- Rigid chassis
- WhichTractor size: Utility
- No lab test on file
- 1965–1979
- 23,285 built
WhichTractor size, not the maker’s category
The source says so, in a sentence about this machine. How we decide what a machine is
David Brown 990 Selectmatic specs: hp, weight, years
DAVID BROWN AD 4/47 or AD 4/49 A (B) four-cylinder diesel.
- Weight
- 5,688 lb
- 3-point lift
- 2,000 lb
- Hyd. flow
- 7.3 gpm
- Top speed
- 15.5 mph
David Brown 990 Selectmatic specs: key facts
The David Brown 990 Selectmatic was built from 1965 to 1979.
The David Brown 990 Selectmatic is two-wheel drive (2WD).
The David Brown 990 Selectmatic has a DAVID BROWN AD 4/47 or AD 4/49 A (B) engine, a 4-cylinder diesel unit.
The David Brown 990 Selectmatic weighs 2,580 kg (5,688 lb) unladen.
The David Brown 990 Selectmatic has a rear PTO running at 540 rpm.
The three-point hitch of the David Brown 990 Selectmatic lifts 907 kg (2,000 lb) at the lower-link ends.
The hydraulic pump of the David Brown 990 Selectmatic delivers 27.5 L/min (7.3 gpm).
Source · Traktorenlexikon, “David Brown 990”
How much horsepower does a 990 Selectmatic have?
No sourced power figure for the 990 Selectmatic is on record yet.
What engine is in a 990 Selectmatic?
A 990 Selectmatic has a DAVID BROWN AD 4/47 or AD 4/49 A (B), a 4-cylinder diesel engine.
| Make & model | DAVID BROWN AD 4/47 or AD 4/49 A (B) |
|---|---|
| Cylinders | 4, liquid-cooled |
| Max torque | 140 lb·ft · 190 N·m @ 1,400 rpm |
| Injection | direct injection |
| Electrical system | 12 V |
Source · Traktorenlexikon, “David Brown 990”
How much will a 990 Selectmatic lift, and what is its hydraulic flow?
A 990 Selectmatic lifts 2,000 lb (907 kg) at the lower-link ends.
| Pump flow | 7.3 gpm · 27.5 L/min |
|---|---|
| Lift at ends | 2,000 lb · 907 kg |
| Rear PTO | transmission-driven, 540 rpm @ 1,828 engine rpm |
| PTO shaft | 1 3/8"- 6 splines (Form-A) |
Source · Traktorenlexikon, “David Brown 990”
What transmission does a 990 Selectmatic have?
Transmission specifications for the 990 Selectmatic are below.
| Clutch | pedal-operated dry Borg & Beck single-disc clutch |
|---|---|
| Brakes | mechanical drum brake in the drive trumpets |
| Steering | mechanical recirculating ball steering |
| Top speed | 15.5 mph · 25 km/h |
Source · Traktorenlexikon, “David Brown 990”
How much does a 990 Selectmatic weigh?
A 990 Selectmatic weighs 5,688 lb (2,580 kg) unladen.
| Unladen weight | 5,688 lb · 2,580 kg |
|---|---|
| Wheelbase | 78.7 in · 2,000 mm |
| Length | 126.0 in · 3,200 mm |
| Width | 67.0 in · 1,702 mm |
| Height | 59.5 in · 1,511 mm |
| Ground clearance | 21.4 in · 543 mm |
| Front track | 52.0–72.0 in · 1,321–1,829 mm |
| Rear track | 52.0–76.0 in · 1,321–1,930 mm |
| Turning radius, braked | 10.3 ft · 3.14 m |
Source · Traktorenlexikon, “David Brown 990”
What oil does a 990 Selectmatic take, and how much?
A 990 Selectmatic engine takes 7.8 qt (7.39 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.
| System | Capacity |
|---|---|
| Engine oil | 7.8 qt · 7.39 LSource: Traktorenlexikon, “David Brown 990” · single source, not independently verified |
| Transmission | 24.0 qt · 22.7 LSource: Traktorenlexikon, “David Brown 990” · single source, not independently verified |
| Final drives | 2.4 qt · 2.27 LSource: Traktorenlexikon, “David Brown 990” · single source, not independently verified |
| Cooling system | 15.0 qt · 14.2 LSource: Traktorenlexikon, “David Brown 990” · single source, not independently verified |
Always confirm against the operator’s manual for your machine before service.
Which tractors compare with a 990 Selectmatic?
Within 10% of its 46.0 hp at the PTO as the maker claimed it, with no laboratory test on file, the same type, and first built within 15 years of it.
- IMR-RAKOVICA R-6045.9 hp PTO, claimed · from 1967Side by side with the 990 Selectmatic →
- International Harvester 55346.1 hp PTO, claimed · 1972–1974Side by side with the 990 Selectmatic →
- International Harvester 47546.1 hp PTO, claimed · 1974–1975Side by side with the 990 Selectmatic →
- Deutz D 500645.8 hp PTO, claimed · 1968–1974Side by side with the 990 Selectmatic →
- Porsche-Diesel Master 41846.2 hp PTO, claimed · 1960Side by side with the 990 Selectmatic →
- Porsche-Diesel Master 40846.2 hp PTO, claimed · 1958–1960Side by side with the 990 Selectmatic →
Common questions about the David Brown 990 Selectmatic
Is a 990 Selectmatic two-wheel drive or four-wheel drive?
The David Brown 990 Selectmatic is two-wheel drive (2WD).
What PTO does a 990 Selectmatic have?
A 990 Selectmatic has a 540 rpm rear PTO on a 1 3/8"- 6 splines (Form-A) shaft.
What serial numbers does a 990 Selectmatic carry?
The source prints serial numbers 482001 to 505286 for the type 990-A/990-B. It does not say whether that is the tractor’s or the engine’s number, and we never work out a year from a serial number.
Sources and how this page was built
Compiled from Traktorenlexikon, “David Brown 990”.
Sources
Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution
- Traktorenlexikon: David Brown 990 — CC BY-SA 4.0, WIKIBOOKS-TL-93774 · revision 1024294. Wikibooks contributors (Traktorenlexikon). Original document