- Rigid chassis
- WhichTractor size: Standard-size
- No lab test on file
- 1957–1958
- 5,444 built
It was ranked on an engine power figure whose source does not say gross or net. 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 900 specs: hp, weight, years
DAVID BROWN AK-4/30 J or AG-4/30 J four-cylinder. The manufacturer claimed 40.1 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.
Engine power, claimed · gross or net not stated
40.1 hp
29.9 kW as stated by the source
No lab test on file
Claimed · standard not stated by the source
Source · Traktorenlexikon, “David Brown 900”, 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
- 3,999 lb
- 3-point lift
- 1,799 lb
- Hyd. flow
- 10.7 gpm
- Top speed
- 15.5 mph
David Brown 900 specs: key facts
The David Brown 900 was built from 1957 to 1958.
The David Brown 900 has a claimed engine power (gross or net not stated) of 29.9 kW (40.1 hp); it has no measured PTO figure.
The David Brown 900 is two-wheel drive (2WD).
The David Brown 900 has a DAVID BROWN AK-4/30 J or AG-4/30 J engine, a 4-cylinder 2.71 L unit.
The David Brown 900 weighs 1,814 kg (3,999 lb) unladen.
The David Brown 900 has a rear PTO running at 540 rpm.
The three-point hitch of the David Brown 900 lifts 816 kg (1,799 lb) at the lower-link ends.
The hydraulic pump of the David Brown 900 delivers 40.5 L/min (10.7 gpm).
Source · Traktorenlexikon, “David Brown 900”
How does the 900 compare with its class?
- Limitation:
A three-point lift at the lower links of 816 kg is low for its class — 37% below the median of 1,300 kg across the 95 machines within 10% of its power that hold this figure.
- Strength:
A hydraulic pump flow of 40.5 L/min is high for its class — 86% above the median of 21.8 L/min across the 136 machines within 10% of its power that hold this figure.
Derived by WhichTractor from 176 comparable records. How we work this out
How much horsepower does a 900 have?
The only figure for the 900 is 40.1 hp (29.9 kW) of claimed engine power, gross or net not stated, no test standard stated — not power at the shaft.
Source · Traktorenlexikon, “David Brown 900”
What engine is in a 900?
A 900 has a DAVID BROWN AK-4/30 J or AG-4/30 J, a 4-cylinder 2.71 L engine.
| Make & model | DAVID BROWN AK-4/30 J or AG-4/30 J |
|---|---|
| Cylinders | 4, liquid-cooled |
| Displacement | 165.2 ci · 2.71 L |
Source · Traktorenlexikon, “David Brown 900”
How much will a 900 lift, and what is its hydraulic flow?
A 900 lifts 1,799 lb (816 kg) at the lower-link ends.
| Pump flow | 10.7 gpm · 40.5 L/min |
|---|---|
| Pressure | 1,493 psi · 103 bar |
| Lift at ends | 1,799 lb · 816 kg |
| Rear PTO | transmission-driven, 540 rpm |
| PTO shaft | 1 3/8" - 6 splines |
Source · Traktorenlexikon, “David Brown 900”
What transmission does a 900 have?
Transmission specifications for the 900 are below.
| Clutch | Pedal-operated dry BORG & BECK single-plate clutch |
|---|---|
| Steering | Mechanical steering |
| Top speed | 15.5 mph · 25 km/h |
Source · Traktorenlexikon, “David Brown 900”
How much does a 900 weigh?
A 900 weighs 3,999 lb (1,814 kg) unladen.
| Unladen weight | 3,999 lb · 1,814 kgD: 1,860 |
|---|---|
| Wheelbase | 75.2 in · 1,911 mm |
| Length | 116.3 in · 2,953 mm |
| Width | 48.5–65.0 in · 1,231–1,651 mm |
| Height | 54.5 in · 1,384 mm |
| Ground clearance | 16.0 in · 406 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 | 9.6 ft · 2.91 m |
Source · Traktorenlexikon, “David Brown 900”
What oil does a 900 take, and how much?
A 900 engine takes 8.5 qt (8.0 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.
| System | Capacity |
|---|---|
| Engine oil | 8.5 qt · 8.0 LSource: Traktorenlexikon, “David Brown 900” · single source, not independently verified |
| Transmission | 19.2 qt · 18.2 LSource: Traktorenlexikon, “David Brown 900” · single source, not independently verified |
| Cooling system | 16.8 qt · 15.9 LSource: Traktorenlexikon, “David Brown 900” · single source, not independently verified |
Always confirm against the operator’s manual for your machine before service.
Which tractors compare with a 900?
Within 10% of its 40.1 hp of claimed engine power, the same type, and first built within 15 years of it.
- Nuffield 3/42 (342)39.8 hp engine, claimed · 1961–1964Side by side with the 900 →
- SOMECA SOM-3540.5 hp engine, claimed · 1960–1963Side by side with the 900 →
- SOMECA SOM-35 DS/DE40.5 hp engine, claimed · 1961–1963Side by side with the 900 →
- SOMECA SOM-35 GD40.5 hp engine, claimed · 1961–1963Side by side with the 900 →
- SOMECA SOM-41140.5 hp engine, claimed · 1964–1965Side by side with the 900 →
- SOMECA SOM-431 V/E40.5 hp engine, claimed · 1964–1965Side by side with the 900 →
Common questions about the David Brown 900
Is a 900 two-wheel drive or four-wheel drive?
The David Brown 900 is two-wheel drive (2WD).
What PTO does a 900 have?
A 900 has a 540 rpm rear PTO on a 1 3/8" - 6 splines shaft.
What serial numbers does a 900 carry?
The source prints serial numbers 10001 to 10305 for the type VAG-1 H/30 (900 petrol) (November 1956 to May 1958). 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 900”.
Sources
Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution
- Traktorenlexikon: David Brown 900 — CC BY-SA 4.0, WIKIBOOKS-TL-115939 · revision 1001698. Wikibooks contributors (Traktorenlexikon). Original document