• Rigid chassis
  • WhichTractor size: Standard-size
  • No lab test on file
  • 1955–1961
  • 2,224 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

Fahr D 400B specs: hp, weight, years

KHD F3L 514 three-cylinder diesel. The manufacturer claimed 44.4 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.

Engine power, claimed · gross or net not stated

44.4 hp

33.1 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “Fahr D 400 B”, 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
6,217 lb
Hyd. flow
4.9 gpm
Top speed
12.4–18.6 mph

Fahr D 400B specs: key facts

  • The Fahr D 400B was built from 1955 to 1961.

  • The Fahr D 400B has a claimed engine power (gross or net not stated) of 33.1 kW (44.4 hp); it has no measured PTO figure.

  • The Fahr D 400B is two-wheel drive (2WD).

  • The Fahr D 400B has a KHD F3L 514 engine, a 3-cylinder 3.99 L diesel unit.Source 2

  • The Fahr D 400B weighs 2,820 kg (6,217 lb) unladen.

  • The Fahr D 400B has a dependent rear PTO running at 588 rpm.

  • The hydraulic pump of the Fahr D 400B delivers 18.5 L/min (4.9 gpm).

Source · Traktorenlexikon, “Fahr D 400 B”

How does the D 400B compare with its class?

  • Strength:

    A maximum engine torque of 223 N·m is high for its class — 41% above the median of 158 N·m across the 203 machines within 10% of its power that hold this figure.

  • Limitation:

    Five forward gears is low for its class — 38% below the median of 8 across the 269 machines within 10% of its power that hold this figure.

  • Worth knowing:

    An unladen mass of 2,820 kg is high for its class — 40% above the median of 2,020 kg across the 271 machines within 10% of its power that hold this figure.

Derived by WhichTractor from 272 comparable records. How we work this out

Illustration of the 1955–1961 Fahr D 400 B, a 44 hp farm tractor, cab was optional — shown without it, a drawing generated from its specification record
Illustration — not a photograph · cab was optional — shown without it

How much horsepower does a D 400B have?

The only figure for the D 400B is 44.4 hp (33.1 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)
44.4 hp

Source · Traktorenlexikon, “Fahr D 400 B”

What engine is in a D 400B?

A D 400B has a KHD F3L 514, a 3-cylinder 3.99 L diesel engine.

Engine — D 400B engine specifications
Make & modelKHD F3L 514Source 2
Cylinders3, air-cooledSource 2
Displacement243.5 ci · 3.99 LSource 2
Max torque164 lb·ft · 223 N·m @ 1,100 rpm
Electrical system12 V

Source · Traktorenlexikon, “Fahr D 400 B”

How much will a D 400B lift, and what is its hydraulic flow?

Hydraulic and PTO specifications for the D 400B are below.

Hydraulics & PTO — D 400B hydraulics and PTO specifications
Pump flow4.9 gpm · 18.5 L/min
Rear PTODependent, transmission-driven, 588 rpm
PTO shaft29 x 34,9 x 8,7 mm

Source · Traktorenlexikon, “Fahr D 400 B”

What transmission does a D 400B have?

Transmission specifications for the D 400B are below.

Transmission — D 400B transmission specifications
ClutchPedal operated dry Fichtel & Sachs single-plate clutch
SteeringZF single-wheel steering, type 682
Top speed12.4–18.6 mph · 20–30 km/hthe article lists alternatives

Source · Traktorenlexikon, “Fahr D 400 B”

How much does a D 400B weigh?

A D 400B weighs 6,217 lb (2,820 kg) unladen.

Weights & dimensions — D 400B weights and dimensions
Unladen weight6,217 lb · 2,820 kg
Maximum permissible mass8,818 lb · 4,000 kg
Maximum front axle load3,086 lb · 1,400 kg
Maximum rear axle load5,952 lb · 2,700 kg
Wheelbase91.3 in · 2,320 mm
Length143.7 in · 3,650 mm
Width87.8 in · 2,230 mm
Height92.9 in · 2,360 mm
Ground clearance13.5 in · 343 mm
Front track59.1–74.8 in · 1,500–1,900 mm
Rear track59.1–75.7 in · 1,500–1,924 mm
Turning radius, braked12.6 ft · 3.85 m

Source · Traktorenlexikon, “Fahr D 400 B”

What oil does a D 400B take, and how much?

A D 400B engine takes 9.5 qt (9 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.

D 400B fluid capacities, grades and service intervals
SystemCapacity
Engine oil9.5 qt · 9 LSource: Traktorenlexikon, “Fahr D 400 B” · single source, not independently verified
Transmission0.4 qt · 0.4 LSource: Traktorenlexikon, “Fahr D 400 B” · single source, not independently verified
Hydraulic3.7 qt · 3.5 LSource: Traktorenlexikon, “Fahr D 400 B” · single source, not independently verified

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

Which tractors compare with a D 400B?

Within 10% of its 42 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 Fahr D 400B

Is a D 400B two-wheel drive or four-wheel drive?

The Fahr D 400B is two-wheel drive (2WD).

What PTO does a D 400B have?

A D 400B has a dependent 588 rpm rear PTO on a 29 x 34,9 x 8,7 mm shaft.

Sources and how this page was built

Compiled from Traktorenlexikon, “Fahr D 45 L”; and Traktorenlexikon, “Fahr D 400 B”.

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: Fahr D 400 B — CC BY-SA 4.0, WIKIBOOKS-TL-43358 · revision 956438. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: Fahr D 45 L — CC BY-SA 4.0, WIKIBOOKS-TL-43354 · revision 1078527. Wikibooks contributors (Traktorenlexikon). Original document