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Engine:
David Brown Standard
Power:
52 HP (Engine) / HP (PTO)
Fuel Type:
Diesel
Production:
1961 - 1980
| Overview | |
|---|---|
| Summary | x1961 - 1980 Model year 1961-1965 1965-1970 1971-1980 Utility tractor |
| Production | |
|---|---|
| Manufacturer | David Brown |
| Summary | Utility tractor / Built in Meltham Mills, Huddersfield, England |
| Mechanical | |
|---|---|
| Summary | Two-wheel drive |
| Differential lock | mechanical rear |
| Steering | manual |
| hydrostatic power (optional) | |
| Summary | Differential mechanical expanding shoe brakes / Open operator station. |
| Hydraulics | |
|---|---|
| Type | open center |
| Pressure | 2000 psi 137.9 bar |
| Total flow | 7.4 gpm 28.0 lpm |
| Tractor hitch | |
|---|---|
| Rear Type | II/I |
| Electrical | |
|---|---|
| Charging system | generator |
| Batteries | 2 |
| Battery volts | 6 |
| Engine Detail | |
|---|---|
| Summary | 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 |
| Transmission options | |
|---|---|
| Summary | 6-speed gear / 12-speed partially synchronized |
| Transmission | |
|---|---|
| Type | gear |
| Gears | 6 forward and 2 reverse |
| Clutch | 279mm dry disc |
| Summary | Three gears (1-3) plus reverse (R) in low and high ranges. |
| Transmission | |
|---|---|
| Type | partially synchronized |
| Gears | 12 forward and 4 reverse |
| Summary | Twelve-speed transmission introduced in 1963. |
| David Brown 990 Tires | |
|---|---|
| Standard tires (ag) | Front: 6.00-16. Rear: 11-32 |
| 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 | |
|---|---|
| Operating | 4272 lbs 1937 kg |
| 4312 lbs (live PTO) 1955 kg | |
| Ballasted | 5880 lbs 2667 kg |
| Nebraska Tractor Test 903 | |
|---|---|
| Summary | 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 |
| Summary | Drawbar performance |
| Max power | 43.47 hp 32.4 kW |
| Fuel use | 3.4 gal/hour 12.9 l/hour |
| Summary | Gear 3 used for power test. |
| Max pull | 6,039 lbs 2739 kg |
| Summary | Gear 1 used for pull test. |
Last Database Update: 6/21/2025