WhichTractor
  • Rigid chassis
  • WhichTractor size: Standard-size
  • No lab test on file
  • 1958–1962
  • 26,668 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 950 (Implematic) specs: hp, weight, years

DAVID BROWN AK 4/40 T or AG 4/40 T four-cylinder. The manufacturer claimed 42.5 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.

Engine power, claimed · gross or net not stated

42.5 hp

31.7 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “David Brown 950”, 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
4,189 lb
3-point lift
1,801 lb
Hyd. flow
7.4 gpm
Top speed
12.4 mph

David Brown 950 (Implematic) specs: key facts

  • The David Brown 950 (Implematic) was built from 1958 to 1962.

  • The David Brown 950 (Implematic) has a claimed engine power (gross or net not stated) of 31.7 kW (42.5 hp); it has no measured PTO figure.

  • The David Brown 950 (Implematic) is two-wheel drive (2WD).

  • The David Brown 950 (Implematic) has a DAVID BROWN AK 4/40 T or AG 4/40 T engine, a 4-cylinder 2.71 L unit.

  • The David Brown 950 (Implematic) weighs 1,900 kg (4,189 lb) unladen.

  • The David Brown 950 (Implematic) has a rear PTO running at 540/1000 rpm.

  • The three-point hitch of the David Brown 950 (Implematic) lifts 817 kg (1,801 lb) at the lower-link ends.

  • The hydraulic pump of the David Brown 950 (Implematic) delivers 28.0 L/min (7.4 gpm).

Source · Traktorenlexikon, “David Brown 950”

How does the 950 (Implematic) compare with its class?

  • Limitation:

    A three-point lift at the lower links of 817 kg is low for its class — 44% below the median of 1,450 kg across the 157 machines within 10% of its power that hold this figure.

Derived by WhichTractor from 255 comparable records. How we work this out

Illustration of the 1958–1962 David Brown 950 (Implematic), a 43 hp farm tractor, a drawing generated from its specification record
Illustration — not a photograph

How much horsepower does a 950 (Implematic) have?

The only figure for the 950 (Implematic) is 42.5 hp (31.7 kW) of claimed engine power, gross or net not stated, no test standard stated — not power at the shaft.

Engine, claimed (gross/net not stated)
42.5 hp

Source · Traktorenlexikon, “David Brown 950”

What engine is in a 950 (Implematic)?

A 950 (Implematic) has a DAVID BROWN AK 4/40 T or AG 4/40 T, a 4-cylinder 2.71 L engine.

Engine — 950 (Implematic) engine specifications
Make & modelDAVID BROWN AK 4/40 T or AG 4/40 T
Cylinders4, liquid-cooled
Displacement165.2 ci · 2.71 L
Electrical system12 V

Source · Traktorenlexikon, “David Brown 950”

How much will a 950 (Implematic) lift, and what is its hydraulic flow?

A 950 (Implematic) lifts 1,801 lb (817 kg) at the lower-link ends.

Hydraulics & PTO — 950 (Implematic) hydraulics and PTO specifications
Pump flow7.4 gpm · 28.0 L/min
Lift at ends1,801 lb · 817 kg
Rear PTOtransmission-driven, 540/1000 rpm @ 1,800 engine rpm

Source · Traktorenlexikon, “David Brown 950”

What transmission does a 950 (Implematic) have?

Transmission specifications for the 950 (Implematic) are below.

Transmission — 950 (Implematic) transmission specifications
ClutchPedal-operated dry BORG & BECK single-plate clutch
SteeringMechanical recirculating ball steering
Top speed12.4 mph · 20 km/h

Source · Traktorenlexikon, “David Brown 950”

How much does a 950 (Implematic) weigh?

A 950 (Implematic) weighs 4,189 lb (1,900 kg) unladen.

Weights & dimensions — 950 (Implematic) weights and dimensions
Unladen weight4,189 lb · 1,900 kg
Wheelbase76.7 in · 1,948 mm
Length118.0 in · 2,997 mm
Width64.0 in · 1,626 mm
Height54.8 in · 1,391 mm
Ground clearance15.9 in · 404 mm
Front track52.0–76.0 in · 1,321–1,930 mmWikibooks gives one track for both axles
Rear track52.0–76.0 in · 1,321–1,930 mmWikibooks gives one track for both axles
Turning radius, braked10.1 ft · 3.08 m

Source · Traktorenlexikon, “David Brown 950”

What oil does a 950 (Implematic) take, and how much?

A 950 (Implematic) engine takes 8.5 qt (8.0 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.

950 (Implematic) fluid capacities, grades and service intervals
SystemCapacity
Engine oil8.5 qt · 8.0 LSource: Traktorenlexikon, “David Brown 950” · single source, not independently verified
Transmission19.2 qt · 18.2 LSource: Traktorenlexikon, “David Brown 950” · single source, not independently verified
Cooling system16.8 qt · 15.9 LSource: Traktorenlexikon, “David Brown 950” · single source, not independently verified

Always confirm against the operator’s manual for your machine before service.

Which tractors compare with a 950 (Implematic)?

Within 10% of its 36.7 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.

Common questions about the David Brown 950 (Implematic)

Is a 950 (Implematic) two-wheel drive or four-wheel drive?

The David Brown 950 (Implematic) is two-wheel drive (2WD).

What PTO does a 950 (Implematic) have?

A 950 (Implematic) has a 540/1000 rpm rear PTO.

What serial numbers does a 950 (Implematic) carry?

The source prints serial numbers 55446 to 62500 for the type VAD 1 T/ 1 U, VAK 1 T/ 1 U and VAG 1 T/ 1 U (November 1958 to September 1959). 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 950”.

Sources checked

14 SEP 2026

Spotted an error?

Sources

Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution

  1. Traktorenlexikon: David Brown 950 — CC BY-SA 4.0, WIKIBOOKS-TL-115953 · revision 1001699. Wikibooks contributors (Traktorenlexikon). Original document