International Harvester 666
| | 1972 - 1976 |
| Row-Crop tractor |
|
| Production |
| Manufacturer | International Harvester
|
| Row-Crop tractor |
| Built in Rock Island, Illinois, USA |
| Total built | 9,367
|
| Original price | $11,875
|
| Torque amplifier was an option. In 1973, the hydrostatic version of the 666 was renamed the 70 Hydro. |
| International Harvester 666 Power |
| Engine (gross) | 75 hp
55.9 kW
|
| Drawbar (claimed) | 57 hp (gear)
42.5 kW
|
| | 54 hp (hydro)
40.3 kW
|
| PTO (claimed) | 65 hp (gear)
48.5 kW
|
| | 69 hp (hydro)
51.5 kW
|
| Drawbar (tested) | 58.01 hp
43.3 kW
|
| PTO (tested) | 69.61 hp
51.9 kW
|
 Performance test details ... |
| Mechanical |
| Two-wheel drive |
| Power steering |
| Dry disc brakes |
| Open operator station. Two-post ROPS or canopy optional. Cab available with air-conditioning. |
| Photos |
| No photos of the International Harvester 666 are currently available. To submit yours, email it to Peter@TractorData.com. Photos may only be used with the permission of the original photographer. |
| Hydraulics |
| Type | open center
|
| Pump flow | 12 gpm
45.4 lpm
|
| Tractor hitch |
| Rear Type | II
|
| Type | IH Fast Hitch
|
| Power Take-off (PTO) |
| Rear PTO | independent
|
| Rear PTO Type | 540 (1.375)
|
| Electrical |
| Charging system | alternator
|
| Battery volts | 12
|
| References |
 |
| Farm Equipment Reference Catalog published in 1972, by International Harvester |
| Page information |
 |
| Copyright 2026 TractorData.com® |
| Email me: Peter@TractorData.com |
| TractorData is a family-owned small business located in Minnesota. I have been researching tractor history and providing specifications for free since 1999. |
| Peter Easterlund - owner/author |
| This machine's data modified on May 20, 2026 |
©2000-2026 - TractorData.com®. Notice: Every attempt is made to ensure the data listed
is accurate. However, differences between sources, incomplete listings,
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Consult official
literature from the manufacturer before attempting any service or repair.
Engine details ...
Transmission details ...
Full dimensions and tires ...