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Engine:
Farmall Standard
Power:
75 HP (Engine) / HP (PTO)
Fuel Type:
Diesel
Production:
1972 - 1976
| Overview | |
|---|---|
| Summary | x1972 - 1976 Row-Crop tractor |
| Production | |
|---|---|
| Manufacturer | Farmall (a part of International Harvester) |
| Summary | Row-Crop tractor / Built in Rock Island, Illinois, USA |
| Total built | 9,367 |
| Original price | $11,875 |
| Mechanical | |
|---|---|
| Summary | Two-wheel drive / Power steering / Dry disc brakes / Open operator station. Two-post ROPS or canopy optional. Cab available with air-conditioning. |
| Hydraulics | |
|---|---|
| Type | open center |
| Pump flow | 12 gpm 45.4 lpm |
| Tractor hitch | |
|---|---|
| Rear Type | II |
| Type | IH Fast Hitch |
| Electrical | |
|---|---|
| Charging system | alternator |
| Battery volts | 12 |
| References | |
|---|---|
| Summary | / Farm Equipment Reference Catalog published in 1972, by International Harvester |
| Note: the Farmall model 666 is the same as the International Harvester 666. The following data is from the 666 listing. | |
|---|---|
| Engine options | |
|---|---|
| Summary | International Harvester 5.1L 6-cyl diesel / International Harvester 4.8L 6-cyl gasoline |
| Engine Detail | |
|---|---|
| Summary | International Harvester D312 / diesel / 6-cylinder / liquid-cooled |
| Displacement | 312 ci 5.1 L |
| Bore/Stroke | 3.875x4.410 inches 98 x 112 mm |
| Power (gross) | 75 hp 55.9 kW |
| Fuel system | direct injection |
| Air cleaner | dual stage dry |
| Compression | 17:1 |
| Rated RPM | 2000 |
| Starter volts | 12 |
| Coolant capacity | 21 qts 19.9 L |
| Engine Detail | |
|---|---|
| Summary | International Harvester C291 / gasoline / 6-cylinder / liquid-cooled |
| Displacement | 291 ci 4.8 L |
| Bore/Stroke | 3.75x4.39 inches 95 x 112 mm |
| Power (gross) | 75 hp 55.9 kW |
| Air cleaner | dual stage dry |
| Compression | 7.5:1 |
| Rated RPM | 2000 |
| Starter volts | 12 |
| Coolant capacity | 21 qts 19.9 L |
| Note: the Farmall model 666 is the same as the International Harvester 666. The following data is from the 666 listing. | |
|---|---|
| Transmission options | |
|---|---|
| Summary | 5-speed / hydrostatic / 10-speed two-speed power shift |
| Transmission | |
|---|---|
| Transmission | sliding gear |
| Gears | 5 forward and 1 reverse |
| Transmission | |
|---|---|
| Type | hydrostatic |
| Gears | infinite forward and reverse |
| Transmission | |
|---|---|
| Transmission | Torque-Amplifier |
| Type | two-speed power shift |
| Gears | 10 forward and 2 reverse |
| Clutch | dry disc |
| Note: the Farmall model 666 is the same as the International Harvester 666. The following data is from the 666 listing. | |
|---|---|
| Farmall 666 Tires | |
|---|---|
| Ag front | 7.50-16 |
| Ag rear | 15.5-38 |
| Dimensions | |
|---|---|
| Wheelbase | 103 inches 261 cm |
| Length | 161 inches 408 cm |
| Width | 87 inches 220 cm |
| Height (steering wheel) | 77 inches 195 cm |
| Shipping weight | 6780 lbs (gas gear) 3075 kg |
| 7420 lbs (diesel hydro) 3365 kg | |
| Clearance (front axle) | 21 inches 53 cm |
| Clearance (drawbar) | 14 inches 35 cm |
| Front tread | 50 to 74 inches 127 to 187 cm |
| Front tread | 56 to 80 inches 142 to 203 cm |
| Rear tread | 50 to 96 inches 127 to 243 cm |
| Note: the Farmall model 666 is the same as the International Harvester 666. The following data is from the 666 listing. | |
|---|---|
| Tractor Tests | |
|---|---|
| Summary | NTTL 1151: 312 diesel Torque Amplifier 2WD / NTTL 1152: gasoline Torque Amplifier 2WD / NTTL 1154: gasoline hydrostatic 2WD / NTTL 1155: diesel hydrostatic 2WD |
| Nebraska Tractor Test 1151 | |
|---|---|
| Summary | 312 diesel Torque Amplifier 2WD November 3 - 14, 1973 Link: Nebraska Tractor Test 1151 file / PTO performance |
| Power at rated engine speed | 66.29 hp 49.4 kW |
| Fuel use | 4.7 gal/hour 17.8 l/hour |
| Summary | Drawbar performance |
| Max power | 58.01 hp 43.3 kW |
| Fuel use | 4.6 gal/hour 17.4 l/hour |
| Summary | Gear 3-Direct used for power test. |
| Max pull | 8,012 lbs 3634 kg |
| Summary | Gear 2-TA used for pull test. |
| Nebraska Tractor Test 1152 | |
|---|---|
| Summary | Gasoline Torque Amplifier 2WD November 5 - December 3, 1973 Link: Nebraska Tractor Test 1152 file / PTO performance |
| Power at rated engine speed | 66.30 hp 49.4 kW |
| Fuel use | 12.0 gal/hour 45.4 l/hour |
| Summary | Drawbar performance |
| Max power | 57.29 hp 42.7 kW |
| Fuel use | 5.7 gal/hour 21.6 l/hour |
| Summary | Gear 3-Direct used for power test. |
| Max pull | 7,981 lbs 3620 kg |
| Summary | Gear 2-TA used for pull test. |
| Nebraska Tractor Test 1154 | |
|---|---|
| Summary | Gasoline hydrostatic 2WD November 14 - December 3, 1973 Link: Nebraska Tractor Test 1154 file / PTO performance |
| Power at rated engine speed | 69.61 hp 51.9 kW |
| Fuel use | 6.9 gal/hour 26.1 l/hour |
| Power at rated PTO speed | 64.10 hp 47.8 kW |
| Fuel use | 5.8 gal/hour 22.0 l/hour |
| Summary | Drawbar performance |
| Max power | 53.86 hp 40.2 kW |
| Fuel use | 7.7 gal/hour 29.1 l/hour |
| Max pull | 8,427 lbs 3822 kg |
| Nebraska Tractor Test 1155 | |
|---|---|
| Summary | Diesel hydrostatic 2WD November 14 - December 3, 1973 Link: Nebraska Tractor Test 1155 file / PTO performance |
| Power at rated engine speed | 69.51 hp 51.8 kW |
| Fuel use | 5.6 gal/hour 21.2 l/hour |
| Power at rated PTO speed | 65.41 hp 48.8 kW |
| Fuel use | 5.3 gal/hour 20.1 l/hour |
| Summary | Drawbar performance |
| Max power | 53.10 hp 39.6 kW |
| Fuel use | 5.6 gal/hour 21.2 l/hour |
| Max pull | 8,310 lbs 3769 kg |
Last Database Update: 11/13/2025