• WhichTractor size: Standard-size
  • No lab test on file
  • 1971–1976
  • 54,947 built

It sits on the standard-size/high-power boundary, so either size is a fair description. WhichTractor size, not the maker’s category

Derived by WhichTractor from a sourced three-point linkage. How we decide what a machine is

International Harvester Farmall 1066 specs: hp, weight, years

INTERNATIONAL HARVESTER DT-414 six-cylinder diesel. The manufacturer claimed 115.5 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.

Engine power, claimed · gross or net not stated

115.5 hp

86.1 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “IHC 1066”, 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
12,145 lb
3-point lift
5,798 lb
Hyd. flow
12.0 gpm
Top speed
18.6 mph

International Harvester Farmall 1066 specs: key facts

  • The International Harvester Farmall 1066 was built from 1971 to 1976.Source 1

  • The International Harvester Farmall 1066 has a claimed engine power (gross or net not stated) of 86.1 kW (115.5 hp); it has no measured PTO figure.

  • The International Harvester Farmall 1066 is two-wheel drive (2WD).Source 1

  • The International Harvester Farmall 1066 has a INTERNATIONAL HARVESTER DT-414 engine, a 6-cylinder 6.78 L diesel unit.

  • The International Harvester Farmall 1066 weighs 5,509 kg (12,145 lb) unladen.

  • The International Harvester Farmall 1066 has a rear PTO running at 540/1000 rpm.

  • The three-point hitch of the International Harvester Farmall 1066 lifts 2,630 kg (5,798 lb) at the lower-link ends.Source 1

  • The hydraulic pump of the International Harvester Farmall 1066 delivers 45.5 L/min (12.0 gpm).

Source · Traktorenlexikon, “IHC 1066”

How does the Farmall 1066 compare with its class?

  • Limitation:

    A three-point lift at the lower links of 2,630 kg is low for its class — 50% below the median of 5,213 kg across the 182 machines within 10% of its power that hold this figure.

  • Limitation:

    Eight forward gears is low for its class — 50% below the median of 16 across the 236 machines within 10% of its power that hold this figure.

  • Limitation:

    The power figure is a manufacturer claim, not a measurement. No laboratory test report exists for this machine. Of the 262 tractors within 10% of its power, 11% carry one.

Derived by WhichTractor from 262 comparable records. How we work this out

International Harvester Farmall 1066 tractor
Photo: Acroterion, CC BY-SA 4.0 via Wikimedia Commons · Wrong photo?

How much horsepower does a Farmall 1066 have?

The only figure for the Farmall 1066 is 115.5 hp (86.1 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)
115.5 hp

Source · Traktorenlexikon, “IHC 1066”

What engine is in a Farmall 1066?

A Farmall 1066 has an INTERNATIONAL HARVESTER DT-414, a 6-cylinder 6.78 L diesel engine.

Engine — Farmall 1066 engine specifications
Make & modelINTERNATIONAL HARVESTER DT-414
Cylinders6, liquid-cooledSource 1
Displacement413.9 ci · 6.78 L
Electrical system12 V

Source · Traktorenlexikon, “IHC 1066”

How much will a Farmall 1066 lift, and what is its hydraulic flow?

A Farmall 1066 lifts 5,798 lb (2,630 kg) at the lower-link ends.

Hydraulics & PTO — Farmall 1066 hydraulics and PTO specifications
Pump flow12.0 gpm · 45.5 L/minSource 2
Lift at ends5,798 lb · 2,630 kg
Rear PTO540/1000 rpm @ 2,100 engine rpmSource 2

Source · Traktorenlexikon, “Farmall Farmall 1066”

What transmission does a Farmall 1066 have?

Transmission specifications for the Farmall 1066 are below.

Transmission — Farmall 1066 transmission specifications
Top speed18.6 mph · 30 km/h

Source · Traktorenlexikon, “IHC 1066”

How much does a Farmall 1066 weigh?

A Farmall 1066 weighs 12,145 lb (5,509 kg) unladen.

Weights & dimensions — Farmall 1066 weights and dimensions
Unladen weight12,145 lb · 5,509 kg
Wheelbase104.8 in · 2,662 mmSource 1
Length165.0 in · 4,191 mmSource 1
Width98.0 in · 2,489 mmSource 1
Height111.0 in · 2,819 mm
Ground clearance16.0 in · 406 mm
Front track62.0–86.0 in · 1,575–2,184 mm
Rear track60.0–94.0 in · 1,524–2,388 mmSource 1
Turning radius, braked12.0 ft · 3.66 m

Source · Traktorenlexikon, “IHC 1066”

What oil does a Farmall 1066 take, and how much?

A Farmall 1066 engine takes 18.0 qt (17.0 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.

Farmall 1066 fluid capacities, grades and service intervals
SystemCapacity
Engine oil18.0 qt · 17.0 LSource: Traktorenlexikon, “IHC 1066” · single source, not independently verified
Transmission & hydraulic90.0 qt · 85.2 LSource: Traktorenlexikon, “Farmall Farmall 1066” · single source, not independently verified
Cooling system25.0 qt · 23.7 LSource: Traktorenlexikon, “IHC 1066” · single source, not independently verified

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

Which tractors compare with a Farmall 1066?

Within 10% of its 112.1 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 International Harvester Farmall 1066

Is a Farmall 1066 two-wheel drive or four-wheel drive?

The International Harvester Farmall 1066 is two-wheel drive (2WD).

What PTO does a Farmall 1066 have?

A Farmall 1066 has a 540/1000 rpm rear PTO.

Sources and how this page was built

Compiled from Traktorenlexikon, “IHC 1066”; and Traktorenlexikon, “Farmall Farmall 1066”.

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: Farmall Farmall 1066 — CC BY-SA 4.0, WIKIBOOKS-TL-118877 · revision 1054932. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: IHC 1066 — CC BY-SA 4.0, WIKIBOOKS-TL-118876 · revision 1055406. Wikibooks contributors (Traktorenlexikon). Original document