Tractor · Unverified
Farmall 766
Farmall 766 — 66 SeriesRow-Crop tractor · 80 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
80 hp
Max power
53.2 kW
Weight
4672 kg
Hover a source tag to verify
Overview
ManufacturerFarmall (a part of International Harvester)Reference
Row-Crop tractorReference
Built in Rock Island, Illinois, USAReference
Total built10,799Reference
Original price was $13,400 in 1976Reference
Two-wheel driveReference
Power steeringReference
Hydraulic dry disc brakesReference
Open operator station. Cab optional.Reference
Engine
International Harvester 4.8L 6-cyl gasolineReference
International Harvester 5.9L 6-cyl dieselReference
Fuel tank140.0 LReference
Drawbar (tested)54.7 kWReference
International Harvester C291Reference
gasolineReference
6-cylinderReference
liquid-cooledReference
Displacement4.8 LReference
Bore/Stroke95 x 112 mmReference
Air cleanerdual stage dryReference
Rated RPM2400Reference
Starter volts12Reference
International Harvester D360Reference
dieselReference
Displacement5.9 LReference
Bore/Stroke98 x 129 mmReference
Compression17:1Reference
Power at rated engine speed59.5 kWReference
Max power53.2 kWReference
Power at rated engine speed63.7 kWReference
Max power54.7 kWReference
Transmission
8-speed gearReference
16-speed two-speed power shiftReference
TypegearReference
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 Amplifer (TA) power shift. The TA allows a shift-on-the-move between direct drive and a lower speed.Reference
PTO & Hydraulics
PTO (tested)63.7 kWReference
Typeopen centerReference
Pump flow45.4 lpmReference
Rear Type2Reference
Rear PTOindependentReference
Rear PTO Type540/1000Reference
Power at rated PTO speed55.2 kWReference
Power at rated PTO speed63.9 kWReference
Dimensions
Wheelbase266 cmReference
Weight4672 kgReference
Front tire9.5L-15Reference
Rear tire18.4-34Reference
Ag front9.5L-15Reference
Ag rear18.4-34Reference
Length419 cmReference
Width248 cmReference
Height (exhaust)266 cmReference
Operating weight4672 kgReference
Ballasted weight5388 kgReference
Clearance (drawbar)35 cmReference
Front tread152 to 213 cmReference
Rear tread142 to 254 cmReference
766 Serial Number Location
Left side of clutch housingReference
766 Serial Numbers
19717101Reference
19727416Reference
19739611Reference
197412378Reference
197514630Reference
197616840Reference
FAQ: How to read a serial number table.Reference
Test results
NTTL 1094: gasoline Torque Amplifier 2WDReference
NTTL 1117: diesel Torque Amplifier 2WDReference
Gasoline Torque Amplifier 2WD4/20/1972Link: Nebraska Tractor Test 1094 fileReference
PTO performanceReference
Fuel use26.9 l/hourReference
Fuel use23.8 l/hourReference
Drawbar performanceReference
Fuel use27.6 l/hourReference
Gear 1-Hi-TA used for power test.Reference
Max pull4010 kgReference
Gear 2-Lo-Direct used for pull test.Reference
Diesel Torque Amplifier 2WDNovember 10 - December 5, 1972Link: Nebraska Tractor Test 1117 fileReference
Fuel use23.5 l/hourReference
Fuel use22.0 l/hourReference
Fuel use23.1 l/hourReference
Max pull4189 kgReference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.