David Brown 990 Implematic Specs ( 1961-1980 )
Production
| Description | Utility tractor / Built in Meltham Mills, Huddersfield, England |
|---|---|
| Manufacturer | David Brown |
Engine
| Engine type | David Brown 3.0L 4-cyl diesel |
|---|---|
| Fuel tank | 13.74 gal (52.0 L) |
| Air cleaner | oil bath |
| Bore/Stroke | 3.625x4.50 inches (92 x 114 mm) |
| Compression | 17:1 |
| Coolant capacity | 14.4 qts (13.6 L) |
| Description | David Brown / diesel / 4-cylinder / liquid-cooled |
| Displacement | 185.8 ci (3.0 L) |
| Oil capacity | 7.8 qts (7.4 L) |
| Operating RPM | 700-2200 |
| Power | 52 hp (38.8 kW) |
| Rated RPM | 2200 |
| Starter volts | 12 |
| Drawbar (claimed) | 43 hp (32.1 kW) |
| Drawbar (tested) | 43.47 hp (32.4 kW) |
| PTO (claimed) | 48 hp (35.8 kW) |
| PTO (tested) | 51.60 hp (38.5 kW) |
Transmission
| Clutch | 279mm dry disc |
|---|---|
| Description | Three gears (1-3) plus reverse (R) in low and high ranges. / Twelve-speed transmission introduced in 1963. |
| Gears | 6 forward and 2 reverse / 12 forward and 4 reverse |
| Type | gear / partially synchronized |
| Transmission type | 6-speed gear / 12-speed partially synchronized |
| Transmission type | 6-speed gear / 12-speed partially synchronized |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Differential mechanical expanding shoe brakes |
| Differential lock | mechanical rear |
| Drive type | Two-wheel drive |
| Steering | manual |
Hydraulics
| Pressure | 2000 psi (137.9 bar) |
|---|---|
| Total flow | 7.4 gpm (28.0 lpm) |
| Type | open center |
Hitch
| Rear Type | II/I |
|---|
PTO
| Clutch | dry disc |
|---|---|
| Engine RPM | 540@1800 (Low) |
| Rear PTO | transmission |
| Rear PTO Type | 540/1000 (1.375) |
Electrical
| Batteries | 2 |
|---|---|
| Battery volts | 6 |
| Charging system | generator |
Dimensions & Tires
| Standard tires (ag) | Front: 6.00-16. Rear: 11-32 |
|---|---|
| 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) |
| Height (hood) | 56 inches (142 cm) |
| Length | 118 inches (299 cm) |
| Rear tread | 52/56/60/64/68/72/76 inches (132/142/152/162/172/182/193 cm) |
| Wheelbase | 76.75 inches (194 cm) |
| Width | 67 inches (170 cm) |
| Front tire | 6.00-16 |
| Rear tire | 11-32 |
| Weight | 4272 to 4312 pounds |
| Wheelbase | 76.75 inches (194 cm) |
990 Serial Numbers
| 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 |
| Description | FAQ: How to read a serial number table. |
| Location: | Frame, right side |
David Brown 990 Weight
| Ballasted | 5880 lbs (2667 kg) |
|---|---|
| Operating | 4272 lbs (1937 kg) |
Nebraska Tractor Test 903
| Description | 3L diesel 6-speed 2WDJune 11 - 19, 1965Link: Nebraska Tractor Test 903 file / PTO performance / Drawbar performance / Gear 3 used for power test. / Gear 1 used for pull test. |
|---|---|
| Fuel use | 3.4 gal/hour (12.9 l/hour) / 3.0 gal/hour (11.4 l/hour) / 3.4 gal/hour (12.9 l/hour) |
| Max power | 43.47 hp (32.4 kW) |
| Max pull | 6,039 lbs (2739 kg) |
| Power at rated engine speed | 51.60 hp (38.5 kW) |
| Power at rated PTO speed | 48.49 hp (36.2 kW) |