David Brown 990 Selectamatic
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| Production | |
| Manufacturer | David Brown |
| Utility tractor | |
| Built in Meltham Mills, Huddersfield, England | |
| David Brown 990 Selectamatic Engine | |
| David Brown 3.2L 4-cyl diesel | |
| Fuel tank | 17.9 gal 67.8 L |
 Engine details ... | |
| David Brown 990 Selectamatic Transmission | |
| 12-speed partially synchronized | |
 Transmission details ... |
| David Brown 990 Selectamatic Power | |
| Engine (net) | 58 hp 43.3 kW |
| Drawbar (claimed) | 45.2 hp 33.7 kW |
| PTO (claimed) | 52.9 hp 39.4 kW |
| Drawbar (tested) | 45.68 hp 34.1 kW |
| PTO (tested) | 53.77 hp 40.1 kW |
 Performance test details ... | |
| Mechanical | |
| Two- or four-wheel drive | |
| Power steering | |
| Hydraulic drum brakes | |
| Weather frame cab standard. |
| Hydraulics | |
| Type | open center |
| Pressure | 2000 psi 137.9 bar |
| Total flow | 7.4 gpm 28.0 lpm |
| Tractor hitch | |
| Rear Type | II/I |
| Rear lift | 2000 lbs (recommended) 907 kg |
| 4250 lbs (maximum) 1927 kg | |
| Power Take-off (PTO) | |
| Rear PTO | transmission |
| live OptOptional | |
| Rear PTO Type | 540/1000 (1.375) |
| Dimensions & Tires | |
| Wheelbase | 82 inches 208 cm |
| Weight | 5760 to 6700 pounds |
| Front tire | 6.00-19 |
| Rear tire | 12.4-36 (2WD) |
 Full dimensions and tires ... | |
| 990 Selectamatic Serial Numbers | |
| Location: | Serial number on the right side of the tractor frame. |
| 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 | alternator |
| Battery volts | 12 |
| Battery AH | 96 |
| References | |
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| 990 Synchromesh published by David Brown | |
| 990 Synchromesh published by David Brown |
| Page information | |
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| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on July 12, 2022 |