AGCO ST25 Tractor 24 hp Key Features, Specs, and Performance Overview
AGCO ST25 Tractor 24 hp
The AGCO ST25 is a compact utility tractor known for its reliable performance and practical design. With a 24.3 hp diesel engine and strong build, it serves small farms, landscaping, and maintenance tasks.
Production & Identification
The AGCO ST25 was produced in the early 2000s as part of the ST series. It is distinguished by its compact size, three-cylinder Iseki diesel engine, and liquid cooling system.
AGCO designed the ST25 for light agricultural work, offering both 2WD and 4WD versions. The presence of a robust, dry air cleaner system helps keep the engine well protected during use.
On the exterior, you can identify the ST25 by AGCO’s familiar orange and gray color scheme and clear model decals on each side of the hood. The tractor features simple controls and a straightforward dashboard.
Its gear and hydrostatic PTO systems provide flexibility for different implements. This makes it suitable for a range of small-scale tasks.
Manufacturer / Brand
The AGCO ST25 comes from AGCO Corporation, a major player in global agricultural machinery. AGCO is known for owning brands such as Massey Ferguson, Challenger, and Fendt.
For the ST25, AGCO relied on Iseki, a Japanese manufacturer, to provide the engine and most design elements. This partnership blends AGCO’s broad agricultural expertise with Iseki’s experience in compact tractors.
AGCO marketed this tractor primarily to farmers and landowners who need reliable equipment for smaller properties. Iseki’s reputation for efficiency and longevity in diesel engines underpins the ST25’s strong performance in its class.
The tractor sold under the AGCO name in North America but shares many features with Iseki-branded models elsewhere.
Model Number / Series
You will find the ST25 in AGCO’s ST series. The model number, ST25, is part of a naming convention for the series, with “ST” standing for “Sub-compact Tractor.”
The number 25 reflects its approximate horsepower rating. The ST series includes other models with slightly higher or lower power ratings, but the ST25 sits close to the middle of the range.
This model was often chosen for its balance of manageable size and solid capability. The ST series is aimed at homeowners, estates, and small-scale operators.
It is designed to fill the gap between a garden tractor and larger utility models. This gives you versatility without added complexity.
Factory of Manufacture
The AGCO ST25 was manufactured by Iseki in Japan. Iseki’s factory is known for precise assembly and careful quality control.
AGCO sourced completed tractors or major components from this facility and then distributed them through its dealer network. Manufacture in Japan allows for consistent performance and durability, thanks to Iseki’s expertise in building compact tractors.
The Japanese origin of the ST25 is evident in its durable parts, careful engineering, and straightforward electronics. You’ll find the Iseki influence in the tractor’s layout, controls, and attention to maintenance details.
Years Produced
The AGCO ST25 was produced from 2001 to 2004. Production started in 2001 and ran for several years before the model was discontinued.
These years align with increased demand for compact and sub-compact tractors in North America. During that period, the ST25 was one of several options available from AGCO in the small tractor segment.
This limited production run means that while the ST25 is not rare, it is not as widely found as some larger tractors from AGCO and Iseki.
Original List Price (Launch Year)
When the AGCO ST25 launched, its original list price was in line with other compact utility tractors of its size. In the early 2000s, you could expect to pay between $10,000 and $13,000 for a new ST25, depending on features and dealer options.
This price included the base tractor, with extra cost for accessories such as a loader, mower deck, or cab. Pricing made the ST25 competitive for private owners and small operations.
The cost at launch reflected both AGCO’s brand value and Iseki’s engineering reputation.
Serial-Number Location
The serial number for the AGCO ST25 is important for parts lookup and registration. You can find the serial-number plate on the frame of the tractor, typically on the right side below the operator’s seat, or on the front axle housing.
Locate the stamped metal plate, which lists both the model and the unique serial number. This number is needed for warranty claims, identification, and when ordering replacement components.
Recording your serial number is essential, especially if you need to confirm the year of manufacture or match correct service parts. Make sure this area is clean and readable, as it can be covered by dirt and debris during regular use.
| Subtopic | Details |
|---|---|
| Production & Identification | Early 2000s; compact size; Iseki 3-cylinder diesel; AGCO orange/gray colors; simple controls |
| Manufacturer / Brand | AGCO Corporation (USA); partnership with Iseki (Japan) for design/engine |
| Model Number / Series | ST25 in ST series; “ST” for Sub-compact Tractor; 24.3 hp output |
| Factory of Manufacture | Manufactured by Iseki in Japan; known for precision assembly & quality |
| Years Produced | 2001–2004 |
| Original List Price | Approximately $10,000–$13,000 at launch (early 2000s, base model) |
| Serial-Number Location | Plate on right side of frame below seat or front axle housing; needed for ID and parts |
Engine Specifications
The AGCO ST25 uses a compact diesel engine with a modest power output and practical features for daily tasks. Its engine make, design, fuel system, and performance numbers provide dependable operation for small farm jobs.
| Specification | Value / Description |
|---|---|
| Engine Make & Model | Iseki 1.1L 3-cylinder diesel |
| Fuel Type & Emissions Tier | Diesel, Indirect Injection |
| Cylinders / Displacement | 3 Cylinders, 1.1 liters (68.5 cu in) |
| Rated Horsepower (Gross/Net) | 24.3 hp (Gross), 22.2 hp (Net) |
| Peak Torque (Nm @ rpm) | Not Specified, typical for 1.1L diesels |
| Compression Ratio | Approx. 22:1 |
| Cooling System & Capacity | Liquid-cooled, 6.1 gal (23.1 liters) tank |
Engine Make & Model
The AGCO ST25 tractor is equipped with an Iseki-manufactured engine. More specifically, it uses the Iseki 1.1L 3-cylinder diesel powerplant.
Iseki is known for making reliable diesel engines for use in compact tractors. The engine supports efficient operation, delivering a balance of performance and fuel economy.
You can expect this engine to provide steady service during routine agricultural or landscaping work.
Fuel Type & Emissions Tier
This tractor uses diesel fuel, delivered through an indirect injection system. Indirect injection is common in smaller diesel engines and can support smooth starting and operation.
The ST25’s diesel engine is built to meet basic emission requirements typical of its production era. It may not comply with the most recent Tier 4 emission standards since it lacks advanced after-treatment features.
The primary advantage is fuel efficiency compared to gasoline engines in similar tractors, especially at lower power levels.
Cylinders / Displacement
The engine in the ST25 features three cylinders arranged inline. This design keeps the engine compact while maintaining good performance.
It displaces 1.1 liters, or about 68.5 cubic inches. The small displacement is well-suited for the light- to medium-duty work that these tractors typically perform.
The three-cylinder configuration offers a good balance between smoothness, fuel efficiency, and serviceability. Lower vibration means more comfort during long hours of use.
Rated Horsepower (Gross & Net)
The Iseki 1.1L engine produces a gross horsepower of 24.3 hp. Gross horsepower is measured without load from accessories.
Net horsepower is a more realistic figure, measured with basic accessories attached. The AGCO ST25 provides a net rating of about 22.2 hp.
This makes the tractor suitable for mowing, tilling, loader work, and other routine jobs on small farms or properties. The available power is modest but efficient for the size and type of implements it can handle.
Peak Torque (Nm @ rpm)
Specific peak torque values in Newton meters for the AGCO ST25 are not listed in published sources. However, compact 1.1L diesel engines of this type generally provide peak torque at low to mid engine speeds.
While an exact number is unavailable, you can expect torque in the range of 60-75 Nm around 1600–1800 rpm for this class of engine. Peak torque at lower rpm helps maintain pulling power for steady work in the field or with implements.
Tractors like the ST25 use these torque characteristics for steady, controlled operation even during tough jobs.
Compression Ratio
The compression ratio for the Iseki 1.1L diesel engine is approximately 22:1. High compression is typical of diesel engines, which rely on compression ignition rather than spark ignition.
The high ratio improves fuel combustion efficiency and helps generate more torque at lower engine speeds. You may notice quicker starting and more consistent performance compared to lower-compression engines.
Cooling System & Capacity
This tractor’s diesel engine is liquid-cooled, using a radiator and coolant system to maintain safe operating temperatures. Liquid cooling is essential in compact tractors, as it allows for more consistent and reliable engine performance, especially during extended use.
The fuel tank holds about 6.1 gallons (23.1 liters), supporting long work sessions between refueling stops. Regular maintenance of the cooling system—such as checking coolant levels and radiator condition—is important to prevent overheating.
This allows you to keep the engine working efficiently and avoid unnecessary wear.
Power Take-Off (PTO)
The AGCO ST25 tractor is equipped with practical PTO features that help you connect and use a variety of implements. This includes options for both rear and mid PTO placements, multiple speed settings, and a sturdy horse-power rating.
| Feature | Details |
|---|---|
| PTO Horsepower | Approximately 19-20 hp (claimed) |
| PTO Type | Rear: Transmission (gear) or Independent (hydro) |
| PTO Activation | Electro-hydraulic wet disc (hydro models) |
| Rear PTO Speed | 540 rpm |
| Rear PTO Shaft Size | 1.375 inch (35 mm) |
| Mid PTO Option | Yes, independent |
Claimed PTO Horsepower
On the AGCO ST25, the engine produces around 24 horsepower. The claimed PTO horsepower is generally a bit lower, listed at about 19-20 hp at the rear PTO.
This difference is because the transmission system and PTO mechanism use some of the power before it reaches the implement. This level of PTO power is suitable for many mid-sized attachments, like rotary cutters, finishing mowers, tillers, and small balers.
It allows you to operate equipment that relies on consistent, steady output from the PTO without straining the tractor. If you plan to run heavier PTO-driven implements, knowing the PTO horsepower helps you match those tools with the tractor’s real capabilities.
PTO Type (Independent / Live / Economy)
The AGCO ST25 gives you both a rear PTO and an optional mid PTO. The rear PTO can be either transmission-driven (gear type) or independent (on hydrostatic transmission models).
If your tractor is the hydrostatic version, the independent PTO lets you operate the PTO regardless of tractor movement. This is useful when performing stationary work, such as running generators or post hole diggers.
Gear-type PTOs are engaged through the tractor’s main clutch and will stop spinning if you press the clutch. Independent PTOs are activated using a lever or switch and can keep running even if the tractor is stopped, making them more convenient for many jobs.
Some hydrostatic models use an electro-hydraulic wet disc clutch, which allows smoother engagement and reduces wear. The combination of PTO types gives you flexibility for both basic and advanced tasks.
PTO Speeds (540 / 1 000 rpm)
The rear PTO on the AGCO ST25 standardizes at 540 rpm, which fits most compact tractor implements in the United States and many other regions. The rear PTO shaft size is 1.375 inches (or 35 mm), matching common attachments.
The mid PTO is available on some models and can power mower decks or other special tools, but it is usually optional and may operate at a different speed. No 1,000 rpm PTO option is listed for the ST25.
Most compact and subcompact tractors like this one are built specifically for 540 rpm PTO implements. Make sure to use attachments rated for the correct speed to avoid equipment damage or unsafe conditions.
Always check your tractor’s model details for specifics, as PTO options might differ depending on the transmission type and the year of manufacture.
Transmission & Drivetrain
The AGCO ST25 tractor offers a versatile setup that gives you control over speed and traction. Its transmission and drivetrain features are designed for simple operation, durability, and adaptability on various terrains.
Transmission Type (Syncro, Powershift, CVT, HST)
You can choose between two main transmission types with the AGCO ST25. One option is a 6-speed manual gear transmission, also called a “gear drive” or “syncro” system, where you manually select each gear.
This setup is mechanical, using a clutch to change gears. The second option is a hydrostatic transmission (HST).
With the hydrostatic version, you control speed using a foot pedal and do not have to shift gears manually. This makes operation easier, especially for loader work or tasks that need frequent speed changes.
Both types use a dry mechanical clutch for the gear drive, and a hydraulic pump and motor system for the hydrostatic. The manual gear drive is reliable and simple to maintain, while the HST is favored for its ease of use and smooth operation.
Number of Gears / Ranges
The 6-speed gear transmission gives you six forward speeds and two reverse speeds. The gear layout provides flexibility for different field and yard tasks.
You can select slower gears for jobs that need more power or faster gears for transport. Hydrostatic transmission versions typically offer infinite speed variation within two or three selectable ranges – low and high.
This gives you precise control instead of set gear choices. The gear shift is easy to reach, and the pattern is simple, reducing confusion for the operator.
The reverse gears make maneuvers in tight spaces more efficient. The options allow you to match tractor speed closely to your task.
Top Transport Speed
With the standard gear transmission, the top forward speed is about 12 to 14 mph (19-22 km/h), depending on tire size and rear axle ratio. This makes it suitable for moving between jobs around your property or down short stretches of road.
The top transport speed will be similar for the hydrostatic transmission versions. Actual speed can vary based on load, terrain, and engine RPM.
For regular road travel, it is best to avoid heavy loads and use the right gear for safety. The brake system is effective for stopping from transport speeds.
Drive (2WD / 4WD / AWD)
The AGCO ST25 comes in two main drive setups: 2WD (two-wheel drive) and MFWD (Mechanical Front Wheel Drive), which is often called 4WD. Most ST25 models sold in North America are MFWD, providing power to all four wheels.
With 4WD engaged, you get better traction on hills, loose ground, or in wet conditions. You can switch between 2WD and 4WD, depending on your job.
The selector lever is easy to operate from the seat. MFWD or 4WD is recommended for loader work, mowing on slopes, and working in mud.
Two-wheel drive models are fine for flat, dry conditions but offer less traction in difficult terrain.
Differential-Lock & Final Drives
The differential lock is a standard feature on the AGCO ST25. By pressing a conveniently placed lever or pedal, you can lock the rear differential.
This forces both rear wheels to turn together, improving traction if one wheel slips in mud or on ice. The rear axle uses a simple, durable final drive setup.
This reduces maintenance and ensures reliable power delivery. The differential lock is especially useful in tight spots or when working on uneven ground.
Maintenance access is straightforward, and final drive components are designed for a long service life with regular care.
| Feature | Type/Details |
|---|---|
| Transmission Types | 6-speed manual (gear drive); Hydrostatic (HST) |
| Operation | Gear requires manual clutch and shift; HST uses pedal for variable speed |
| Number of Gears/Ranges | Manual: 6 forward, 2 reverse; HST: 2-3 ranges, infinite speeds within range |
| Top Transport Speed | 12-14 mph (19–22 km/h), may vary with tires and transmission type |
| Drive Options | 2WD and MFWD (4WD); selector lever in cab |
| Differential Lock | Standard on rear axle; lever or pedal operated |
| Final Drive System | Durable, simple reduction gear final drives |
Steering & Brakes
On the AGCO ST25 Tractor, steering and brakes are built for reliability and function. Both systems focus on precise control, safety, and ease of use while working in fields or tight spaces.
Steering System (Hydrostatic / Power-Assisted / Mechanical)
The AGCO ST25 is equipped with power steering. This feature uses hydraulic power to assist you, making it easier to turn the steering wheel with minimal effort.
When working with heavy loads or operating in rough terrain, the power steering system provides smooth and steady handling. The steering uses a hydraulic system rather than a strictly mechanical linkage.
This reduces the amount of manual force you need, especially at lower speeds or while stationary. For operators working long hours, this system reduces fatigue and improves precision.
With power steering, you can make fast adjustments without worrying about resistance from the front axle. The system is sealed for durability, and its maintenance is straightforward, focusing mainly on fluid level checks.
Turning Radius (With Brakes)
The turning radius of the AGCO ST25 is tight, allowing efficient movement even in small fields or near obstacles. The addition of brake-assisted turning helps achieve an even shorter radius for sharper maneuvers.
When you apply the brakes on one side, the tractor pivots more sharply around the inside wheel. This feature is useful for making headland turns or when navigating narrow rows.
The combination of power steering and brake-assisted turning means the ST25 handles well in confined spaces. Turning with brakes is especially helpful when paired with implements that require precision.
Service Brakes (Wet Disc, Dry Drum, etc.)
The service brakes on the AGCO ST25 use a dry shoe system. This type of brake uses friction from dry brake shoes pressing against a drum to slow down or stop the tractor.
Dry shoe brakes are common in compact tractors due to their straightforward operation and ease of maintenance. You can expect reliable stopping power with these brakes, although they may require regular inspection to prevent dust and debris buildup.
The dry design means there are no fluids involved, making them less prone to leaks but more subject to wear. In normal use, the dry shoe brakes provide consistent braking force.
Parking Brake Type
The AGCO ST25 is equipped with a mechanical parking brake. Once engaged, this brake holds the tractor securely in place, even on slopes or uneven ground.
The mechanism is reliable and does not rely on hydraulic or electronic components. Engaging the parking brake is a quick process using a simple lever.
Once set, it prevents unintentional rolling or movement when the tractor is parked or not in use. Mechanical systems like this are both user-friendly and easy to maintain.
Regular checks should ensure the parking brake linkage stays properly adjusted. A tight and correctly working parking brake is important for safety, especially when working on hilly terrain.
AGCO ST25 Tractor: Steering & Brakes Overview
| Feature | Type/Specification | Benefits | Maintenance Tips |
|---|---|---|---|
| Steering System | Hydraulic Power Steering | Easy and low-effort maneuvering | Check fluid levels regularly |
| Turning Radius (With Brakes) | Tight radius, brake assist | Sharp turns in small areas | Inspect brakes for wear |
| Service Brakes | Dry Shoe | Simple, consistent braking | Replace shoes as needed |
| Parking Brake | Mechanical lever | Secure hold when parked | Adjust linkage as required |
Cab & Operator Station
Operator comfort, safety, and convenience are important when choosing a compact tractor like the AGCO ST25. Key features to examine include rollover protection structures, climate control, the quality of the seat, and noise levels.
ROPS / Cab Option
The AGCO ST25 comes standard with a Rollover Protective Structure (ROPS), not a fully enclosed cab. ROPS is designed to keep you safe in case of a rollover.
There is no factory cab included, but some aftermarket soft cabs or canopies are available. These can protect you from rain, sun, and wind, but they do not provide full enclosure or true weather proofing.
A ROPS bar allows for easy entry and exit. The design leaves the operator fully exposed to outside conditions.
If you are working in open fields or mild weather, this setup is practical and easy to maintain, while still prioritizing your safety with sturdy construction. For cold or wet climates, you may want to consider adding an optional weather shield.
Climate Control (A/C, Heater, Filter)
Since the AGCO ST25 does not have a factory cab, it does not offer integrated air conditioning, heater, or air filtration system. In standard configuration, you rely on natural airflow and dressing accordingly for the weather.
Some aftermarket cabs offer limited heating or ventilation options using small electric or 12-volt fans and portable heaters. These are useful for occasional use but do not replace true climate control.
There are no dust filters or advanced comfort features provided by the manufacturer. If you plan to operate in dusty or extreme climates, pay attention to your own protective gear.
Wearing a hat, proper clothing, and sunglasses can help improve comfort during long hours on the tractor.
Seat & Suspension
The operator seat on the AGCO ST25 is a basic, adjustable agricultural seat. It includes a vinyl covering that is resistant to most weather conditions and is easy to wipe clean after use.
Seat adjustments allow you to set the position for both reach and comfort. There is no advanced seat suspension.
Instead, you get a standard seat spring that absorbs some vibration. For most light tasks and short operations, this is sufficient.
For bumpy terrain or extended operation, you may notice more vibration and jostling compared to larger tractors with deluxe suspension seats. Seat armrests are typically not included.
Some users install seat covers or aftermarket cushions for extra comfort, especially during long sessions.
Noise Level (dB A @ Operator Ear)
The open operator station design means you are exposed to normal diesel engine noise. There is no insulation or muffled cab enclosure.
At the operator position, noise levels depend on engine speed and load. You can expect typical sound levels for a compact tractor of this size, often ranging from 80 to 85 dB(A) at the operator’s ear.
This is similar to loud traffic or a power lawn mower. Prolonged exposure to these levels can cause hearing fatigue, so using ear protection is recommended during long periods of work.
If you are sensitive to noise, bring ear plugs or earmuff-style protectors when operating the AGCO ST25. The engine’s sound is steady but can become tiring over several hours.
| Feature | Standard/Available | Key Details | Operator Experience |
|---|---|---|---|
| ROPS / Cab Option | ROPS standard, Cab optional | Factory ROPS, no factory cab, aftermarket soft cabs available | Open air, protected in rollovers |
| Climate Control | Not Available | No A/C, no heater, no air filter; aftermarket fans/heaters possible | Exposed to ambient temperature/weather |
| Seat & Suspension | Basic adjustable seat | Vinyl, basic spring suspension, no armrests, can add cushions | Simple comfort, little vibration damping |
| Noise Level (dB A) | 80–85 dB(A) at operator ear | No insulation or soundproofing; ear protection recommended for extended use | Similar to loud traffic/lawn mower |
Hydraulics
The AGCO ST25 tractor uses an open-center hydraulic system. Important details include pump type, flow rates, pressure ratings, and remote valve specifics.
System Type (Open-Center / Closed-Center / PFC)
The AGCO ST25 uses an open-center hydraulic system. In open-center systems, hydraulic oil circulates continuously through the pump when the controls are not in use.
This setup is common in compact utility tractors like the ST25. You will notice simpler controls and lower cost compared to closed-center hydraulic setups.
Maintenance is straightforward since the system is less complex. Pressure does not build until you move a control lever.
While not as efficient as pressure and flow compensated (PFC) systems, open-center is reliable for light to moderate hydraulic work. This approach works well for implements that do not require simultaneous, high-flow operations.
It is a practical choice for loaders, small implements, and basic hydraulic tools.
Implement Pump Flow (L min⁻¹)
The implement pump on the ST25 delivers oil for attachments and implements. Pump flow capacity is important because it determines how fast your hydraulic tools and loader move.
For the AGCO ST25, the hydraulic pump has a total capacity of 14.0 liters (3.7 gallons) per minute. This flow rate is enough for most light to moderate tasks such as raising the loader, adjusting a mower deck, or operating other implements.
It might not be enough for demanding hydraulic tools that need a constant high flow. Hydraulic speed may slow if you use more than one function at a time, due to system size and flow limits.
Steering Pump Flow (If Separate)
Not all compact tractors use a separate pump for steering.
On the AGCO ST25, the main hydraulic pump handles both implement and steering functions together.
This combined approach means the available flow is shared between steering and implements.
When you steer while using a loader or other hydraulic tool, you may notice slightly slower implement response.
No separate pump means less complexity and easier maintenance.
You need to be aware of total flow limits if performing maneuvers with an active implement.
Total Combined Flow
Combined flow capacity is key, as it sets the maximum oil supply for all functions at once.
The AGCO ST25 offers a total hydraulic flow of 14.0 liters (3.7 gallons) per minute.
This figure includes both implements and steering, since they operate from the same pump.
Realistically, using both at the same time divides that flow.
For most routine loader work or small hydraulic tasks, this combined flow is sufficient.
If your tasks require high, dedicated flow rates, consider a machine with a dual-pump or higher capacity system.
System Pressure (bar / psi)
Hydraulic system pressure determines the force available to your implements and loader.
On the AGCO ST25, the system operates at a maximum pressure of around 140 bar (2,030 psi).
This pressure is suitable for most jobs handled by compact tractors, like lifting moderate loads, angling a blade, or running small attachments.
You should always check hoses, fittings, and seals for leaks or wear, as all hydraulic systems operate under high pressure.
Use safety practices whenever working with pressurized hydraulic components.
Pressure affects lift capacity and response speed.
In this range, the ST25 handles a variety of common implements safely and efficiently.
Remote Valves (Number & Type)
Remote hydraulic valves let you use attachments with their own cylinders, like a loader or rear implement.
The AGCO ST25 is available with at least one rear remote valve.
This is typically a single-acting or double-acting spool valve.
You can use this for hydraulically powered implements, such as a dump trailer or a small backhoe.
Options may include both fixed and float positions.
You may have the ability to add more valves via aftermarket kits, depending on your needs.
Check your specific model for the number and type installed, especially if you plan to run several hydraulic tools.
| Hydraulic Topic | Specification / Details |
|---|---|
| System Type | Open-center |
| Implement Pump Flow | 14.0 L/min (3.7 gal/min) |
| Steering Pump Flow | Not separate; combined with implement pump |
| Total Combined Flow | 14.0 L/min (3.7 gal/min) |
| System Pressure | 140 bar (2,030 psi) |
| Remote Valves | 1 rear valve (single-acting or double-acting); expandable options |
Three-Point Hitch (3PH)
The AGCO ST25 tractor is equipped with a three-point hitch designed for light to medium-duty tasks.
Understanding its hitch category, lift capacity, control features, and sensing options will help you make the best use of its capabilities.
| Subtopic | Detail |
|---|---|
| Hitch Category | Category 1 |
| Lift Capacity | 694 pounds (at the ball ends) |
| Draft/Position Control | Position control (no draft control) |
| Top-Link Sensing | Not available |
Hitch Category (1 / 1N / 2 / 3)
The AGCO ST25 uses a Category 1 three-point hitch.
Category 1 is common for compact tractors and is suitable for many light and some medium-duty implements.
The lower hitch pins are 7/8 inch in diameter, and the width between the arms is about 26 inches.
You can attach a variety of compatible tools, such as box blades, rotary cutters, and tillers.
Most implements designed for subcompact and small utility tractors will fit, but larger Category 2 equipment will not connect directly.
This setup is straightforward to use and easy to adjust.
You will need to make sure any implement you buy is rated for Category 1.
Lift Capacity @ Ball Ends
The three-point hitch on the ST25 can lift up to 694 pounds at the ball ends.
This figure is typical for this size of tractor and covers most small farm, landscaping, and garden tools.
Always check the actual weight of your intended implement.
Attachments heavier than the lift capacity could overload the system or reduce stability.
The rating at the ball ends reflects the maximum you can raise, not what you should constantly carry.
If you add front weights or ballast to the rear wheels, you can improve safety when lifting close to the maximum limit.
It’s best to stay below the maximum lift for routine work.
Draft / Position Control
The ST25 comes standard with position control for its three-point hitch.
With position control, you can raise or lower the implements to any precise height and keep it there.
This helps achieve a consistent working depth, especially with blades or mowers.
Draft control is not included.
Draft control automatically adjusts the hitch height based on soil resistance, but it is usually found on larger or more advanced tractors.
Without draft control, you will need to make adjustments manually if soil conditions change.
Position control is simple to use and preferred for most hobby and light commercial users.
Top-Link Sensing (Yes/No)
The AGCO ST25 does not feature top-link sensing on its three-point hitch.
Top-link sensing is typically found on higher-end or larger utility tractors.
It allows for more advanced draft control by measuring the forces on the upper hitch point for automatic adjustments.
Since there is no top-link sensing, you have direct and manual control over your implements’ depth and angle.
For most users, especially in landscaping or light-duty tasks, this is rarely a limitation.
Focus on proper setup, regular checks, and weight distribution.
This will allow the three-point hitch to perform accurately and safely for your needs.
Axles & Load Limits
The AGCO ST25 tractor has a sturdy axle system designed for stability and strength.
Understanding the axle capabilities and load limits helps you work safely and get the most from your tractor.
| Feature | Front Axle | Rear Axle | Final Drive Type |
|---|---|---|---|
| Maximum Load (kg) | Not specified (see info below) | 1099 kg (max tractor weight) | Mechanical, 4WD |
| Ground Clearance | 27 cm (11 in) | 27 cm (11 in) | Fixed axle, all-wheel drive |
| Rear Lift at Ends | — | 548 kg | — |
| Rear Lift at 24 in (610 mm) | — | 314 kg | — |
Maximum Front-Axle Load (kg)
The exact front axle load rating for the AGCO ST25 is not specified in public data.
You can use the overall maximum tractor weight as a guide—this tractor has an operating weight of about 720 kg, with a maximum weight limit nearing 1099 kg (2424 lbs).
Front axle strength is important for handling loader attachments, front weights, or when the tractor is operated on uneven ground.
Adding excessive front weight can strain axle components or cause increased tire wear.
You should check the manufacturer’s recommendations before installing front implements or carrying heavy tools.
Keeping within suggested limits will protect the integrity of the axle and ensure you maintain safe steering and handling while working.
Maximum Rear-Axle Load (kg)
The rear axle is designed to handle heavier loads than the front.
The maximum weight limit for the AGCO ST25 is 1099 kg (2424 lbs), including the weight of the tractor, operators, mounted tools, and carried materials.
The three-point rear hitch system is rated for a lift of 548 kg (at lift ends) and 314 kg (at 24 inches behind the lift point).
These numbers show the point where axle strain and tractor stability become concerns.
When using rear implements like blades, tillers, or ballast, monitor total weight and distribution.
Proper load management extends the life of the axle and keeps the tractor safe and functional for daily use.
Final-Drive Type
The AGCO ST25 comes with a mechanical, all-wheel drive system.
This 4WD setup uses fixed axle designs with a mechanical front-drive axle that engages all four wheels full time.
This final-drive type offers superior traction, especially on soft, uneven, or sloped terrain.
It distributes power evenly to all wheels, reducing slip during heavy pulling or loading tasks.
You do not need to manually engage or disengage 4WD—it is always active.
This increases reliability and makes the tractor easier to use for tasks that involve frequent changes in direction or load.
The system is simple but robust, with limited required maintenance if kept within load guidelines.
Tires & Track Options
Tire and track options on the AGCO ST25 affect its traction, ground pressure, and versatility.
Your choice will influence performance on turf, in the field, or when working with more demanding implements.
Standard Front Tire Size (Ag / Turf / Industrial)
The AGCO ST25 is designed for flexibility with different front tire types.
Agricultural (Ag) tires are standard and are optimized for fieldwork.
Typical front Ag tire size: 7-12.
Ag tires provide superior grip in soft soil and help reduce slippage during farming operations.
If you work mainly on grass or sports fields, Turf tires are a common alternative.
Turf tire size is usually 20×8.00-10.
These tires are wider with shallower tread, reducing damage to delicate surfaces and providing a smoother ride.
Industrial tires are an option if your work involves mixed surfaces or tougher terrain.
They are more robust, with a size such as 20×8.00-10, and have a harder, more wear-resistant tread for improved durability on gravel or pavement.
Comparison Table: Front Tire Types and Sizes
| Tire Type | Size | Best For | Tread Design |
|---|---|---|---|
| Agricultural | 7-12 | Field / soil work | Deep lugs |
| Turf | 20×8.00-10 | Grass / sports fields | Wide, shallow |
| Industrial | 20×8.00-10 | Mixed / hard surfaces | Robust, blocky |
Standard Rear Tire Size
Rear tires do most of the pulling work and affect stability.
The standard rear Ag tire size for the ST25 is typically 11.2-16.
These are larger and have deep tread for good traction when using implements or working in muddy areas.
Turf rear tires are commonly 33×12.50-16.5.
They offer less aggressive tread and a wider contact patch.
This reduces soil disturbance and protects grass surfaces.
Industrial rear tires may be sized 33×12.50-16.5 as well and use a heavier, blockier tread.
They are built for durability and resist wear on hard or abrasive surfaces.
Rear Tire Size and Usage Table
| Tire Type | Size | Advantages |
|---|---|---|
| Agricultural | 11.2-16 | Superior field traction |
| Turf | 33×12.50-16.5 | Reduced turf damage, gentle ride |
| Industrial | 33×12.50-16.5 | High durability, mixed terrain |
Optional Duals / Tracks / Flotation Kits
For specific needs, you can equip the AGCO ST25 with extra tire or track options.
Duals on the rear axle are available for enhanced traction and stability, especially useful on slopes or pulling heavy implements.
Duals are best suited for operations where maximum pulling force and balance are required.
Tracks or rubber track conversion kits are not factory-standard, but aftermarket solutions are available.
Tracks spread the tractor’s weight over a larger area.
This reduces ground pressure and is useful for soft, wet, or muddy fields where regular tires might sink.
Flotation kits use extra-wide tires front and rear.
They help distribute weight, protect soil, and lessen crop disturbance.
Flotation tires are valuable if your main tasks include working on wet soils or minimizing compaction in sensitive areas.
Options Table: Duals, Tracks, Flotation
| Option | Where Used | Main Benefit | Limitations |
|---|---|---|---|
| Rear Duals | Field/slopes | Extra traction, stability | Adds width, cost |
| Rubber Track Kits | Mud/wet fields | Lower ground pressure | Reduced road speed, more expense |
| Flotation Tires | Wet/soft soils | Soil protection, floatation | Reduced precision, tire cost |
Dimensions & Weight
The AGCO ST25 tractor has defined measurements and weight specifications that affect how you use, transport, and maintain the machine.
Familiarizing yourself with these specifics helps you understand equipment limits and adapt to a variety of tasks and terrains.
| Feature | Value | Notes |
|---|---|---|
| Wheelbase | 59.9 inches (152 cm) | Stability and turning |
| Overall Length | 105.5 inches (267 cm) | Storage and transport |
| Overall Width (Minimum Tread) | 41 inches (104 cm) | Field and transport width |
| Height To ROPS / Cab | 75.2 inches (191 cm) | Overhead clearance |
| Ground Clearance | 11 inches (27 cm) | Obstacle negotiation |
| Shipping Weight | 1,588 lbs (720 kg) | Standard unit weight |
| Operating Weight (With Fluids) | ~1,700-1,800 lbs (est.) | Includes common fluids |
Wheelbase
The AGCO ST25 has a wheelbase of 59.9 inches (152 cm). Wheelbase is the measurement from the front axle center to the rear axle center.
A longer wheelbase helps improve stability on rough ground and gives a smoother ride. With this measurement, the ST25 offers a balance between maneuverability in tight spots and steady handling on uneven surfaces.
For parking, storage, or trailer loading, understanding the wheelbase can help you plan for turning or fitting the machine into a specific area.
This length allows for a decent balance of weight distribution, which helps minimize soil compaction and improves traction when you’re handling heavier loads.
Overall Length
The tractor’s overall length is 105.5 inches (267 cm). This is the full span from the front tip, often the front weights or tires, to the very rear.
This length is significant when you are moving the tractor through narrow gates or storing it indoors. Since space in sheds or trailers can be tight, knowing your tractor’s true length lets you plan ahead.
You should also consider this length when attaching implements; extra attachments will extend the total space required. For tasks such as turning in confined plots or storage with other equipment, overall length is a critical factor.
Overall Width (Minimum Tread)
The overall width (minimum tread) of the AGCO ST25 is about 41 inches (104 cm). Minimum tread refers to the narrowest set position of the wheels.
A width of 41 inches means this tractor can fit through relatively narrow spaces, such as gates or between crop rows. It’s suitable for smaller plots and passes through most standard barn doors and sheds.
If you adjust the tread wider, the tractor becomes more stable, but also takes up more room. Knowing the minimum width helps you gauge whether the tractor fits your specific needs for row crops, vineyard operation, or general property use.
Height To ROPS / Cab
The height to the ROPS (Roll-Over Protective Structure) is 75.2 inches (191 cm). This is the height from the ground to the highest fixed point when ROPS is in place.
This measurement guides you on the tractor’s ability to clear door headers, barn openings, or low-hanging branches. If your access points or garage have low ceilings, measuring ahead of time prevents damage and frustration.
A height of just over 75 inches allows this tractor to fit beneath many medium-height structures. It can also make it easier to transport on a trailer if there are vertical clearance limits, such as under bridges or in storage buildings.
Ground Clearance
The ground clearance for the AGCO ST25 is 11 inches (27 cm). Ground clearance is the space between the ground and the lowest point of the tractor frame or undercarriage.
This measurement helps you know what kind of obstacles the tractor can clear without the risk of getting stuck or dragging. Eleven inches is enough for most small farm or landscape tasks, handling rough or bumpy ground.
With enough clearance, you can travel over field debris, uneven land, or minor ruts with less risk of damaging parts underneath the tractor, such as transmission oil pans or other mechanical elements.
Shipping Weight
The shipping weight is 1,588 pounds (720 kg). Shipping weight is the weight of the tractor without fluids, attachments, or optional equipment.
Knowing the shipping weight helps you plan for trailer load limits if you need to transport the tractor. It also indicates how much you might expect to lift or tow if you are moving the tractor in or out of a shipping crate or onto a flatbed.
This offers a baseline for comparing to similar tractors or for compliance with transportation regulations, such as highway weight limits or farm policy requirements.
Operating Weight (With Fluids)
Operating weight includes all standard fluids like fuel, oil, coolant, and sometimes additional options like tires filled with ballast fluid. For the AGCO ST25, the operating weight is typically estimated to be about 1,700 to 1,800 pounds (depending on tires and fuel level).
This extra weight improves traction and stability when the tractor is working, especially with heavier implements. When estimating load for towing or floor strength in a storage building, it’s important to use the operating weight.
Be aware that adding attachments, loaders, or heavy tools increases the final working weight. Always consider the equipment setup when calculating transport or working loads.
Fuel & Fluids
Understanding your AGCO ST25 tractor’s fuel and fluid requirements is important for getting reliable performance and preventing unnecessary wear. Using the correct types and amounts of each fluid will help your engine and hydraulic systems run smoothly.
| Fluid Type | Capacity | System/Location | Notes |
|---|---|---|---|
| Diesel Fuel | ~5.8 gallons | Main Fuel Tank | Use clean diesel; indirect injection system |
| Diesel Exhaust Fluid | N/A | DEF Tank (none) | This tractor does not require DEF |
| Engine Oil | ~3.2 quarts | Engine Crankcase | Check dipstick for exact level |
| Hydraulic/Transmission Oil | ~4.5 gallons | Hydraulic/Transmission | Use specified type, check sight glass/level plug |
Fuel-Tank Capacity
The AGCO ST25 uses a 5.8 gallon (approximately 22-liter) diesel fuel tank. This size supports the 24.3 hp, 3-cylinder Iseki diesel engine, which has an indirect injection fuel system.
The fuel system uses a dry air cleaner and glow plugs for starting. Filling the fuel tank with clean diesel is important, as contaminated fuel can harm the engine or fuel filters.
Always use diesel that meets local standards for tractors or off-road equipment. The fuel cap is accessible near the operator’s station for easy refueling.
It is a good idea to check for leaks or cracks around the tank and cap before and after filling. Fuel consumption will vary depending on how hard the tractor is working, but with normal use, a full tank can provide several hours of operation.
DEF-Tank Capacity (If Applicable)
The AGCO ST25 tractor does not require a Diesel Exhaust Fluid (DEF) tank. This model uses a smaller, indirect injection diesel engine, which does not need DEF for emissions control.
The emissions system does not include Selective Catalytic Reduction (SCR) technology. Since there is no DEF tank, you do not need to worry about filling or maintaining DEF.
That means you only need to focus on keeping clean diesel in the main fuel tank. This reduces costs and lowers the number of fluids you need to monitor during regular maintenance.
Engine Oil Capacity
The engine oil capacity for the AGCO ST25 is approximately 3.2 quarts (about 3.0 liters). Engine oil lubricates internal parts, reduces wear, and helps manage engine temperature.
Always use the oil type and viscosity specified in your owner’s manual. For this tractor, typical choices include high-quality diesel engine oils with ratings such as 15W-40.
You should check the engine oil using the dipstick before each use and add oil if the level is near or below the minimum mark. Change the engine oil and filter regularly – usually every 100 hours of operation or yearly, whichever comes first.
Failure to change the oil may result in engine damage or reduced performance.
Hydraulic/Transmission Oil Capacity
The hydraulic and transmission system shares a reservoir on the AGCO ST25. This combined system uses about 4.5 gallons (roughly 17 liters) of fluid.
Use a multi-purpose tractor hydraulic/transmission oil that matches the specification found in your manual. Proper fluid levels are essential for smooth hydraulics and reliable transmission shifting.
Check the fluid level with the sight glass or level plug as directed. Low or dirty fluid can cause erratic movement, noisy operation, or damage to hydraulic components.
Change this oil according to the service schedule, typically every 400-500 hours of use. Always inspect for leaks in hoses and connections.
Electrical System
The AGCO ST25 tractor relies on a standard 12-volt electrical system designed to support engine starting, charging, and operation of lights or basic accessories. This system includes a negative ground, a reliable alternator setup, and a specific battery sized for the tractor’s demands.
| Subtopic | Specification / Details |
|---|---|
| Ground Type | Negative |
| Alternator / Charging System | Alternator, standard for compact tractors |
| Charging Output (Amps) | Usually 35-40 amps for this class |
| Battery Voltage | 12 volts |
| Battery CCA Rating | 450 CCA (Cold Cranking Amps) |
Ground Type (Negative / Positive)
The AGCO ST25 tractor uses a negative ground electrical system. This is the most common setup in modern tractors and vehicles.
In a negative ground system, the negative battery terminal is connected to the chassis or frame. This helps improve electrical safety for you and makes the tractor compatible with most replacement parts or accessories.
It also reduces the risk of electrical shorts and helps simplify troubleshooting when you have an electrical issue. Negative ground makes it easier to add lights, flashers, and other electrical tools, since most of the equipment you may need to install will be designed for the same system.
You do not need any special adapters or modifications to work with the majority of 12-volt accessories.
Alternator / Charging System
The charging system of the AGCO ST25 includes a dependable alternator. This alternator is belt-driven by the engine and is designed to keep the battery full while also supplying power to the tractor’s electrical accessories.
Alternators on this class of compact tractors use an internal voltage regulator. This helps ensure a steady charging current and protects sensitive electronics from voltage spikes.
If your tractor has extra work lights or you use a sprayer pump, the alternator provides enough power to keep everything working at once. It is important to sometimes check the alternator belt for tension and condition.
A worn belt or loose connection can cause slow charging and lead to electrical problems. If the alternator fails, you will quickly notice dim lights or slow starting.
Charging Output (Amps)
The standard alternator on the AGCO ST25 usually provides 35 to 40 amps of charging output. This is a typical range for compact utility tractors of this size and horsepower.
With this charging output, the battery recovers quickly after engine starts or after running electrical equipment. It also supports the factory lighting and allows for moderate use of extra lights or tools.
If you add more electrical accessories than usual, make sure the total draw does not exceed the alternator’s output. If you find your battery drains faster than it charges, consider checking for excessive draw or alternator problems.
Battery Voltage
Your AGCO ST25 tractor uses a 12-volt battery system. This is the standard battery voltage for almost all compact and utility tractors.
It offers reliable cranking power for the diesel engine and supports all the tractor’s electronic needs. A 12-volt system also makes it simple to find replacement batteries or accessories, such as chargers and inverters.
Most tractor maintenance and repair tools, as well as jump starters, are made for this specification. Make sure the battery terminals are clean and secure.
Corrosion or loose connections can cause slow cranking or electrical faults. When replacing the battery, always match it with a 12-volt type for safety and performance.
Battery CCA Rating
The specific Cold Cranking Amps (CCA) rating for the AGCO ST25 battery is 450 CCA. CCA is a measure of how well the battery can deliver power at low temperatures.
The higher the CCA, the easier it is to start the tractor in cold weather. A 450 CCA battery provides enough power to turn over the 3-cylinder diesel engine reliably, even in winter.
If you operate in very cold areas or if your battery is over three years old, test the CCA to make sure you still have enough starting ability. When replacing, always choose a battery with at least 450 CCA.
Using a lower-rated battery might cause hard starts during the winter months or when the engine oil is thick. Keep battery terminals tight and check the charge regularly.
Table: Electrical System Overview
| Feature | Specification |
|---|---|
| Ground Type | Negative |
| Alternator Output | 35-40 amps |
| Battery Voltage | 12 volts |
| Battery CCA | 450 CCA |
Total Cost Of Ownership Metrics
Understanding the AGCO ST25’s ownership costs helps you plan for annual expenses. Key factors include maintenance, repairs, depreciation rate, and actual fuel use.
Recommended Service Intervals
You should follow the AGCO recommended service intervals for the ST25 to maintain performance and reliability. Oil and filter changes are typically needed every 100 hours of use.
Hydraulic fluid and filter replacements should be done every 300 hours. Inspect and clean the air filter every 50 hours, replacing it if needed.
Grease all fittings at least every 50 hours. Check the cooling system fluid and clean the radiator screen often, especially in dusty conditions.
Belts, hoses, and battery should be inspected monthly. Completing these tasks on time reduces breakdowns and saves on repair costs.
Estimated Annual Maintenance Cost
Annual maintenance cost depends on usage hours, local labor rates, and parts prices. For most users running the ST25 around 250 hours per year, you can expect to spend $350 to $600 annually on oil, filters, lubricants, and minor parts.
Factoring in typical shop labor for minor repairs and periodic adjustments, this cost can rise to $750 per year. Non-routine fixes, like hydraulics or drivetrain, may raise this number. Preventive maintenance helps keep your yearly costs consistent and avoids sudden, expensive repairs.
Depreciation Curve (% Per Year)
Tractors like the AGCO ST25 usually experience the greatest value drop in the first three years. Expect the ST25 to depreciate around 15% in the first year.
Depreciation typically continues at 8-10% each year for the next four years. After five years, depreciation slows, often staying below 5% annually.
Actual rates depend on maintenance, hours used, and local demand. Keeping service records and regular care helps retain your tractor’s value.
| Year | Depreciation Rate (%) | Value Remaining (%) |
|---|---|---|
| 1 | 15 | 85 |
| 2 | 10 | 75 |
| 3 | 8 | 67 |
| 4 | 8 | 59 |
| 5 | 5 | 54 |
| 6+ | 3 | varies |
Fuel Consumption @ Rated Load (L hr⁻¹)
At rated load, the AGCO ST25’s 24 hp diesel engine uses about 3.0 to 3.5 liters of fuel per hour. Usage can be lower during lighter work and higher if you run heavy attachments or use PTO often.
Clean air filters and proper tire inflation can help keep fuel consumption close to factory levels.
| Metric | Typical Value |
|---|---|
| Rated Load Consumption | 3.0 – 3.5 L/hr |
| Light Work | 2.2 – 2.8 L/hr |
| Heavy PTO Use | Up to 4.0 L/hr |