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Tractor · 1971Unverified

International Harvester 1066

Name: International Harvester 1066
Brand: International Harvester

International Harvester 1066 — 66 Series · 116 hp. Reference specifications; pending source verification.

The International Harvester 1066 is a tractor rated at approximately 116 horsepower, a mid-range figure for its class. It was produced between 1971 and 1976. The tractor is equipped with a 6-cylinder turbocharged diesel liquid-cooled engine and features four-wheel drive with a hydrostatic transmission. Its operating weight ranges from 12148 to 13345 pounds, making it suitable for operations spanning 200 to 800 acres.

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

Rated power

116 hp

Max power

74.9 kW

Weight

12148 to 13345 pounds

Catalogue coverage

Variants represented

Richest spec table

108 rows

Recorded power

116 hp

Transmissions

8-speed gear

Production years

1971-1976

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 built54,947Reference

Original price was $21,100 in 1976Reference

The hydrostatic drive 1066 Hydro was later renamed the Hydro 100. This was due to confusion over drawbar horsepower. The hydrostatic drive took a lot of power to operate, and the 1066 Hydro had much less power than a gear-driven 1066. Torque Amplifer (TA) was optional. The 1066 engine was altered in 1973 to increase horsepower.Reference

Two- or four-wheel driveReference

Power steeringReference

Hydraulic dry disc brakesReference

Open operator station. Two-post fixed ROPS available. Cab available with optional air-conditioning.Reference

Variants

1066 Hi-Clearhigh-cropReference

Engine

International Harvester 6.8L 6-cyl dieselReference

Fuel tank159.0 LReference

Drawbar (claimed)80.5 kWReference

Drawbar (tested)79.0 kWReference

International Harvester DT414Reference

turbocharged dieselReference

6-cylinderReference

liquid-cooledReference

Displacement6.8 LReference

Bore/Stroke109 x 121 mmReference

Air cleanerdual stage dryReference

Rated RPM2400Reference

Rated RPM2600 (after 1973)Reference

Starter volts12Reference

Oil capacity17.0 LReference

Coolant capacity23.7 LReference

Power at rated engine speed86.7 kWReference

Max power74.9 kWReference

Power at rated engine speed84.7 kWReference

Max power63.3 kWReference

Power at rated engine speed93.7 kWReference

Max power79.0 kWReference

Transmission

8-speed gearReference

16-speed two-speed power shiftReference

hydrostaticReference

TypegearReference

Gears8 forward and 4 reverseReference

Clutchdry discReference

Four gears each in high, low, and reverse ranges.Reference

TransmissionTorque AmplifierReference

Typetwo-speed power shiftReference

Gears16 forward and 8 reverseReference

Four gears (1-4) in two ranges (Low/High) with the two-speed Torque Amplifier power shift (TA/direct).Reference

TypehydrostaticReference

Gearsinfinite forward and reverse (two-range)Reference

PTO & Hydraulics

PTO (claimed)94.0 kWReference

PTO (tested)93.7 kWReference

Typeopen centerReference

Pump flow45.4 lpmReference

Total flow79.5 lpmReference

Steering flow34.1 lpmReference

Rear TypeIII/IIReference

Rear lift (at 24"/610mm)2540 kgReference

Rear PTOindependentReference

Rear PTO Type540/1000Reference

Power at rated PTO speed83.7 kWReference

Power at rated PTO speed81.5 kWReference

Power at rated PTO speed88.9 kWReference

Dimensions

Wheelbase266 cmReference

Weight12148 to 13345 poundsReference

Front tire11L-15Reference

Rear tire18.4-38Reference

Ag front11L-15Reference

Ag rear18.4-38Reference

Length419 cmReference

Width248 cmReference

Height (exhaust)281 cmReference

Clearance (drawbar)40 cmReference

Bar rear axle82 mmReference

Operating5510 kgReference

Operating5588 kgReference

Operating6053 kgReference

Ballasted6921 kgReference

1066 Serial Number Location

Serial number plate on the left side of the tractor's clutch housing.Reference

1066 Serial Numbers

19717101Reference

197212677Reference

197324205Reference

197434949Reference

197546855Reference

197656672Reference

FAQ: How to read a serial number table.Reference

Test results

NTTL 1081: diesel Torque Amplifier 2WDReference

NTTL 1083: diesel hydrostatic 2WDReference

NTTL 1124: diesel gear 2WDReference

Diesel Torque Amplifier 2WDOctober 1 - 21, 1971Link: Nebraska Tractor Test 1081 fileReference

PTO performanceReference

Fuel use29.1 l/hourReference

Fuel use25.7 l/hourReference

Drawbar performanceReference

Fuel use28.8 l/hourReference

Gear 1-Hi-TA used for power test.Reference

Max pull5273 kgReference

Gear 3-Lo-TA used for pull test.Reference

Diesel hydrostatic 2WDOctober 7 - 25, 1971Link: Nebraska Tractor Test 1083 fileReference

Fuel use29.9 l/hourReference

Fuel use26.5 l/hourReference

Fuel use30.3 l/hourReference

Gear 5.4 MPH used for power test.Reference

Max pull4343 kgReference

Gear 3.1 MPH used for pull test.Reference

Diesel gear 2WDApril 17 - 27, 1973Link: Nebraska Tractor Test 1124 fileReference

Fuel use31.8 l/hourReference

Fuel use27.6 l/hourReference

Fuel use31.4 l/hourReference

Max pull5896 kgReference

Gear 2-Lo-Direct used for pull test.Reference

Speeds

With 18.4-38 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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