Introduction
David Brown 990 Utility Tractor
The David Brown 990 is a utility tractor produced in Meltham Mills, Huddersfield, England, between 1961 and 1980. Designed as a versatile agricultural machine, it served a wide range of farming operations throughout its twenty-year production run.
Engine and Performance
The tractor is powered by a liquid-cooled, four-cylinder David Brown diesel engine with a displacement of 3.0 liters (185.8 cubic inches). It produces 52 horsepower (38.8 kW) at a rated engine speed of 2200 RPM. The engine features a compression ratio of 17:1 and relies on an oil bath air cleaner for intake filtration. It operates within a range of 700 to 2200 RPM.
Transmission and Drivetrain
The 990 offers two primary transmission configurations: a standard 6-speed gear transmission with 2 reverse gears, or a 12-speed partially synchronized transmission introduced in 1963, which provides 4 reverse gears. Power is transferred via a 279mm dry disc clutch. The tractor is configured as a two-wheel-drive unit and includes a mechanical rear differential lock to improve traction in field conditions.
Hydraulics and PTO
The hydraulic system utilizes an open-center design with a total flow capacity of 7.4 gpm (28.0 lpm) at a system pressure of 2000 psi (137.9 bar). The rear Power Take-Off (PTO) is designed to operate at 540 or 1000 RPM, depending on the engine speed, with a 1.375-inch shaft. An optional live PTO system is available for increased operational flexibility with implements.
Dimensions and Operator Station
The tractor features an open operator station with manual steering, which could be upgraded to optional hydrostatic power steering. The wheelbase measures 76.75 inches (194 cm) with an overall length of 118 inches (299 cm). The rear and front tread widths are adjustable, ranging from 52 to 76 inches (132 to 193 cm), allowing the machine to be adapted for various row-crop spacings.
Conclusion
The David Brown 990 is a mechanical utility tractor suited for general agricultural tasks. Its combination of a reliable 52-hp diesel engine, choice of gear transmissions, and adjustable tread widths makes it a practical choice for farmers requiring a straightforward, adaptable machine for field and yard work.
David Brown 990 Manuals & Documentation
Download the manuals and documentation available for the David Brown 990: repair and workshop manuals, operator's handbooks, spare-parts catalogs and technical leaflets — free PDF files.
- Livret d'entretienPDF · 19.131 Mo
- Livret d'instructionsPDF · 24.608 Mo
- Livret d'instructions - page 001 à 043PDF · 18.326 Mo
- Livret d'instructions - page 044 à 089PDF · 20.217 Mo
- Livret d'instructions - page 090 à 139PDF · 20.005 Mo
Archive documentation provided for reference, hosted by Tractor-Info.
Production Information of David Brown, 990
- Utility tractor
- Built in Meltham Mills, Huddersfield, England
| Manufacturer | David Brown |
|---|
Dimension and Tires Information of David Brown, 990
| Rear tread | 52/56/60/64/68/72/76 inches [132/142/152/162/172/182/193 cm] |
|---|---|
| Wheelbase | 76.75 inches [194 cm] |
| Clearance (front axle) | 20 inches [50 cm] |
| Height (hood) | 56 inches [142 cm] |
| Length | 118 inches [299 cm] |
| Front tread | 52/56/60/64/68/72/76 inches [132/142/152/162/172/182/193 cm] |
| Width | 67 inches [170 cm] |
| Standard tires (ag) | Front: 6.00-16. Rear: 11-32 |
|---|
Engine Specifications of David Brown, 990
- David Brown
- Liquid-cooled
- 4-cylinder
- Diesel
| Air cleaner | Oil bath |
|---|---|
| Operating RPM | 700-2200 |
| Displacement | 185.8 ci [3.0 L] |
| Bore/Stroke | 3.625x4.50 inches [92 x 114 mm] |
| Power | 52 hp [38.8 kW] |
| Rated RPM | 2200 |
| Compression | 17:1 |
| Coolant capacity | 14.4 qts [13.6 L] |
| Oil capacity | 7.8 qts [7.4 L] |
| Starter volts | 12 |
Transmission Information of David Brown, 990
Transmission variants 1
- Three gears (1-3) plus reverse (R) in low and high ranges.
| Type | Gear |
|---|---|
| Gears | 6 forward and 2 reverse |
| Clutch | 279mm dry disc |
Transmission variants 2
- Twelve-speed transmission introduced in 1963.
| Type | Partially synchronized |
|---|---|
| Gears | 12 forward and 4 reverse |
- 6-speed gear
- 12-speed partially synchronized
Mechanical Specs of David Brown, 990
- Two-wheel drive
- Differential mechanical expanding shoe brakes
- Open operator station.
| Differential lock | Mechanical rear |
|---|---|
| Steering | Manual |
Power Information of David Brown, 990
| Rear PTO | Transmission |
|---|---|
| Engine RPM | 540@1800 (Low) |
| Rear PTO Type | 540/1000 (1.375) |
| Rear PTO Type(optional) | Live (optional) |
| Rear PTO Type(optional) | 540@1100 (High) |
| Clutch | Dry disc |
Hydraulics Specifications of David Brown, 990
| Type | Open center |
|---|---|
| Pressure | 2000 psi [137.9 bar] |
| Total flow | 7.4 gpm [28.0 lpm] |
Three-Point Hitch of David Brown, 990
| Rear Type | II/I |
|---|
Electrical System of David Brown, 990
| Charging system | Generator |
|---|---|
| Batteries | 2 |
| Battery volts | 6 |
Where it sits
With 52 HP, the David Brown 990 sits between 4600 (51 HP) and 1290 (58 HP) in David Brown's range. Its power puts it in the 53th percentile of 1960s models in our database (709 machines).
Frequently asked questions
How much horsepower does the David Brown 990 have?
The David Brown 990 delivers 52 HP.
What years was the David Brown 990 produced?
The David Brown 990 was produced in 1961-1980.
What engine does the David Brown 990 have?
The David Brown 990 is powered by a Diesel, 4-cylinder engine.
What transmission does the David Brown 990 use?
The David Brown 990 uses a Gear transmission.
Is the David Brown 990 4WD?
The David Brown 990 is available in 2WD.