International Harvester 1566 Specs, Price and Review (2026)
Agricultural · 183 HP · Best for fuel efficiency and versatility
Power
183 HP (137 kW)
Fuel
Diesel
Transmission
Manual
PTO
156 HP @ 540 rpm
Weight
6,892 kg (7 t)
New price (est.)
$105,408 – $158,112
Est. used price
$36,893 – $110,678
Overview
The International Harvester 1566 sits in the 180+ HP large power class and is aimed at large-acreage farming, heavy tillage, and large-implement compatibility. International Harvester tractors are widely used across farm operations, and the 1566 represents a strong entry in the 180+ HP large segment. On this page you will find complete International Harvester 1566 specs including engine data, transmission type, hydraulic lift capacity, PTO output, dimensions, and operating weight. Use the International Harvester 1566 review sections on this page — TractorFit analysis, pros and cons, and use-case ratings — to judge suitability before purchasing. International Harvester 1566 price varies by year, hours, condition, and region — our used price estimate gives you a data-based range to start your search. Use this page to review all International Harvester 1566 data in one place — from specs and pricing to suitability ratings and direct comparisons with competing models.
TractorFitâ„¢ Analysis
Overall score
Based on specs and use-case fit for International Harvester 1566.
This model sits in the high-horsepower tier for heavy tillage, big balers, and large-acreage efficiency. A manual gearbox offers straightforward operation and lower complexity. Agricultural use cases include tillage, planting, hay, and material handling. PTO horsepower and speed options support mowers, hay tools, and other driven implements. Key specs include 183 HP, 156 HP PTO, 7 t operating weight, estimated used range $36,893–$110,678, and overall suitability 49/100.
Higher = simpler
Pros
- ✓Efficient consumption relative to power-to-weight and engine type.
- ✓Simple maintenance; mechanical transmission with lower repair costs.
- ✓High versatility: PTO and hydraulic options for multiple implements.
- ✓High power for heavy fieldwork and demanding equipment.
- ✓Reliable manual transmission with low maintenance cost.
Cons
- •May be excessive in size and fuel use for very small farms.
- •Limited capacity for intensive loader work.
- •Modest power-to-weight ratio; less agility in traction and on slopes.
- •Premium price segment relative to power and specification level.
International Harvester 1566 receives an overall suitability score of 49/100 from the TractorSuitabilityâ„¢ Engine. mixed use with multiple PTO and hydraulic implements, operations where fuel economy is a priority. The suitability sub-scores allow an objective comparison of performance across farm sizes and use types. Loader work rates 31/100; fuel efficiency index is 71/100. Maintenance is classified as Low: Mechanical transmission and straightforward engine design; lower repair costs and easier DIY or general dealer servicing. Operating cost tier is Moderate: Reasonable fuel efficiency and maintenance; operating costs are in line with the power class. Versatility (71/100) reflects PTO and hydraulic options; cost tier (39/100) reflects value for money. It has relative limitations in: small farm, large farm, loader. Overall, it offers a specialized profile for its class. The TractorSuitabilityâ„¢ Engine uses manufacturer technical data only to compute these indices in an objective, reproducible way. We recommend comparing these scores with your specific acreage, crop type, and implement needs before deciding.
Real-world performance & ownership
Highlights
- Top-tier power for maximum productivity and large implements.
- Manual transmission keeps design simple and ownership costs lower.
- Operating weight around 7 t supports traction and ballast for heavy implements.
- Rated PTO output of 156 HP supports mowers, hay tools, and other driven implements.
- Fuel efficiency scores well for its power class.
- Versatility index supports a wide range of tasks and attachments.
- Estimated used price range: $36,893–$110,678 USD.
- Farm orientation targets fieldwork, PTO work, and reliability.
Trade-offs
- Suitability scoring suggests above-average maintenance demands; consider repair history and local support.
- Loader suitability scores modestly; check front axle capacity and loader compatibility for heavy material work.
Best for
- Maximum productivity fieldwork
- Large balers and tillage
- Big-acreage and contractor use
- Fuel-conscious operation
- Mixed tasks and attachment use
Not ideal for
- Heavy, continuous loader work
- Low-maintenance-first buyers
- Light-duty or compact-property-only use
International Harvester 1566 — Pros and Cons
Pros
- Top-tier power for maximum productivity and large implements.
- Manual transmission keeps design simple and ownership costs lower.
- Operating weight around 7 t supports traction and ballast for heavy implements.
- Rated PTO output of 156 HP supports mowers, hay tools, and other driven implements.
- Fuel efficiency scores well for its power class.
- Versatility index supports a wide range of tasks and attachments.
- Estimated used price range: $36,893–$110,678 USD.
- Farm orientation targets fieldwork, PTO work, and reliability.
Cons
- Suitability scoring suggests above-average maintenance demands; consider repair history and local support.
- Loader suitability scores modestly; check front axle capacity and loader compatibility for heavy material work.
Used market insights
Estimated used price
$36,893 – $110,678 USD
High confidence
Estimate only. Actual prices vary by condition, hours, and region.
Buyer checklist
- Check engine and PTO hours; service history matters for long-term reliability.
- Confirm PTO speed (540/1000) and HP match your mowers, balers, or other implements.
- Inspect hydraulics and three-point hitch condition; repair costs can be high.
For used International Harvester 1566, hours and service history matter. Confirm PTO and hydraulic operation, tire condition, and that implements match your HP and category.
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Authorized dealerships selling and servicing International Harvester tractors.
Technical Specifications
What this means: Cylinder count and displacement affect smoothness and repair complexity; compare to similar models in the same HP band.
Engine
- Maximum Power (Gross)
- 183 HP (137 kW)
- Fuel Type
- Diesel
- Cooling
- Liquid
Compare with similar models
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Frequently asked questions
What fuel does the International Harvester 1566 use?
The International Harvester 1566 uses diesel fuel.
What is the weight of the International Harvester 1566?
Operating weight is approximately 6,892 kg (7 tons).
Where can I find used International Harvester 1566 listings?
This page links to international marketplaces where you can search for used International Harvester 1566 tractors; listings are provided by third parties.
How much does a used International Harvester 1566 cost?
Used International Harvester 1566 tractors are often listed in the range of $36,893–$110,678 USD (high confidence). Actual prices depend on hours, condition, and region.
Does the International Harvester 1566 have a PTO?
Yes. The International Harvester 1566 has a rear PTO rated at 156 HP at 540 rpm.
What is the horsepower of the International Harvester 1566?
The International Harvester 1566 is rated at 183 HP (gross) (137 kW).
International Harvester 1566: Complete Tractor Specifications and Technical Data
Overview
The International Harvester 1566 is a agricultural tractor from International Harvester designed for agricultural operations. This comprehensive tractor specifications guide provides complete technical data, engine specifications, transmission details, dimensions, and hydraulic system capabilities. This agricultural tractor features a 183 HP diesel engine with manual transmission, delivering reliable performance. Our tractor database provides detailed specifications and technical data for the International Harvester 1566, making it easy to compare with other models in the International Harvester lineup or across different brands.
Engine Specifications
The International Harvester 1566 is powered by a diesel engine that delivers 183 HP for agricultural tasks. Tractor horsepower is a critical specification that determines the machine's ability to handle various implements. The engine specifications demonstrate International Harvester's engineering expertise in creating efficient powerplants.
- Maximum Power: 183 HP (137 kW)
- Fuel Type: Diesel
- Cooling System: Liquid-cooled
Transmission Specifications
The International Harvester 1566 features a manual transmission system. Transmission type affects power delivery and operational efficiency. Different transmission types offer various advantages for different operating conditions and implement requirements.
Dimensions and Weight
Understanding tractor dimensions and weight is essential for storage, transport, and operational compatibility. The International Harvester 1566's specifications help determine if the tractor fits your operational requirements.
- Wheelbase: 2667 mm (105.0 in)
- Weight: 6892 kg (15.194 lbs)
Power Take-Off (PTO)
The PTO system allows the tractor to transfer engine power to driven implements. PTO specifications, including horsepower and speed ratings, are essential when selecting implements.
- PTO Speed: 540 rpm
- PTO Power: 156 HP (116 kW)
Performance and Applications
The International Harvester 1566 delivers 183 HP performance for agricultural applications including plowing, planting, and harvesting. Tractor performance metrics, including power output, hydraulic capabilities, and dimensions, determine the machine's suitability for various tasks. When evaluating tractor performance, consider your specific application requirements, operating conditions, and implement needs to ensure the International Harvester 1566 matches your operational demands.
Technical Data Summary
This guide provides complete technical data and detailed specifications for the International Harvester 1566. Key specifications include: 183 HP engine, manual transmission, 156 HP PTO, and 6892 kg weight. These tractor specifications enable accurate comparisons with other models. Our tractor database provides comprehensive data for thousands of models, making it easy to research specifications and compare tractors.
Conclusion
The International Harvester 1566 is a reliable agricultural tractor from International Harvester, designed for modern farming operations. With its 183 HP diesel engine and manual transmission, weighing 7 tons, it provides dependable performance for agricultural tasks. This comprehensive guide offers all essential International Harvester 1566 tractor data and specifications for informed decision-making.
Conclusion
With 183 HP, the International Harvester 1566 is a model worth considering carefully for operators who need Maximum productivity fieldwork, Large balers and tillage, Big-acreage and contractor use. Check the price range shown above and compare with similar models to ensure it fits your budget. Use our comparison tool to stack the 1566 against other tractors in the same HP range before making a final decision.