| Manufacturer | International Harvester |
| Price | 6,000(USD) |
| Model | 660 |
| Equipment Type | Standard-Tread Tractors |
| Factory |
NEBRASKA TRACTOR TEST 715 2
| Description | Diesel TA 2WD August 31 - September 5, 1959 Link: Nebraska Tractor Test 715 file PTO performance Drawbar performance Gear 2-TA used for pull test |
| Power at rated engine speed | 78.78hp / 58.7kW |
| Fuel use | 5.2gal/hour / 19.7l/hour |
| Max power | 64.43hp / 48.0kW |
| Max pull | 11,046lbs / 5010kg |
NEBRASKA TRACTOR TEST 721
| Description | Gasoline TA 2WD October 1 - 12, 1959 Link: Nebraska Tractor Test 721 file PTO performance Drawbar performance |
| Power at rated engine speed | 81.39hp / 60.7kW |
| Fuel use | 6.3gal/hour / 23.8l/hour |
| Max power | 70.21hp / 52.4kW |
NEBRASKA TRACTOR TEST 722
| Description | LP gas TA 2WD/October 3 - 12, 1959/Link: Nebraska Tractor Test 722 file/PTO performance/Drawbar performance |
| Power at rated engine speed | 80.63hp / 60.1kW |
| Fuel use | 8.8gal/hour / 33.3l/hour |
| Max power | 69.66hp / 51.9kW |
INTERNATIONAL HARVESTER 660 POWER
| Engine | 95hp / 70.8kW |
| Plows | 6 |
| Drawbar (tested) | 70.21hp / 52.4kW |
| PTO (tested) | 81.39hp / 60.7kW |
ENGINES OVERVIEW
The International Harvester 660 tractor is equipped with three engine options: a 4.3L gasoline, a 4.6L diesel, and a 4.3L LP gas variant, allowing flexibility in fuel choice depending on operational needs and availability. The diesel engine typically offers better fuel efficiency and torque for heavy-duty tasks, while the LP gas version provides cleaner emissions, making it suitable for applications in more controlled environments. Challenges may include fuel compatibility and operating costs, which can vary significantly across the engine options depending on the agricultural or industrial application.
| Description | International Harvester 4.3L 6-cyl gasoline International Harvester 4.6L 6-cyl diesel International Harvester 4.3L 6-cyl LP gas |
ENGINE DETAIL 1
The International Harvester 660, powered by a C-263 6-cylinder engine, delivers a respectable 95 hp at 2400 RPM and boasts a robust torque of 219 lb-ft at 1300 RPM, making it suitable for a variety of agricultural tasks requiring consistent power delivery at low RPMs. Its oil bath air cleaner enhances filtration efficiency, while the substantial oil and coolant capacities (9 quarts and 20 quarts, respectively) support extended operational periods, reducing maintenance frequency. However, the low compression ratio of 7.2:1 may limit power output, especially in high-altitude operations, and could lead to lower fuel efficiency compared to modern engines.
| Description | International Harvester C-263 gasoline 6-cylinder liquid-cooled vertical L-head |
| Displacement | 263ci / 4.3L |
| Bore/Stroke | 3.5625x4.3906inches / 90x 112 mm |
| Power | 95hp / 70.8kW |
| Air cleaner | oil bath |
| Compression | 7.2:1 |
| Rated RPM | 2400 |
| Torque | 219 lb-ft /297.0 Nm |
| Torque RPM | 1300 |
| Oil capacity | 9 qts /8.5 L |
| Coolant capacity | 20qts / 18.9L |
ENGINE DETAIL 2
The International Harvester 660 tractor features a robust D-282 diesel engine, offering a displacement of 4.6L with a high torque output of 219 lb-ft at 1800 RPM, making it suitable for heavy-duty applications. The oil bath air cleaner and high compression ratio of 18.2:1 enhance engine efficiency and durability, but may require careful maintenance to prevent performance issues. Overall, its power-to-weight ratio and torque characteristics provide excellent performance for farming tasks, though potential challenges include managing engine heat and ensuring adequate oil performance.
| Description | International Harvester D-282 diesel 6-cylinder liquid-cooled vertical L-head |
| Displacement | 282ci / 4.6L |
| Bore/Stroke | 3.6875x4.3906inches / 94x 112 mm |
| Power | 95hp / 70.8kW |
| Air cleaner | oil bath |
| Compression | 18.2:1 |
| Rated RPM | 2400 |
| Torque | 219 lb-ft /297.0 Nm |
| Torque RPM | 1800 |
| Firing order | 1-5-3-6-2-4 |
| Oil capacity | 9 qts /8.5 L |
| Coolant capacity | 23qts / 21.8L |
ENGINE DETAIL 3
The International Harvester 660 features a robust C-263 LP gas engine with a displacement of 263 ci (4.3L), generating 95 hp at 2400 RPM and delivering a peak torque of 212 lb-ft at 1200 RPM, thus providing efficient low-end power for agricultural tasks. Its oil bath air cleaner enhances dirt separation, which can prolong engine life in dusty conditions, while the 8.75:1 compression ratio indicates a balance between power and fuel efficiency. A notable consideration is the 9 qts oil capacity, which may require more frequent changes compared to modern tractors with larger sums; hence, operators should plan maintenance accordingly for optimal performance.
| Description | International Harvester C-263 LP gas 6-cylinder liquid-cooled vertical L-head |
| Displacement | 263ci / 4.3L |
| Bore/Stroke | 3.5625x4.3906inches / 90x 112 mm |
| Power | 95hp / 70.8kW |
| Air cleaner | oil bath |
| Compression | 8.75:1 |
| Rated RPM | 2400 |
| Torque | 212 lb-ft /287.5 Nm |
| Torque RPM | 1200 |
| Oil capacity | 9 qts /8.5 L |
| Coolant capacity | 21qts / 19.9L |
INTERNATIONAL HARVESTER 660 ENGINES
The International Harvester 660 tractor features three engine options: a 4.3L 6-cylinder gasoline engine, a 4.6L 6-cylinder diesel engine, and a 4.3L 6-cylinder LP gas engine, offering flexibility in fuel choice to optimize performance based on availability and cost. With a fuel tank capacity of 33 gallons (gas/diesel) and 37.5 gallons (LP gas), operators benefit from extended run times, reducing the frequency of refueling during heavy-duty tasks. Consider fuel efficiency, emissions regulations, and the specific application requirements when selecting the appropriate engine type for your agricultural needs.
| Description | International Harvester 4.3L 6-cyl gasoline International Harvester 4.6L 6-cyl diesel International Harvester 4.3L 6-cyl LP gas |
| Fuel tank | 33gal / 124.9L (gas/diesel)/37.5gal / 141.9L (LP gas) |
TRANSMISSIONS OVERVIEW
The International Harvester 660 tractor features a 5-speed or optional 10-speed transmission, allowing for versatile speed and torque adjustments suitable for various agricultural tasks. The 10-speed option provides enhanced control and efficiency during operations, especially in changing terrain or load conditions. However, the complexity of a multi-speed system may require more maintenance and operator training to fully utilize its benefits.
| Description | 5-speed/10-speed |
TRANSMISSION 1
The International Harvester 660 features a sliding gear transmission with 5 forward and 1 reverse gear, allowing for effective speed and torque management in various agricultural tasks. With an oil capacity of 64 quarts (60.6 liters), proper lubrication is critical for longevity and performance, although maintenance may require more frequent oil checks due to the fewer forward gears. Its straightforward transmission design can enhance user accessibility but may present challenges in precision gear selection under heavy load conditions.
| Transmission | sliding gear |
| Gears | 5 forward and 1 reverse |
| Oil capacity | 64qts / 60.6L |
SPEEDS 1
| Description | With 18.4/15-34 rear tires |
TRANSMISSION 2
The International Harvester 660's Torque Amplifier (TA) enables seamless transition between direct drive and lower speeds, enhancing operational efficiency, especially in variable field conditions. With a gear configuration of 10 forward and 2 reverse, it allows for versatile maneuverability, making it suitable for both heavy-duty fieldwork and transport tasks. However, the 64-quart oil capacity necessitates regular maintenance to ensure optimal performance and longevity of the transmission system.
| Transmission | Torque Amplifier |
| Gears | 10 forward and 2 reverse |
| Oil capacity | 64qts / 60.6L |
| Description | The Torque Amplifier (TA) provides a clutchless shift-on-the-move between direct drive (DD) and the lower TA speed. |
SPEEDS 2
| Description | With 18.4/15-34 rear tires |
MECHANICAL
The International Harvester 660 tractor features a 4x2 2WD configuration, making it suitable for flat terrain but limiting traction in muddy or hilly conditions. The optional hydrostatic power steering enhances maneuverability, especially during extended operations, while independent mechanical disc brakes provide reliable stopping power. Its 5-speed/10-speed transmission offers versatility for varying tasks, although the lack of a fully enclosed cab may expose operators to the elements, potentially impacting comfort during long hours of use.
| Chassis | 4x2 2WD |
| Steering | manual/hydrostatic power optional |
| Brakes | independent mechanical disc |
| Cab | Open operator station. |
| Transmissions | 5-speed/10-speed |
HYDRAULICS
| Valves | 1 |
| Total flow | 12gpm / 45.4lpm/17gpm / 64.3lpm (optional) |
| Steering flow | 2.5gpm / 9.5lpm |
POWER TAKE-OFF (PTO)
| Rear PTO | independent |
| Rear RPM | 540 |
INTERNATIONAL HARVESTER 660 TIRES
The International Harvester 660 tractor features adaptable tire configurations, with agricultural front tires (7.50-18) that provide excellent maneuverability in tight spaces. The rear agricultural tires (18.4/15-34) offer a broad footprint for improved traction and stability in field operations, while industrial rear options (23.1/18-26 or 16.9/14-34) enhance load-carrying capacity for construction or heavy-duty applications. A key consideration is selecting the appropriate tire type based on your operational needs, as the choice may impact soil compaction and operational efficiency.
| Ag front | 7.50-18 |
| Ag rear | 18.4/15-34 |
| Industrial rear | 23.1/18-26/16.9/14-34 |
DIMENSIONS
| Wheelbase | 85.5inches / 217cm |
| Length | 142.6inches / 362cm |
| Width | 78inches / 198cm (min) |
| Height (steering wheel) | 74inches / 187cm |
| Ground clearance | 19.7inches / 50cm (frame) |
| Clearance (front axle) | 17.4inches / 44cm |
INTERNATIONAL HARVESTER 660 WEIGHT
| Operating | 9,635lbs / 4370kg (gas)/9,875lbs / 4479kg (diesel) |
| Ballasted | 15,255lbs / 6919kg |
DIMENSIONS & TIRES
The International Harvester 660's wheelbase of 85.5 inches provides stability for field operations, but may limit maneuverability in tighter spaces. With a weight range of 9635 to 9875 pounds, it offers substantial traction for heavy-duty tasks, though it could result in soil compaction under prolonged use. The tire sizes (7.50-18 front and 18.4/15-34 rear) enhance flotation and grip, making it suitable for varied agricultural applications, particularly in softer soil conditions.
| Wheelbase | 85.5inches / 217cm |
| Weight | 9635 to 9875 pounds |
| Front tire | 7.50-18 |
| Rear tire | 18.4/15-34 |
IH-WAGNER 625 SELF-LEVELING LOADER
| Loader weight | 2,350lbs / 1065kg |
| Height (to pin) | 127.2inches / 323cm |
| Breakout force (lift) | 6,500lbs / 2948kg |
| Lift to full height (at pin) | 4,000lbs / 1814kg |
660 SERIAL NUMBERS
| Location | Right side of clutch housing |
| 1959 | 501 |
| 1960 | 3398 |
| 1961 | 4259 |
| 1962 | 5883 |
| 1963 | 6995 |