Farmall 666
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Note: the Farmall model 666 is the same as the International Harvester 666. The following data is from the 666 listing. |
| Production | |
| Manufacturer | Farmall (a part of International Harvester) |
| Row-Crop tractor | |
| Built in Rock Island, Illinois, USA | |
| Total built | 9,367 |
| Original price | $11,875 |
| Farmall 666 Engines | |
| International Harvester 5.1L 6-cyl diesel | |
| International Harvester 4.8L 6-cyl gasoline | |
| Gas Fuel tank | 33 gal 124.9 L |
| Diesel Fuel tank | 31 gal 117.3 L |
 Engine details ... | |
| Farmall 666 Transmissions | |
| 5-speed | |
| hydrostatic | |
| 10-speed two-speed power shift | |
 Transmission details ... |
| Farmall 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 | |
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 Farmall 666 photos... | |
| 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) |
| Dimensions & Tires | |
| Wheelbase | 103 inches 261 cm |
| Weight | 6780 to 7420 pounds |
| Front tire | 7.50-16 |
| Rear tire | 15.5-38 |
 Full dimensions and tires ... | |
| 666 Serial Numbers | |
| Location: | Clutch housing, right side |
| 1972 | 7500 |
| 1973 | 8200 |
| 1974 | 11585 |
| 1975 | 13131 |
| 1976 | 15739 |
FAQ: How to read a serial number table. | |
| Electrical | |
| Charging system | alternator |
| Battery volts | 12 |
| References | |
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| Farm Equipment Reference Catalog published in 1972, by International Harvester |
| Page information | |
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| TractorData is a family-owned small business located in Minnesota that has been providing reference information on tractors since 1999. | |
| Peter Easterlund - owner/author | |
| Email: Peter@TractorData.com | |
| Updated on February 6, 2024 |