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Tractor · 1974Unverified

International Harvester 1566

Name: International Harvester 1566
Brand: International Harvester

International Harvester 1566 — 66 Series · 161 hp. Reference specifications; pending source verification.

The International Harvester 1566 is a tractor with a rating of 161 horsepower, positioning it within the higher-powered category of its class. Manufactured between 1974 and 1976, this tractor features a 6-cylinder turbocharged diesel liquid-cooled engine, coupled with a powershift transmission and two-wheel drive configuration. The listed weight for this model ranges from 13200 to 15195 pounds. It is designed for tasks involving approximately 600–1,500 acres.

Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.

Rated power

161 hp

Max power

102.2 kW

Weight

13200 to 15195 pounds

Catalogue coverage

Variants represented

Richest spec table

77 rows

Recorded power

161 hp

Transmissions

12-speed two-speed power shift

Production years

1974-1976

Verified variants

No linked source document is currently displayed; verify critical figures with the manufacturer or dealer.

Hover a source tag to verify

Overview

ManufacturerInternational HarvesterReference

Row-Crop tractorReference

Built in Rock Island, Illinois, USAReference

Total built7,417Reference

Original price was $26,250 in 1976Reference

Two-wheel driveReference

Final drivesplanetaryReference

Power steeringReference

Hydraulic wet disc brakesReference

Open operator station. Cab available with air-conditioning.Reference

Engine

International Harvester 7.1L 6-cyl dieselReference

Fuel tank159.0 LReference

Fuel tank310.4 LReference

Engine136.5 kWReference

Drawbar (tested)102.2 kWReference

International Harvester DT-436Reference

turbocharged dieselReference

6-cylinderReference

liquid-cooledReference

Displacement7.1 LReference

Bore/Stroke109 x 127 mmReference

Power136.5 kWReference

Compression16:1Reference

Rated RPM2600Reference

Idle RPM900-2600Reference

Oil capacity18.9 LReference

Coolant capacity24.6 LReference

Power at rated engine speed120.1 kWReference

Max power102.2 kWReference

Transmission

12-speed two-speed power shiftReference

TransmissionTorque AmplifierReference

Typetwo-speed power shiftReference

Gears12 forward and 6 reverseReference

PTO & Hydraulics

PTO (claimed)119.3 kWReference

PTO (tested)120.1 kWReference

Typeopen centerReference

Rear valves2Reference

Front valves2Reference

Pump flow45.4 lpmReference

Rear TypeIII/IIReference

Controllower-link draft sensingReference

Rear PTOindependentReference

Rear PTO Type1000Reference

Engine RPM1000@2300Reference

Power at rated PTO speed121.0 kWReference

Dimensions

Wheelbase266 cmReference

Weight13200 to 15195 poundsReference

Front tire11L-15Reference

Rear tire20.8-38Reference

Ag front11L-15Reference

Ag rear20.8-38Reference

Length426 cmReference

Width284 cmReference

Height (cab)297 cmReference

Height (exhaust)317 cmReference

Clearance (drawbar)43 cmReference

Bar rear axle101 mmReference

Front tread157 to 218 cmReference

Front tread142 to 203 cmReference

Rear tread167 to 304 cmReference

Shipping5987 kgReference

Operating6892 kgReference

Ballasted8282 kgReference

1566 Serial Numbers

Location:Serial number plate on the left side of the clutch housing.Reference

19747101Reference

19757837Reference

197612589Reference

FAQ: How to read a serial number table.Reference

Electrical

Charging systemalternatorReference

Test results

Diesel Torque Amplifier 2WDMay 3 - 15, 1975Link: Nebraska Tractor Test 1174 fileReference

PTO performanceReference

Fuel use42.0 l/hourReference

Fuel use37.9 l/hourReference

Drawbar performanceReference

Fuel use41.3 l/hourReference

Max pull7155 kgReference

Speeds

With 20.8-38 rear tires.Reference

Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.

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