The International Harvester 666 is a 2WD utility tractor manufactured by International Harvester from 1972 to 1976. The
International Harvester 666 is equipped with one of two engines: a 5.1 L (312.0 cu·in) six-cylinder diesel engine or a 4.8 L (291.0 cu·in) six-cylinder gasoline engine and one of three transmissions: a sliding gear transmission with 5 forward and 1 reverse gear, hydrostatic transmission with infinite forward and reverse gears or a partial power shift transmission with 10 forward and 2 reverse gears and dry disc clutch.
The tractor could be equipped with the following engines:
- International Harvester D312. It is a 5.1 L, 5,113 cm2, (312.0 cu·in) six-cylinder natural aspirated diesel engine with 98.0 mm (3.86 in) of the cylinder bore and 112.0 mm (4.41 in) of the piston stroke. The compression ratio rating is 17.0:1.
- International Harvester C291. It is a 4.8 L, 4,767 cm2, (290.9 cu·in) six-cylinder natural aspirated gasoline engine. The cylinder bore is 95.0 mm (3.74 in) and the piston stroke is 112.0 mm (4.41 in). The compression ratio rating is 7.5:1.
The International Harvester 666 is equipped with hydrostatic power steering, dry disc brakes, open operator station, or two-post ROPS (optional).
International Harvester 666 Specifications
| General Specifications | |
| Model | International Harvester 666 |
| Length | – |
| Width | – |
| Height | – |
| Wheel base | 2,610 mm (102.8 in) |
| Ground clearance | – |
| Weight | 3,200 kg (7,055 lbs) |
| Fuel tank capacity | – |
| Battery | 12V |
| Cabin type | Open operator station or Two-post ROPS (optional) |
| Engine | |
| Engine model | International Harvester D312 |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 6 |
| Fuel type | Diesel |
| Displacement | 5.1 L, 5,113 cm2, (312.0 cu·in) |
| Bore and stroke | 98.0 mm X 112.0 mm (3.86 in X 4.41 in) |
| Compression ratio | 17.0:1 |
| Horsepower | – |
| Starter | Electric |
| Engine | |
| Engine model | International Harvester C291 |
| Engine type | Four-stroke, liquid-cooled, inline |
| Cylinders | 6 |
| Fuel type | Gasoline |
| Displacement | 4.8 L, 4,767 cm2, (291.0 cu·in) |
| Bore and stroke | 95.0 mm X 112.0 mm (3.74 in X 4.41 in) |
| Compression ratio | 7.5:1 |
| Horsepower | – |
| Starter | Electric |
| Transmission and chassis | |
| Chassis | 4×2 2WD |
| Steering type | Hydrostatic power |
| Brakes | Dry disc |
| Transmission model | – |
| Transmission type | Sliding gear |
| Gears | 5 forward and 1 reverse |
| Transmission model | – |
| Transmission type | Hydrostatic |
| Gears | Infinite forward and reverse |
| Transmission model | Torque-Amplifier |
| Transmission type | Partial power shift with dry disc clutch |
| Gears | 10 forward and 2 reverse |
| Speed | Forward: 26.5 kmh (16.5 mph) Reverse: 4.8 (3 mph) |
| Tires | |
| Front tires | Ag: 7.50-16 |
| Rear tires | Ag: 15.5-38 |
| Three-Point Hitch | |
| Category | II |
| Control type | – |
| Lift capacity (at ends) | – |
| PTO (Power take-off shaft) | |
| Rear PTO type | Independent |
| Rear PTO speed | 540 rpm |
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