• WhichTractor size: High-power
  • No lab test on file
  • 1974–1976
  • 7,417 built

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 1566 specs: hp, weight, years

INTERNATIONAL HARVESTER DT-436 six-cylinder diesel. The manufacturer claimed 161 horsepower. No laboratory has tested one, so there is no measured figure at the shaft.

Engine power, claimed · gross or net not stated

161 hp

120 kW as stated by the source

No lab test on file

Claimed · standard not stated by the source

Source · Traktorenlexikon, “Farmall Farmall 1566”, 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
15,194 lb
3-point lift
5,798 lb
Hyd. flow
12.0 gpm
Top speed
18.6 mph

International Harvester 1566 specs: key facts

  • The International Harvester 1566 was built from 1974 to 1976.Source 3

  • The International Harvester 1566 has a claimed engine power (gross or net not stated) of 120 kW (161 hp); it has no measured PTO figure.

  • The International Harvester 1566 was offered in two-wheel-drive and four-wheel-drive versions.Source 3

  • The International Harvester 1566 has a INTERNATIONAL HARVESTER DT-436 engine, a 6-cylinder 7.14 L diesel unit.Source 2

  • The International Harvester 1566 weighs 6,892 kg (15,194 lb) unladen.

  • The International Harvester 1566 has a rear PTO running at 1000 rpm.

  • The three-point hitch of the International Harvester 1566 lifts 2,630 kg (5,798 lb) at the lower-link ends.

  • The hydraulic pump of the International Harvester 1566 delivers 45.5 L/min (12.0 gpm).Source 3

Source · Traktorenlexikon, “Farmall Farmall 1566”

How does the 1566 compare with its class?

  • Limitation:

    A three-point lift at the lower links of 2,630 kg is low for its class — 61% below the median of 6,680 kg across the 113 machines within 10% of its power that hold this figure.

  • Limitation:

    A hydraulic pump flow of 45.5 L/min is low for its class — 45% below the median of 83 L/min across the 133 machines within 10% of its power that hold this figure.

  • Limitation:

    Six forward gears is low for its class — 67% below the median of 18 across the 152 machines within 10% of its power that hold this figure.

  • Limitation:

    A 159 L fuel tank is low for its class — 47% below the median of 300 L across the 162 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 168 tractors within 10% of its power, 10% carry one.

Derived by WhichTractor from 168 comparable records. How we work this out

International Harvester 1566 tractor
Photo: Acroterion, CC BY-SA 4.0 via Wikimedia Commons · Wrong photo?

How much horsepower does a 1566 have?

The only figure for the 1566 is 161 hp (120 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)
161 hp

Source · Traktorenlexikon, “Farmall Farmall 1566”

What engine is in a 1566?

A 1566 has an INTERNATIONAL HARVESTER DT-436, a 6-cylinder 7.14 L diesel engine.

Engine — 1566 engine specifications
Make & modelINTERNATIONAL HARVESTER DT-436
Cylinders6, liquid-cooledSource 1
Displacement435.6 ci · 7.14 L
Electrical system12 VSource 3

Source · Traktorenlexikon, “IHC 1466”

How much will a 1566 lift, and what is its hydraulic flow?

A 1566 lifts 5,798 lb (2,630 kg) at the lower-link ends.

Hydraulics & PTO — 1566 hydraulics and PTO specifications
Pump flow12.0 gpm · 45.5 L/minSource 3
Lift at ends5,798 lb · 2,630 kg
Rear PTO1000 rpm
PTO shaft1 3/4"- 20 teilig

Source · Traktorenlexikon, “Farmall Farmall 1566”

What transmission does a 1566 have?

Transmission specifications for the 1566 are below.

Transmission — 1566 transmission specifications
ClutchPedal-operated ceramic clutchSource 3Sources disagreepedal-operated ceramic clutch (Traktorenlexikon, “Farmall Farmall 1566”)
Brakeshydraulically operated disc brakes acting on differential side shafts
Top speed18.6 mph · 30 km/h

Source · Traktorenlexikon, “Farmall Farmall 1566”

How much does a 1566 weigh?

A 1566 weighs 15,194 lb (6,892 kg) unladen.

Weights & dimensions — 1566 weights and dimensions
Unladen weight15,194 lb · 6,892 kg
Wheelbase104.8 in · 2,662 mmSource 3
Length168.0 in · 4,267 mmSource 3
Width112.0 in · 2,845 mm
Height125.0 in · 3,175 mmSource 3
Ground clearance17.0 in · 432 mm
Front track60.1–86.5 in · 1,527–2,197 mmSource 3
Rear track62.0–120.0 in · 1,575–3,048 mm
Turning radius, braked11.9 ft · 3.63 m

Source · Traktorenlexikon, “Farmall Farmall 1566”

What oil does a 1566 take, and how much?

A 1566 engine takes 14.1 qt (13.3 L). Single source, not independently verified — always confirm against the operator’s manual for your machine.

1566 fluid capacities, grades and service intervals
SystemCapacity
Engine oil14.1 qt · 13.3 LSource: Traktorenlexikon, “Farmall Farmall 1566” · single source, not independently verified
Transmission & hydraulic88.0 qt · 83.3 LSource: Traktorenlexikon, “Farmall Farmall 1566” · single source, not independently verified
Cooling system26.0 qt · 24.6 LSource: Traktorenlexikon, “IHC 1566” · single source, not independently verified

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

Which tractors compare with a 1566?

Within 10% of its 162.3 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 1566

Is a 1566 two-wheel drive or four-wheel drive?

The International Harvester 1566 was offered in two-wheel-drive and four-wheel-drive versions.

What PTO does a 1566 have?

A 1566 has a 1000 rpm rear PTO on a 1 3/4"- 20 teilig shaft.

Sources and how this page was built

Compiled from Traktorenlexikon, “IHC 1466”; Traktorenlexikon, “IHC 1566”; and Traktorenlexikon, “Farmall Farmall 1566”.

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 1566 — CC BY-SA 4.0, WIKIBOOKS-TL-118931 · revision 1035372. Wikibooks contributors (Traktorenlexikon). Original document
  2. Traktorenlexikon: IHC 1466 — CC BY-SA 4.0, WIKIBOOKS-TL-118879 · revision 1055412. Wikibooks contributors (Traktorenlexikon). Original document
  3. Traktorenlexikon: IHC 1566 — CC BY-SA 4.0, WIKIBOOKS-TL-118930 · revision 1055414. Wikibooks contributors (Traktorenlexikon). Original document