.25 |
l/hour |
PTO power (rated PTO speed): |
50.48 |
hp |
|
37.64 |
kW |
PTO fuel use (PTO speed): |
3.30 |
gal/hour |
|
12.49 |
l/hour |
Drawbar power (max): |
45.68 |
hp |
|
34.06 |
kW |
Drawbar fuel use (max): |
3.40 |
gal/hour |
|
12.87 |
l/hour |
Drawbar pull (max): |
7335.00 |
lbs |
|
3327.10 |
kg |
Max pull gear: |
HS-1 |
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David Brown 990 Tractor Year & Prices: Average Trade In Value, and Used Retail Price
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Average Trade In Price
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Average Retail Price
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Tractor Year and Serial Number
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Average Price of New Tractor US$
|
US$
|
Give/ Take
US$ |
|
US$
|
Give/Take US$
|
1961: 440001 |
$4,100 |
$1,695 |
$335 |
|
$3,080 |
$230 |
1962: 441323 |
$4,100 |
$1,710 |
$330 |
|
$3,110 |
$230 |
1963: 450376 |
$4,300 |
$1,725 |
$325 |
|
$3,130 |
$230 |
1964: 460376 |
$4,500 |
$1,725 |
$325 |
|
$3,170 |
$220 |
1965: 472273 |
$4,600 |
$1,725 |
$325 |
|
$3,210 |
$210 |
1966: 483768 |
$4,900 |
$1,770 |
$290 |
|
$,3240 |
$200 |
1967: 496283 |
$5,000 |
$1,780 |
$280 |
|
$3,250 |
$220 |
1968: 504690 |
$5,300 |
$1,790 |
$270 |
|
$3,255 |
$235 |
1969: 808150 |
$5,600 |
$1,805 |
$255 |
|
$3,240 |
$240 |
1970: 818301 |
$6,100 |
$1,800 |
$260 |
|
$3,225 |
$245 |
1971: 826009 |
$6,700 |
$1,800 |
$260 |
|
$3,255 |
$215 |
1972: 850600 |
$7,200 |
$1,920 |
$290 |
|
$3,495 |
$235 |
1973: 854403 |
$7,600 |
$1,985 |
$305 |
|
$3,615 |
$265 |
1974: 859367 |
$8,200 |
$2,090 |
$330 |
|
$3,831 |
$311 |
1975: 863900 |
$8,800 |
$2,200 |
$350 |
|
$4,070 |
$330 |
1976: 11070001 |
$9,200 |
$2,260 |
$370 |
|
$4,260 |
$300 |
1977: 11080236 |
$9,800 |
$2,360 |
$390 |
|
$4,515 |
$295 |
1978: 11089141 |
$10,400 |
$2,480 |
$390 |
|
$4,825 |
$295 |
1979: 11096828 |
$10,900 |
$2,585 |
$405 |
|
$4,950 |
$270 |
Road Speeds
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