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McCormick-Deering O-4 Specs, Price and Review (2026)
Agricultural · 24 HP · Best for small farms and versatility
Power
24 HP (18 kW)
Fuel
Diesel
Transmission
Manual
PTO
20 HP @ 540 rpm
Weight
1,960 kg (2 t)
New price (est.)
$13,824 – $20,736
Est. used price
$4,838 – $14,515
Overview
The McCormick-Deering O-4 is a 24 HP agricultural tractor built for small farms, landscaping, and light loader duties. The McCormick-Deering tractor lineup is known for durability, and the O-4 is no exception. This page provides detailed McCormick-Deering O-4 specifications — engine, transmission, PTO, hydraulics, weight, and dimensions — sourced from manufacturer technical data. Whether you need a O-4 review for a purchase decision or a trade-in comparison, this page covers performance analysis and suitability scoring. For McCormick-Deering O-4 price guidance, we provide new price estimates and used market ranges so you can budget accurately before contacting a dealer. Compare the McCormick-Deering O-4 with similar tractors using the links below, or use our TractorFit™ analysis to see how it scores for your specific operation.
TractorFitâ„¢ Analysis
Overall score
Based on specs and use-case fit for McCormick-Deering O-4.
This model sits in the low-horsepower segment ideal for mowing, landscaping, and small-acreage tasks. Manual transmission is a proven choice for operators who prefer direct gear selection. As a farm tractor, it is built for fieldwork, PTO-driven implements, and all-day reliability. Rear PTO capability allows use of mowers, tillers, and other PTO-driven equipment. Key specs include 24 HP, 20 HP PTO, 2 t operating weight, estimated used range $4,838–$14,515, and overall suitability 53/100.
Higher = simpler
Pros
- ✓Well suited to small and mid-size farms for power and maneuverability.
- ✓Simple maintenance; mechanical transmission with lower repair costs.
- ✓High versatility: PTO and hydraulic options for multiple implements.
- ✓Strong value for money relative to power and features.
- ✓Reliable manual transmission with low maintenance cost.
Cons
- •Limited power for large-scale work or heavy equipment.
- •Limited capacity for intensive loader work.
- •Modest power-to-weight ratio; less agility in traction and on slopes.
- •Basic hydraulic system; limited for demanding implements.
McCormick-Deering O-4 receives an overall suitability score of 53/100 from the TractorSuitability™ Engine. Ideal for small to mid-size farms (roughly 5–40 ha), light fieldwork, mowing, and properties where maneuverability matters, mixed use with multiple PTO and hydraulic implements, tight spaces and transport on smaller trailers. The suitability sub-scores allow an objective comparison of performance across farm sizes and use types. With 24 HP and around 2 tons weight, it fits small and mid-size farms where maneuverability and running costs matter. Loader work rates 18/100; fuel efficiency index is 62/100. 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 Low: Good fuel efficiency, strong value tier, and low maintenance complexity keep operating costs down. Versatility (71/100) reflects PTO and hydraulic options; cost tier (89/100) reflects value for money. It stands out in: small farm, value. It has relative limitations in: large farm, loader. Overall, it offers a specialized profile for its class. The TractorSuitability™ 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
- Compact engine output suits mowing and light loader use.
- Manual transmission keeps design simple and ownership costs lower.
- Operating weight around 2 t aids maneuverability and transport.
- Rated PTO output of 20 HP supports mowers, hay tools, and other driven implements.
- Versatility index supports a wide range of tasks and attachments.
- Estimated used price range: $4,838–$14,515 USD.
- Farm orientation targets fieldwork, PTO work, and reliability.
Trade-offs
- Maintenance complexity is rated on the higher side; factor in service access and parts availability.
- Loader and front attachment suitability is limited by design; best for lighter loader duties.
Best for
- Small property maintenance
- Landscaping and mowing
- Light material handling
- Mixed tasks and attachment use
Not ideal for
- Heavy, continuous loader work
- Low-maintenance-first buyers
- Large-acreage row-crop or heavy tillage
McCormick-Deering O-4 — Pros and Cons
Pros
- Compact engine output suits mowing and light loader use.
- Manual transmission keeps design simple and ownership costs lower.
- Operating weight around 2 t aids maneuverability and transport.
- Rated PTO output of 20 HP supports mowers, hay tools, and other driven implements.
- Versatility index supports a wide range of tasks and attachments.
- Estimated used price range: $4,838–$14,515 USD.
- Farm orientation targets fieldwork, PTO work, and reliability.
Cons
- Maintenance complexity is rated on the higher side; factor in service access and parts availability.
- Loader and front attachment suitability is limited by design; best for lighter loader duties.
Used market insights
Estimated used price
$4,838 – $14,515 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 McCormick-Deering O-4, hours and service history matter. Confirm PTO and hydraulic operation, tire condition, and that implements match your HP and category.
Find Used Listings (International)
Find McCormick-Deering Dealers Near You
Authorized dealerships selling and servicing McCormick-Deering tractors.
Technical Specifications
What this means: Gross HP and torque influence implement sizing; diesel is standard for farm use and longevity.
Engine
- Maximum Power (Gross)
- 24 HP (18 kW)
- Fuel Type
- Diesel
- Cooling
- Liquid
Compare with similar models
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Frequently asked questions
Is the McCormick-Deering O-4 good for loader work?
TractorFit scores rate this model as less suited for loader work (18/100). Check front axle capacity and loader compatibility for your intended use.
What is the McCormick-Deering O-4 best used for?
As a farm tractor, the McCormick-Deering O-4 is suited to fieldwork, PTO-driven implements, hay work, and general estate or small-farm tasks.
What type of transmission does the McCormick-Deering O-4 have?
The McCormick-Deering O-4 uses a manual transmission.
What should I check when buying a used McCormick-Deering O-4?
Verify hours, condition, service history, PTO operation, hydraulics, and tire wear. Confirm weight and dimensions if you need to transport or match implements.
What fuel does the McCormick-Deering O-4 use?
The McCormick-Deering O-4 uses diesel fuel.
What is the weight of the McCormick-Deering O-4?
Operating weight is approximately 1,960 kg (2 tons).
Where can I find used McCormick-Deering O-4 listings?
This page links to international marketplaces where you can search for used McCormick-Deering O-4 tractors; listings are provided by third parties.
How much does a used McCormick-Deering O-4 cost?
Used McCormick-Deering O-4 tractors are often listed in the range of $4,838–$14,515 USD (high confidence). Actual prices depend on hours, condition, and region.
McCormick-Deering O-4: Complete Tractor Specifications and Technical Data
Overview
The McCormick-Deering O-4 is a agricultural tractor from McCormick-Deering 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 24 HP diesel engine with manual transmission, delivering reliable performance. Our tractor database provides detailed specifications and technical data for the McCormick-Deering O-4, making it easy to compare with other models in the McCormick-Deering lineup or across different brands.
Engine Specifications
The McCormick-Deering O-4 is powered by a diesel engine that delivers 24 HP for agricultural tasks. Tractor horsepower is a critical specification that determines the machine's ability to handle various implements. The engine specifications demonstrate McCormick-Deering's engineering expertise in creating efficient powerplants.
- Maximum Power: 24 HP (18 kW)
- Fuel Type: Diesel
- Cooling System: Liquid-cooled
Transmission Specifications
The McCormick-Deering O-4 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 McCormick-Deering O-4's specifications help determine if the tractor fits your operational requirements.
- Width: 191 mm (7.5 in)
- Wheelbase: 1695 mm (66.7 in)
- Weight: 1960 kg (4321 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: 20 HP (15 kW)
Performance and Applications
The McCormick-Deering O-4 delivers 24 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 McCormick-Deering O-4 matches your operational demands.
Technical Data Summary
This guide provides complete technical data and detailed specifications for the McCormick-Deering O-4. Key specifications include: 24 HP engine, manual transmission, 20 HP PTO, and 1960 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 McCormick-Deering O-4 is a reliable agricultural tractor from McCormick-Deering, designed for modern farming operations. With its 24 HP diesel engine and manual transmission, weighing 2 tons, it provides dependable performance for agricultural tasks. This comprehensive guide offers all essential McCormick-Deering O-4 tractor data and specifications for informed decision-making.
Conclusion
With 24 HP, the McCormick-Deering O-4 is a model worth considering carefully for operators who need Small property maintenance, Landscaping and mowing, Light material handling. Check the price range shown above and compare with similar models to ensure it fits your budget. Use our comparison tool to stack the O-4 against other tractors in the same HP range before making a final decision.