- WhichTractor size: Utility
- No lab test on file
- 1961–1965
- 40,599 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 Implematic specs: hp, weight, years
DAVID BROWN AD 4/47 A four-cylinder diesel. The manufacturer claimed 52.0 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.
Engine power, claimed · gross or net not stated
52.0 hp
38.8 kW as stated by the source
No lab test on file
Claimed · standard not stated by the source
Source · Traktorenlexikon, “David Brown 990 Implematic”, claimed
This is the maker’s own figure, measured at the engine. Power at the PTO is lower — by how much, for this machine, nobody has measured.
- Weight
- 4,771 lb
- 3-point lift
- 1,819 lb
- Hyd. flow
- 6.0 gpm
- Top speed
- 13.7 mph
David Brown 990 Implematic specs: key facts
The David Brown 990 Implematic was built from 1961 to 1965.
The David Brown 990 Implematic has a claimed engine power (gross or net not stated) of 38.8 kW (52.0 hp); it has no measured PTO figure.
The David Brown 990 Implematic is two-wheel drive (2WD).
The David Brown 990 Implematic has a DAVID BROWN AD 4/47 A engine, a 4-cylinder 3.04 L diesel unit.
The David Brown 990 Implematic weighs 2,164 kg (4,771 lb) unladen.
The David Brown 990 Implematic has a rear PTO running at 540 rpm.
The three-point hitch of the David Brown 990 Implematic lifts 825 kg (1,819 lb) at the lower-link ends.
The hydraulic pump of the David Brown 990 Implematic delivers 22.7 L/min (6.0 gpm).
Source · Traktorenlexikon, “David Brown 990 Implematic”
How does the 990 Implematic compare with its class?
- Limitation:
A three-point lift at the lower links of 825 kg is low for its class — 55% below the median of 1,850 kg across the 204 machines within 10% of its power that hold this figure.
- Limitation:
Six forward gears is low for its class — 25% below the median of 8 across the 295 machines within 10% of its power that hold this figure.
Derived by WhichTractor from 300 comparable records. How we work this out
How much horsepower does a 990 Implematic have?
The only figure for the 990 Implematic is 52.0 hp (38.8 kW) of claimed engine power, gross or net not stated, no test standard stated — not power at the shaft.
Source · Traktorenlexikon, “David Brown 990 Implematic”
What engine is in a 990 Implematic?
A 990 Implematic has a DAVID BROWN AD 4/47 A, a 4-cylinder 3.04 L diesel engine.
| Make & model | DAVID BROWN AD 4/47 A |
|---|---|
| Cylinders | 4, liquid-cooled |
| Displacement | 185.8 ci · 3.04 L |
| Max torque | 141 lb·ft · 191 N·m @ 1,300 rpm |
| Electrical system | 12 V |
Source · Traktorenlexikon, “David Brown 990 Implematic”
How much will a 990 Implematic lift, and what is its hydraulic flow?
A 990 Implematic lifts 1,819 lb (825 kg) at the lower-link ends.
| Pump flow | 6.0 gpm · 22.7 L/min |
|---|---|
| Lift at ends | 1,819 lb · 825 kg |
| Rear PTO | 540 rpm @ 1,828 engine rpm |
Source · Traktorenlexikon, “David Brown 990 Implematic”
What transmission does a 990 Implematic have?
Transmission specifications for the 990 Implematic are below.
| Top speed | 13.7 mph · 22 km/h |
|---|
Source · Traktorenlexikon, “David Brown 990 Implematic”
How much does a 990 Implematic weigh?
A 990 Implematic weighs 4,771 lb (2,164 kg) unladen.
| Unladen weight | 4,771 lb · 2,164 kg |
|---|---|
| Wheelbase | 76.7–78.7 in · 1,948–1,999 mmthe article lists alternatives |
| Length | 118.0–121.0 in · 2,997–3,073 mmthe article lists alternatives |
| Width | 64.0 in · 1,626 mm |
| Height | 56.0 in · 1,422 mm |
| Ground clearance | 20.0 in · 508 mm |
| Front track | 52.0–76.0 in · 1,321–1,930 mmWikibooks gives one track for both axles |
| Rear track | 52.0–76.0 in · 1,321–1,930 mmWikibooks gives one track for both axles |
| Turning radius, braked | 10.5 ft · 3.20 m |
Source · Traktorenlexikon, “David Brown 990 Implematic”
What oil does a 990 Implematic take, and how much?
A 990 Implematic engine takes 7.8 qt (7.4 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.
| System | Capacity |
|---|---|
| Engine oil | 7.8 qt · 7.4 LSource: Traktorenlexikon, “David Brown 990 Implematic” · single source, not independently verified |
| Transmission | 16.8 qt · 15.9 LSource: Traktorenlexikon, “David Brown 990 Implematic” · single source, not independently verified |
| Cooling system | 14.4 qt · 13.6 LSource: Traktorenlexikon, “David Brown 990 Implematic” · single source, not independently verified |
Always confirm against the operator’s manual for your machine before service.
Which tractors compare with a 990 Implematic?
Within 10% of its 44.4 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.
- MAN 2R344 hp PTO, claimed · 1961–1962Side by side with the 990 Implematic →
- MAN 4R344 hp PTO, claimed · 1961–1962Side by side with the 990 Implematic →
- BOLINDER-MUNKTELL 350 Boxer44.4 hp PTO, claimed · 1959–1967Side by side with the 990 Implematic →
- J.I. Case 510-B44.4 hp PTO, claimed · 1958–1959Side by side with the 990 Implematic →
- J.I. Case 511-B44.4 hp PTO, claimed · 1958–1960Side by side with the 990 Implematic →
- Steyr 29044 hp PTO, claimed · 1966–1967Side by side with the 990 Implematic →
Common questions about the David Brown 990 Implematic
Is a 990 Implematic two-wheel drive or four-wheel drive?
The David Brown 990 Implematic is two-wheel drive (2WD).
What PTO does a 990 Implematic have?
A 990 Implematic has a 540 rpm rear PTO.
What serial numbers does a 990 Implematic carry?
The source prints serial numbers 440001 to 480600 for the type VAD-4/47 A (990 A) and VAD-4/47 B (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 Implematic”.
Sources
Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution
- Traktorenlexikon: David Brown 990 Implematic — CC BY-SA 4.0, WIKIBOOKS-TL-115966 · revision 1001700. Wikibooks contributors (Traktorenlexikon). Original document