David Brown 990 Implematic
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| Production | |
| Manufacturer | David Brown |
| Utility tractor | |
| Built in Meltham Mills, Huddersfield, England | |
| David Brown 990 Engine | |
| David Brown 3.0L 4-cyl diesel | |
| Fuel tank | 13.74 gal 52.0 L |
 Engine details ... | |
| David Brown 990 Transmissions | |
| 6-speed gear | |
| 12-speed partially synchronized | |
 Transmission details ... |
| 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 |
 Performance test details ... | |
| Mechanical | |
| Two-wheel drive | |
| Differential lock | mechanical rear |
| Steering | manual |
| hydrostatic power (optional) | |
| Differential mechanical expanding shoe brakes | |
| Open operator station. | |
| Photos | |
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 David Brown 990 photos... | |
| Hydraulics | |
| Type | open center |
| Pressure | 2000 psi 137.9 bar |
| Total flow | 7.4 gpm 28.0 lpm |
| Tractor hitch | |
| Rear Type | II/I |
| Power Take-off (PTO) | |
| Rear PTO | transmission |
| live (optional) | |
| Clutch | dry disc |
| Rear PTO Type | 540/1000 (1.375) |
| Engine RPM | 540@1800 (Low) |
| 540@1100 (High) | |
| 1000@2000 | |
| 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 ... | |
| 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 |
FAQ: How to read a serial number table. | |
| Electrical | |
| Charging system | generator |
| Batteries | 2 |
| Battery volts | 6 |
| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on June 4, 2020 |