Introduction
International Harvester 660 Standard-Tread Tractor
The International Harvester 660 is a standard-tread agricultural tractor manufactured between 1959 and 1963. Part of the International Harvester series, this two-wheel-drive machine was designed for heavy-duty field operations and represents an era of robust mechanical engineering in American agricultural equipment.
Engine and Performance
The tractor is powered by an International Harvester C-263 liquid-cooled, six-cylinder L-head engine. With a displacement of 263 cubic inches (4.3 liters), it produces 95 hp. The engine is tuned for high-torque applications, delivering 212 lb-ft at a rated engine speed of 1200 RPM, which provides consistent pulling power for demanding agricultural implements.
Transmission and Drivetrain
The 660 offers two transmission configurations: a standard 5-speed sliding gear transmission or an optional 10-speed unit featuring the 'Torque Amplifier' (TA). The TA system allows the operator to shift between direct drive and a lower gear ratio on-the-go without using the main clutch, enhancing operational efficiency during varying load conditions.
Hydraulics and PTO
The hydraulic system provides a standard flow rate of 12 gpm, with an optional upgrade to 17 gpm for more demanding hydraulic requirements. The tractor is equipped with an independent rear power take-off (PTO) operating at 540 RPM, allowing for the operation of driven implements independent of the tractor's forward motion.
Dimensions and Handling
Built on an 85.5-inch wheelbase, the 660 features a stable footprint with a minimum width of 78 inches. It utilizes manual steering as standard, with hydrostatic power steering available as an option to reduce operator fatigue. Braking is handled by independent mechanical disc brakes, ensuring precise control in the field.
Conclusion
With 6,945 units produced, the International Harvester 660 remains a notable example of 1960s agricultural machinery. Its combination of a high-torque engine, flexible transmission options, and stable chassis makes it well-suited for general field work and heavy-duty traction tasks.
Production Information of International Harvester, 660
- Standard-tread tractor
| Manufacturer | International Harvester |
|---|---|
| Original price | $6,000 (1963) |
| Total built | 6,945 |
Dimension and Tires Information of International Harvester, 660
| Wheelbase | 85.5 inches [217 cm] |
|---|---|
| Ground clearance | 19.7 inches (frame) [50 cm] |
| Height (steering wheel) | 74 inches [187 cm] |
| Length | 142.6 inches [362 cm] |
| Clearance (front axle) | 17.4 inches [44 cm] |
| Width | 78 inches (min) [198 cm] |
| Ag front | 7.50-18 |
|---|---|
| Ag front(optional) | 16.9/14-34 |
| Ag rear | 18.4/15-34 |
| Industrial rear | 23.1/18-26 |
Engine Specifications of International Harvester, 660
- International Harvester C-263
- Liquid-cooled vertical L-head
- LP gas
- 6-cylinder
| Coolant capacity | 23 qts [21.8 L] |
|---|---|
| Air cleaner | Oil bath |
| Compression | 8.75:1 |
| Torque | 212 lb-ft [287.5 Nm] |
| Rated RPM | 2400 |
| Displacement | 263 ci [4.3 L] |
| Power | 95 hp [70.8 kW] |
| Bore/Stroke | 3.5625x4.3906 inches [90 x 112 mm] |
| Coolant capacity | 21 qts [19.9 L] |
| Oil capacity | 9 qts [8.5 L] |
| Torque RPM | 1200 |
Transmission Information of International Harvester, 660
Transmission variants 1
| Transmission | Sliding gear |
|---|---|
| Gears | 5 forward and 1 reverse |
| Oil capacity | 64 qts [60.6 L] |
Transmission variants 2
- The Torque Amplifier (TA) provides a clutchless shift-on-the-move between direct drive (DD) and the lower TA speed.
| Transmission | Torque Amplifier |
|---|---|
| Gears | 10 forward and 2 reverse |
| Oil capacity | 64 qts [60.6 L] |
- 5-speed
- 10-speed
Mechanical Specs of International Harvester, 660
- Two-wheel drive
- Open operator station.
- Independent mechanical disc brakes
| Steering | Manual |
|---|---|
| Steering(optional) | Hydrostatic power optional |
Power Information of International Harvester, 660
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540 |
Hydraulics Specifications of International Harvester, 660
| Valves | 1 |
|---|---|
| Steering flow | 2.5 gpm [9.5 lpm] |
| Total flow | 12 gpm [45.4 lpm] |
| Total flow(optional) | 17 gpm (optional) [64.3 lpm] |
Where it sits
With 95 HP, the International Harvester 660 sits just above 560 (72 HP) in International Harvester's range. Its power puts it in the 96th percentile of 1950s models in our database (592 machines).
Frequently asked questions
How much horsepower does the International Harvester 660 have?
The International Harvester 660 delivers 95 HP.
What years was the International Harvester 660 produced?
The International Harvester 660 was produced in 1959-1963.
What engine does the International Harvester 660 have?
The International Harvester 660 is powered by a LP gas, 6-cylinder engine.
What transmission does the International Harvester 660 use?
The International Harvester 660 uses a Sliding gear transmission.
Is the International Harvester 660 4WD?
The International Harvester 660 is available in 2WD.