Tractor · 1959Unverified
International Harvester 660
International Harvester 660 — Standard-tread tractor · 79 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
79 hp
Max power
48.0 kW
Weight
9635 to 9875 pounds
Hover a source tag to verify
Overview
ManufacturerInternational HarvesterReference
Standard-tread tractorReference
Total built6,945Reference
Original price$6,000 (1963)Reference
Two-wheel driveReference
SteeringmanualReference
Steeringhydrostatic power optionalReference
Independent mechanical disc brakesReference
Open operator station.Reference
Engine
International Harvester 4.3L 6-cyl gasolineReference
International Harvester 4.6L 6-cyl dieselReference
International Harvester 4.3L 6-cyl LP gasReference
Fuel tank124.9 LReference
Fuel tank141.9 LReference
Engine70.8 kWReference
Plows6Reference
Drawbar (tested)52.4 kWReference
International Harvester C-263Reference
gasolineReference
6-cylinderReference
liquid-cooled vertical L-headReference
Displacement4.3 LReference
Bore/Stroke90 x 112 mmReference
Power70.8 kWReference
Air cleaneroil bathReference
Compression7.2:1Reference
Rated RPM2400Reference
Torque297.0 NmReference
Torque RPM1300Reference
Oil capacity8.5 LReference
Coolant capacity18.9 LReference
International Harvester D-282Reference
dieselReference
Displacement4.6 LReference
Bore/Stroke94 x 112 mmReference
Compression18.2:1Reference
Torque RPM1800Reference
Firing order1-5-3-6-2-4Reference
Coolant capacity21.8 LReference
LP gasReference
Compression8.75:1Reference
Torque287.5 NmReference
Torque RPM1200Reference
Coolant capacity19.9 LReference
Power at rated engine speed58.7 kWReference
Max power48.0 kWReference
Power at rated engine speed60.7 kWReference
Max power52.4 kWReference
Power at rated engine speed60.1 kWReference
Max power51.9 kWReference
Transmission
5-speedReference
10-speedReference
Transmissionsliding gearReference
Gears5 forward and 1 reverseReference
Oil capacity60.6 LReference
TransmissionTorque AmplifierReference
Gears10 forward and 2 reverseReference
The Torque Amplifier (TA) provides a clutchless shift-on-the-move between direct drive (DD) and the lower TA speed.Reference
PTO & Hydraulics
PTO (tested)60.7 kWReference
Valves1Reference
Total flow45.4 lpmReference
Total flow64.3 lpmReference
Steering flow9.5 lpmReference
Rear PTOindependentReference
Rear PTO Type540Reference
Dimensions
Wheelbase217 cmReference
Weight9635 to 9875 poundsReference
Front tire7.50-18Reference
Rear tire18.4/15-34Reference
Ag front7.50-18Reference
Ag rear18.4/15-34Reference
Industrial rear23.1/18-26Reference
Industrial rear16.9/14-34Reference
Length362 cmReference
Width198 cmReference
Height (steering wheel)187 cmReference
Ground clearance50 cmReference
Clearance (front axle)44 cmReference
Operating4370 kgReference
Operating4479 kgReference
Ballasted6919 kgReference
International Harvester 660 attachments
front-end loaderReference
660 Serial Number Location
Right side of clutch housingReference
660 Serial Numbers
1959501Reference
19603398Reference
19614259Reference
19625883Reference
19636995Reference
Final?Reference
FAQ: How to read a serial number table.Reference
Test results
NTTL 715: diesel TA 2WDReference
NTTL 721: gasoline TA 2WDReference
NTTL 722: LP gas TA 2WDReference
Diesel TA 2WDAugust 31 - September 5, 1959Link: Nebraska Tractor Test 715 fileReference
PTO performanceReference
Fuel use20.8 l/hourReference
Drawbar performanceReference
Fuel use19.7 l/hourReference
Max pull5010 kgReference
Gear 2-TA used for pull test.Reference
Gasoline TA 2WDOctober 1 - 12, 1959Link: Nebraska Tractor Test 721 fileReference
Fuel use24.2 l/hourReference
Fuel use23.8 l/hourReference
LP gas TA 2WDOctober 3 - 12, 1959Link: Nebraska Tractor Test 722 fileReference
Fuel use33.7 l/hourReference
Fuel use33.3 l/hourReference
Speeds
With 18.4/15-34 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.