- Rigid chassis
- WhichTractor size: Utility
- Not independently tested
- 1971–1976
- 18,540 built
WhichTractor size, not the maker’s category
Derived by WhichTractor from a sourced three-point linkage. How we decide what a machine is
David Brown 990 (A) Full specifications
DAVID BROWN AD 4/49 four-cylinder diesel. The manufacturer claimed 57.3 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.
Engine power, claimed · gross or net not stated
57.3 hp
42.7 kW as stated by the source
Not independently tested
Claimed · standard not stated by the source
Source · Traktorenlexikon, “David Brown 900 Synchromesh”, claimed
- Weight
- 5,699 lb
- 3-point lift
- 4,251 lb
- Top speed
- 15.5 mph
David Brown 990 (A) specs: key facts
The David Brown 990 (A) was built from 1971 to 1976.
The David Brown 990 (A) has a claimed engine power (gross or net not stated) of 42.7 kW (57.3 hp); it has no measured PTO figure.
The David Brown 990 (A) was built in two-wheel drive (2WD) and four-wheel drive (4WD) versions, depending on configuration.
The David Brown 990 (A) has a DAVID BROWN AD 4/49 engine, a 4-cylinder 3.19 L diesel unit.
The David Brown 990 (A) weighs 2,585 kg (5,699 lb) unladen.
The David Brown 990 (A) has an independent rear PTO running at 540 rpm.
The three-point hitch of the David Brown 990 (A) lifts 1,928 kg (4,251 lb) at the lower-link ends.
Source · Traktorenlexikon, “David Brown 900 Synchromesh”
How much horsepower does a 990 (A) have?
The only figure for the 990 (A) is 57.3 hp (42.7 kW) of claimed engine power, gross or net not stated, no test standard stated — not power at the shaft.
Source · Traktorenlexikon, “David Brown 900 Synchromesh”
What engine is in a 990 (A)?
A 990 (A) has a DAVID BROWN AD 4/49, a 4-cylinder 3.19 L diesel engine.
| Make & model | DAVID BROWN AD 4/49 |
|---|---|
| Cylinders | 4, liquid-cooled |
| Displacement | 194.9 ci · 3.19 L |
| Max torque | 152 lb·ft · 206 N·m @ 1,400 rpm |
| Electrical system | 12 V |
Source · Traktorenlexikon, “David Brown 900 Synchromesh”
How much will a 990 (A) lift?
A 990 (A) lifts 4,251 lb (1,928 kg) at the lower-link ends.
| Lift at ends | 4,251 lb · 1,928 kg |
|---|---|
| Rear PTO | Independent, engine-driven, 540 rpm @ 1,828 engine rpm |
| PTO shaft | 1 3/8"- 6 splines |
Source · Traktorenlexikon, “David Brown 900 Synchromesh”
What transmission does a 990 (A) have?
Transmission specifications for the 990 (A) are below.
| Clutch | Dry two-stage double clutch |
|---|---|
| Top speed | 15.5 mph · 25 km/h |
Source · Traktorenlexikon, “David Brown 900 Synchromesh”
How much does a 990 (A) weigh?
A 990 (A) weighs 5,699 lb (2,585 kg) unladen.
| Unladen weight | 5,699 lb · 2,585 kgtwo-wheel-drive version |
|---|---|
| Wheelbase | 82.0 in · 2,083 mm |
| Length | 130.0 in · 3,302 mm |
| Width | 67.0 in · 1,702 mm |
| Height | 99.0 in · 2,515 mm |
| Ground clearance | 20.9 in · 530 mmtwo-wheel-drive version |
| Front track | 52.0–72.0 in · 1,321–1,829 mmtwo-wheel-drive version |
| Rear track | 52.0–76.0 in · 1,321–1,930 mm |
| Turning radius, braked | 10.8 ft · 3.28 m |
Source · Traktorenlexikon, “David Brown 900 Synchromesh”
Which tractors compare with a 990 (A)?
Within 10% of its 46.8 hp at the PTO (claimed), the same type, and first built within 15 years of it.
- Hürlimann H-360 (A)46.8 hp PTO, claimed · 1979–1983Side by side with the 990 (A) →
- Landini 6030 (DT) TL-39 N/B (TL-39 DT/B)46.8 hp PTO, claimed · 1983–1987Side by side with the 990 (A) →
- Ford 4600 (A)46.7 hp PTO, claimed · 1975–1981Side by side with the 990 (A) →
- Fiat 55-90 (DT)46.7 hp PTO, claimed · 1984–1992Side by side with the 990 (A) →
- URSUS C-36046.7 hp PTO, claimed · 1976–1994Side by side with the 990 (A) →
- URSUS C-36246.7 hp PTO, claimed · 1976–1987Side by side with the 990 (A) →
Everything else people ask
Is a 990 (A) two-wheel drive or four-wheel drive?
The David Brown 990 (A) was built in two-wheel drive (2WD) and four-wheel drive (4WD) versions, depending on configuration.
What PTO does a 990 (A) have?
A 990 (A) has a independent 540 rpm rear PTO on a 1 3/8"- 6 splines shaft.
What serial numbers does a 990 (A) carry?
The source prints serial numbers 850001 to 868541 for the type 990/1. 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.
Where this page comes from
Compiled from Traktorenlexikon, “David Brown 900 Synchromesh”.
Sources
Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution
- Traktorenlexikon: David Brown 900 Synchromesh — CC BY-SA 4.0, WIKIBOOKS-TL-115991 · revision 990952. Wikibooks contributors (Traktorenlexikon). Original document