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Tractor · 1972Unverified

International Harvester A-766

Name: International Harvester A-766
Brand: International Harvester

International Harvester A-766 — 66A Series · 80 hp. Reference specifications; pending source verification.

The International Harvester A-766 is a tractor model with an 80 hp rating, positioning it centrally within its class for power output. Manufactured from 1972 to 1978, this model features a 6-cylinder diesel liquid-cooled engine, paired with a powershift transmission for two-wheel drive operation. The listed weight of the A-766 is 4672 kg, making it suitable for tasks covering approximately 200 acres.

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

Rated power

80 hp

Weight

4672 kg

Catalogue coverage

Variants represented

Richest spec table

64 rows

Recorded power

80 hp

Recorded weight

4672 kg

Transmissions

8-speed sliding gear

Production years

1972-1978

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 Geelong, AustraliaReference

Two-wheel driveReference

Final drivesspur gearReference

Power steeringReference

Hydraulic dry disc brakesReference

Open operator station. Cab optional.Reference

Engine

International Harvester 5.1L 6-cyl dieselReference

Fuel tank140.0 LReference

Engine73.1 kWReference

International Harvester D-310Reference

dieselReference

6-cylinderReference

liquid-cooled inlineReference

Displacement5.1 LReference

Bore/Stroke98 x 111 mmReference

Power73.1 kWReference

Air cleanerdual stage dryReference

Compression16:1Reference

Rated RPM2300Reference

Torque336.3 NmReference

Torque RPM1600Reference

StarterelectricReference

Starter volts12Reference

Transmission

8-speed sliding gearReference

16-speed two-speed power shiftReference

Typesliding gearReference

Gears8 forward and 4 reverseReference

Clutchdry discReference

Four gears (1-4) in low and high ranges.Reference

TransmissionTorque AmplifierReference

Typetwo-speed power shiftReference

Gears16 forward and 8 reverseReference

Four gears (1-4) in two ranges (low/high) with the Torque Amplifier (TA) power shift. The TA allows a shift-on-the-move between direct drive and a lower speed.Reference

PTO & Hydraulics

PTO (claimed)59.7 kWReference

Typeopen centerReference

Pump flow45.4 lpmReference

Rear TypeIIReference

Rear PTOindependentReference

Rear PTO Type540/1000Reference

Dimensions

Wheelbase266 cmReference

Weight4672 kgReference

Front tire9.5L-15Reference

Rear tire18.4-34Reference

Ag front9.5L-15Reference

Ag rear18.4-34Reference

Length395 cmReference

Width231 cmReference

Height (steering wheel)215 cmReference

Operating weight4672 kgReference

Ballasted weight5388 kgReference

Front tread152 to 213 cmReference

Rear tread142 to 254 cmReference

A-766 Serial Numbers

Location:Left side of clutch housingReference

1972501Reference

19731140Reference

19741811Reference

19752553Reference

19763270Reference

19773999Reference

19784604Reference

Final4771Reference

FAQ: How to read a serial number table.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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