- 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

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.
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.
| Make & model | INTERNATIONAL HARVESTER DT-436 |
|---|---|
| Cylinders | 6, liquid-cooledSource 1 |
| Displacement | 435.6 ci · 7.14 L |
| Electrical system | 12 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.
| Pump flow | 12.0 gpm · 45.5 L/minSource 3 |
|---|---|
| Lift at ends | 5,798 lb · 2,630 kg |
| Rear PTO | 1000 rpm |
| PTO shaft | 1 3/4"- 20 teilig |
Source · Traktorenlexikon, “Farmall Farmall 1566”
What transmission does a 1566 have?
Transmission specifications for the 1566 are below.
| Clutch | Pedal-operated ceramic clutchSource 3Sources disagreepedal-operated ceramic clutch (Traktorenlexikon, “Farmall Farmall 1566”) |
|---|---|
| Brakes | hydraulically operated disc brakes acting on differential side shafts |
| Top speed | 18.6 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.
| Unladen weight | 15,194 lb · 6,892 kg |
|---|---|
| Wheelbase | 104.8 in · 2,662 mmSource 3 |
| Length | 168.0 in · 4,267 mmSource 3 |
| Width | 112.0 in · 2,845 mm |
| Height | 125.0 in · 3,175 mmSource 3 |
| Ground clearance | 17.0 in · 432 mm |
| Front track | 60.1–86.5 in · 1,527–2,197 mmSource 3 |
| Rear track | 62.0–120.0 in · 1,575–3,048 mm |
| Turning radius, braked | 11.9 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.
| System | Capacity |
|---|---|
| Engine oil | 14.1 qt · 13.3 LSource: Traktorenlexikon, “Farmall Farmall 1566” · single source, not independently verified |
| Transmission & hydraulic | 88.0 qt · 83.3 LSource: Traktorenlexikon, “Farmall Farmall 1566” · single source, not independently verified |
| Cooling system | 26.0 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.
- International Harvester 3788166.4 hp PTO, claimed · 1979–1981Side by side with the 1566 →
- International Harvester 6788166.4 hp PTO, claimed · 1981–1984Side by side with the 1566 →
- International Harvester 1586156.1 hp PTO, claimed · 1976–1981Side by side with the 1566 →
- International Harvester 4166152.7 hp PTO, claimed · 1972–1976Side by side with the 1566 →
- Massey Ferguson 1505172.1 hp PTO, claimed · 1975–1977Side by side with the 1566 →
- International Harvester 6588152.1 hp PTO, claimed · 1978–1981Side by side with the 1566 →
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
Facts taken from these documents, units converted. Numbers beside a figure refer to this list. Licences and attribution
- Traktorenlexikon: Farmall Farmall 1566 — CC BY-SA 4.0, WIKIBOOKS-TL-118931 · revision 1035372. Wikibooks contributors (Traktorenlexikon). Original document
- Traktorenlexikon: IHC 1466 — CC BY-SA 4.0, WIKIBOOKS-TL-118879 · revision 1055412. Wikibooks contributors (Traktorenlexikon). Original document
- Traktorenlexikon: IHC 1566 — CC BY-SA 4.0, WIKIBOOKS-TL-118930 · revision 1055414. Wikibooks contributors (Traktorenlexikon). Original document