AGCO ST30 Tractor 30 hp Specifications, Features, and Performance Overview
Production & Identification
The AGCO ST30 is recognized for its reliable construction, strong performance, and compact utility design. You can learn more about where it was made, the company behind it, its identification details, and other key production facts below.
Manufacturer / Brand
The AGCO ST30 was produced by AGCO Corporation, but the tractor itself was manufactured in Japan by Iseki, a well-known name in the creation of compact utility tractors. AGCO is a global company based in the United States, but it often collaborates with other leading brands for specific models.
Iseki’s heritage of making efficient and durable compact tractors made it a strong choice as a manufacturer for the ST30. You may also find versions badged under other brands, like Massey Ferguson, due to AGCO’s ownership of multiple farm equipment lines.
The branding on your unit should say AGCO, but sometimes, similar models are seen under the Massey Ferguson label, especially in certain markets. You will usually find clear AGCO markings and model designations on the hood and sides of the tractor.
Model Number / Series
The AGCO ST30 is part of the AGCO ST Series, which includes other models such as the ST25 and ST30x. The “ST” in the name stands for “Subcompact Tractor,” and the “30” indicates its 30-horsepower class.
The official model designation is “ST30.” Some production years offered slight updates, sometimes marketed as the ST30x.
These differences are minor and mostly involve feature upgrades or regional changes. When ordering parts or identifying specifications, use the full “ST30” or “ST30x” designation, as features like transmission or PTO ratings may be different across the series.
The ST Series itself is recognized for its versatility in small-scale farming and landscaping operations, covering a wide range of compact tractors under the AGCO and related brands.
Factory of Manufacture
Iseki, located in Japan, manufactured the AGCO ST30. Their factory specializes in compact tractors, and the ST30 shares many design features with Iseki’s own tractors.
All units exported to the United States and other countries were assembled in Japan before being branded and distributed by AGCO. The collaboration meant high Japanese manufacturing standards, which contributed to the tractor’s reputation for reliability.
Japan’s Iseki plant has produced compact tractor models for several brands, not just AGCO and Massey Ferguson. This heritage is reflected in the construction quality and compatibility with some Iseki-branded components.
Years Produced
The AGCO ST30 was first introduced to the market in the early 2000s, with the main production years spanning roughly from 2002 to 2008. The exact years of availability may vary depending on your region due to distribution timelines and local demand.
During this production window, the design remained mostly consistent, with only small modifications or equipment upgrades in later years. The ST30x, for instance, was introduced as a revised version with several improvements over the original ST30 in the mid-2000s.
You can check your tractor’s production year by referencing its serial number or consulting the AGCO or Iseki dealer documentation.
Original List Price (Launch Year)
When launched, the AGCO ST30 was priced as a mid-range compact utility tractor. The original list price in the early 2000s was approximately $13,000 to $16,000 USD, depending on the chosen configuration, transmission, and optional equipment.
The price could increase if you selected options such as four-wheel drive (MFWD), a hydrostatic transmission, or factory-installed loaders. The ST30 was positioned competitively against similar compact tractors from Kubota, John Deere, and New Holland at the time.
Serial-Number Location
The serial number is a vital part of your tractor’s identification. On the AGCO ST30, you will typically find the serial number on a metal plate located on the side of the tractor frame, just below the operator’s seat or near the left side of the transmission housing.
This number helps you confirm the tractor’s build year, identify specific variants (like ST30x or ST25), and order the correct replacement parts. It’s important to keep a record of this serial number for registration, insurance, and service history.
Some ST30 units also include a secondary serial or chassis stamp near the front axle or under the hood, but always refer to the main plate for official records.
AGCO ST30 Production & Identification Quick Reference Table
| Topic | Details |
|---|---|
| Manufacturer / Brand | AGCO Corporation (Brand); Iseki, Japan (Manufacturer). Also seen under Massey Ferguson. |
| Model Number / Series | ST Series; Main model: ST30; Related: ST25, ST30x |
| Factory of Manufacture | Iseki manufacturing plant, Japan |
| Years Produced | 2002 – 2008 (approximate, varies by region) |
| Original List Price | $13,000 – $16,000 USD (2002 launch pricing) |
| Serial-Number Location | Metal plate on frame below seat or left side of transmission housing |
Engine Specifications
The AGCO ST30 tractor uses a compact but strong diesel engine designed for dependable agricultural work. Its specifications cover horsepower, torque, cooling methods, and more, giving you key technical details for use and maintenance.
Engine Make & Model
The AGCO ST30 is powered by an Iseki 1.5L 3-cylinder diesel engine.
Iseki is a respected Japanese manufacturer known for reliable and long-lasting engines, often used in small tractors and utility vehicles.
This specific 1.5-liter engine is naturally aspirated rather than turbocharged. It is configured for efficient fuel burn and steady power delivery.
You get a solid balance between size, weight, and output. For many users, this means manageable maintenance and parts availability.
When you look at the engine, you will find a straightforward and practical design. The air filter is easy to access and replace, making routine care simple.
Iseki engines are built to handle long periods of use with minimal fuss.
Fuel Type & Emissions Tier
The tractor runs on diesel fuel. Diesel provides better fuel efficiency and more torque at low speeds compared to gasoline engines of the same size.
The AGCO ST30’s engine uses indirect injection to deliver fuel into the combustion chamber. Indirect injection is known for smoother and quieter operation, especially in smaller engines.
Since the tractor is older, its emissions controls are basic compared to modern standards. It does not feature advanced emissions after-treatment systems.
This usually means the tractor is classified around the EPA’s Tier 0 or unregulated emissions tier for off-road vehicles. Tractors without advanced emission systems are easier to maintain but may not meet newer environmental regulations for some areas.
The engine’s cooling and combustion systems help keep emissions manageable, even without modern control devices.
Cylinders / Displacement
The engine has three cylinders, arranged in a line (inline 3).
Having three cylinders makes the engine lighter and simpler than four-cylinder options. This configuration is common in compact tractors.
The displacement is 1.5 liters (1,498 cubic centimeters, or cc). Displacement refers to the total volume the pistons move inside the cylinders from top to bottom.
This 1.5L size offers a good mix of power and fuel efficiency for utility tasks.
A 3-cylinder diesel in this size range gives you reliable torque for PTO work and light field duty, without burning much fuel.
This engine design also tends to run smoothly at constant rpm and is less likely to stall under load.
Rated Horsepower (Gross & Net)
The gross rated horsepower for the AGCO ST30’s engine is 30.3 hp (22.6 kW), measured at 2,500 engine rpm. Gross horsepower reflects the engine’s output without any accessories attached.
The net engine horsepower is slightly lower, at 29.1 hp (21.7 kW).
Net horsepower accounts for the losses caused by the alternator, water pump, and other engine-driven equipment.
The PTO horsepower is also important, as it’s what you get to run implements.
For gear-drive versions, expected PTO horsepower is around 24.5 hp (18.3 kW).
These horsepower ratings help you match the ST30 to your needs, whether you’re mowing, tilling, or performing light loader work.
Peak Torque (Nm @ rpm)
Torque is essential for jobs requiring pulling or heavy PTO loads. The AGCO ST30’s engine produces strong torque at lower rpm, typical of compact diesel tractors.
Exact peak torque numbers are harder to find for this specific model, as they’re not always well-documented.
However, based on the engine’s size and horsepower, you can expect peak torque in the range of approximately 75-85 Nm (Newton-meters) produced at around 1,800 to 2,000 engine rpm.
This means you get good pulling power and steady operation when under load, like plowing or running tougher implements.
A good torque curve lets the engine keep steady rpm, which prevents stalling and increases reliability during farming tasks.
Compression Ratio
The Iseki 1.5L diesel engine in the ST30 uses a high compression ratio, typical for indirect injection diesels.
The compression ratio is a measure of how tightly the engine squeezes the air-fuel mixture before ignition. For this engine, the ratio is around 22:1.
A higher compression ratio is important in diesel engines because it helps ignite the fuel with heat generated by compression, not a spark plug.
This high compression helps give you better fuel efficiency and more low-end torque, which is ideal for heavy work at low rpm.
However, it also means that the engine must be well maintained, especially regarding oil quality and air filter cleanliness, to prevent wear.
Cooling System & Capacity
The cooling system on the AGCO ST30 is liquid-cooled, which is more effective and consistent than air-cooled systems, especially for extended use.
Coolant flows through passages in the engine block and head, drawing heat away and sending it to the radiator, where a fan helps dissipate the heat.
This system helps prevent overheating during long work sessions or heavy-duty use.
The coolant capacity for the engine is typically around 6.1 gallons (23.1 liters).
The higher capacity means the engine maintains a stable temperature, reducing the risk of overheating and extending the lifespan of engine parts.
Routine checks of coolant levels and radiator condition are important.
A dirty air filter can cause the engine to run hotter, so keeping both the air filter and cooling system clean is key to optimal performance.
AGCO ST30 Engine Specifications Table
| Item | Specification | Details/Notes |
|---|---|---|
| Engine Make & Model | Iseki 1.5L, 3-cylinder, diesel | Naturally aspirated |
| Fuel Type & Emissions Tier | Diesel, Indirect Injection / Tier 0 | Older emission standard |
| Cylinders / Displacement | 3 / 1.5 L (1,498 cc) | Inline configuration |
| Rated Horsepower (Gross) | 30.3 hp (22.6 kW) @ 2,500 rpm | Factory rating |
| Rated Horsepower (Net) | 29.1 hp (21.7 kW) | With accessories |
| PTO Horsepower (Gear) | 24.5 hp (18.3 kW) | For running implements |
| Peak Torque (Estimated) | ~75-85 Nm @ 1,800-2,000 rpm | Typical for engine size |
| Compression Ratio | 22:1 | Indirect injection diesel |
| Cooling System / Capacity | Liquid-cooled / 6.1 gal (23.1 L) | Radiator and water pump |
| Air Filter | Replaceable, accessible | Keeps engine running clean |
Power Take-Off (PTO)
The AGCO ST30 offers several PTO options suited for different types of equipment. You can work with rear and optional mid PTOs, making it flexible for various attachments and tasks.
Claimed PTO Horsepower
The AGCO ST30 features a 30 horsepower engine. For its PTO, actual delivered horsepower may be slightly less, typically around 25 to 27 hp at the rear PTO shaft, depending on testing standards and drivetrain losses.
This level of PTO horsepower is well-matched to many implements like rotary cutters, tillers, and small mowers. You will find that the available power makes the ST30 capable for most light to medium tractor tasks.
When you use the mid PTO, the power available is slightly less than at the rear. This is important if you run mid-mount mowers or other implements that need significant power.
PTO Type (Independent / Live / Economy)
The AGCO ST30 comes with different PTO types, depending on the specific model and transmission. The standard rear PTO is “live” with a gear transmission model, while the hydrostatic version offers an “independent” PTO.
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Live PTO (Gear Transmission): Lets you operate the PTO by depressing or releasing the clutch in stages. You can run your implement while still stopping or slowing the tractor.
-
Independent PTO (Hydrostatic Transmission): Run or stop the PTO at any time, regardless of tractor movement. This is useful for frequent start-stop implement work.
The rear PTO on both models uses a mechanical engagement system for reliability and simple operation. An optional mid PTO can be equipped and is usually driven by the same type selected for the main PTO, adding flexibility for additional implements.
PTO Speeds (540 / 1 000 rpm)
The ST30’s rear PTO operates at 540 rpm, which is the standard speed for most compact tractor implements in North America. The PTO is set to reach this speed at approximately 2327 engine rpm.
If you choose the optional mid PTO, it normally runs at 2000 rpm. This mid PTO speed matches mid-mount mowers and some specialty implements designed for compact tractors.
Both rear and mid PTOs use the common 1 3/8-inch shaft size, making it simple to fit a range of attachments. The tractor does not offer a 1,000 rpm economy PTO, which is common for larger or specialty tractors only.
| Feature | Specification | Notes |
|---|---|---|
| Engine HP | 30 hp | |
| Claimed PTO HP | ~25–27 hp (rear PTO) | Slightly less at mid PTO |
| Rear PTO Type | Live (gear) / Independent (hydrostatic) | |
| Rear PTO Speed | 540 rpm @2327 engine rpm | Standard North American speed |
| Shaft Size (Rear/Mid PTO) | 1 3/8-inch (35 mm) | Common for compact implements |
| Mid PTO Option | Yes (optional) | 2000 rpm |
| Economy PTO | Not available |
Transmission & Drivetrain
The AGCO ST30 tractor uses a transmission and drivetrain built for utility and everyday farm work. You get options for both gear and hydrostatic types, plus strong features for traction and control.
Transmission Type (Syncro, Powershift, CVT, HST)
You can choose between a 9-speed gear transmission (also called a synchro-shuttle) and a hydrostatic transmission (HST) on the AGCO ST30.
The 9-speed gear transmission uses gears that you shift manually. This type is reliable and gives you full control over the speed and power to the wheels.
It’s good for jobs where you want a set speed or when pulling heavy loads. The hydrostatic (HST) option allows for smooth, step-less speed changes, making it easier if you have to shift directions often or work around tight spaces like barns.
The HST transmission is popular for loader work because of its easy forward/reverse pedal control. Both transmissions use a foot clutch for disengaging the engine from the drivetrain when shifting.
Number of Gears / Ranges
If you pick the gear transmission, you get 9 forward speeds and 3 reverse speeds, arranged in three ranges: low, medium, and high. Each range gives you flexibility for different tasks, whether you are plowing fields at low speed or transporting equipment at higher speeds.
The hydrostatic model handles speed differently. You get infinite speed selection in each range, which means you can adjust your speed smoothly without shifting gears.
Usually, these tractors have two or three HST ranges (low, mid, high), so you can match the power and speed to the job. This range setup helps maximize engine power and fuel efficiency while letting you adapt quickly to field or yard conditions.
Top Transport Speed
For moving the tractor from one spot to another, the AGCO ST30 offers a top transport speed of about 13-15 mph (21-24 km/h), depending on the transmission type.
With the 9-speed gear version, you’ll get slightly higher speeds in high range, which can help if you need to drive between locations. The hydrostatic transmission usually has a lower top speed compared to the gear type, but you gain the advantage of easier speed adjustments and more comfort during slow-speed, precision tasks.
These transport speeds are suitable for most small farm roads or properties and help keep your tasks running on schedule.
Drive (2WD / 4WD / AWD)
The AGCO ST30 is most often equipped with four-wheel drive (4WD), sometimes listed as MFWD (Mechanical Front Wheel Drive).
This means that power goes to both the front and rear wheels for improved traction, especially useful in muddy fields, snowy areas, or when pulling heavy loads. You can find some versions in two-wheel drive (2WD), but 4WD is much more common and recommended for diverse terrain.
Having 4WD increases your ability to work year-round and tackle hills or slippery spots that might stop a 2WD model.
Differential-Lock & Final Drives
To help with tough conditions, the AGCO ST30 comes with a differential lock. This feature lets you lock the rear axle so both wheels turn together, giving the best grip on mud or uneven ground.
You engage the differential lock using a pedal by your heel, so you can activate it quickly without stopping the tractor. The final drives use a robust gear reduction setup, which increases torque and helps you maintain traction and avoid wheel slip.
| Feature | Option/Spec | Details |
|---|---|---|
| Transmission Types | 9-Speed Gear / Hydrostatic (HST) | Manual gear shifting or infinite HST speeds |
| Gear Range | 9F/3R (Gear), 2–3 Range (HST) | Three gear ranges in gear, two/three in HST |
| Top Transport Speed | 13-15 mph (21-24 km/h) | Highest in 9-speed gear; HST slightly lower |
| Drive Type | 2WD / 4WD (MFWD) | 4WD standard, 2WD less common |
| Differential Lock | Yes | Foot pedal-operated, rear axle |
| Final Drive | Gear reduction type | Durable for traction and torque |
Steering & Brakes
The AGCO ST30 tractor uses a combination of reliable steering and braking systems to provide control and safety in the field. Proper steering and brake systems help you manage the tractor in tight spaces and during demanding tasks, especially when working with loads or on uneven ground.
Steering System (Hydrostatic / Power-Assisted / Mechanical)
The AGCO ST30 is equipped with hydrostatic power steering. This system makes it easier for you to steer, even at low speeds or when carrying heavy attachments.
Hydrostatic power steering uses hydraulic pressure to reduce the effort needed to turn the steering wheel, allowing for smoother and quicker responses. With this type of steering, you experience less fatigue over long hours.
The system is especially helpful during frequent turns or when navigating around obstacles. Unlike fully mechanical systems, hydrostatic steering doesn’t transfer as much road shock to your hands, giving you better comfort and control.
Key benefits:
- Reduced steering effort
- Smoother operation
- Improved precision during tasks
Turning Radius (With Brakes)
The turning radius of the AGCO ST30, especially when using brakes, is competitive for its class. You can expect a tight turning circle that allows for easy maneuvering in confined areas such as barns, orchards, and between crop rows.
When you apply the individual brakes, the tractor can pivot more sharply. This makes it easier to complete headland turns and reposition the tractor quickly.
The minimized turning radius is a major advantage in tasks like mowing or loader work, where space is limited. A precise turning radius helps minimize crop damage and improves efficiency.
Service Brakes (Wet Disc, Dry Drum, etc.)
The AGCO ST30 uses wet disc brakes. Wet disc brakes run in an oil bath, which helps keep them cool and reduces wear over time.
This type of brake offers more consistent stopping power than dry drum brakes, especially during long working days or in muddy conditions. You get responsive braking performance in both wet and dry situations.
Wet disc brakes are known for low maintenance needs because the braking parts are less likely to overheat or accumulate dust and debris. This extends the life of the brake system and maintains reliability.
Advantages include:
- Longer service intervals
- More effective braking in all conditions
- Quieter operation
Parking Brake Type
The parking brake on the AGCO ST30 is typically a mechanical type, integrated with the main brake system. When you engage the parking brake, it locks the brakes in position to prevent the tractor from rolling, even on slopes.
You activate the parking brake through a simple hand lever, which is easy and reliable to use. Mechanical parking brakes offer a straightforward design with fewer chances for failure compared to more complex systems.
Having a secure parking brake is important for safety when the tractor is left stationary. It helps prevent accidental movement and gives peace of mind when parking on uneven ground.
| Feature | Type/Description | User Benefit |
|---|---|---|
| Steering System | Hydrostatic Power Steering | Effortless, precise control |
| Turning Radius (With Brakes) | Tight radius using individual brakes | Easy maneuvering in close spaces |
| Service Brakes | Wet Disc Brakes | Consistent, low-maintenance stops |
| Parking Brake | Mechanical, hand lever operated | Secure holding on all terrain |
Cab & Operator Station
The AGCO ST30 is built with operator safety and comfort as major priorities. Features like a rollover protection structure, adjustable seat, and open design focus on usability for many types of fieldwork.
ROPS / Cab Option
The AGCO ST30 comes from the factory with a Rollover Protective Structure (ROPS) as its standard safety feature. This is a sturdy frame that surrounds you, protecting you in case of a rollover.
The ROPS meets industry safety standards and can be folded down for storage or working under low clearances. You do not get a fully enclosed cab with the ST30.
Instead, it is an open-station tractor, which means you get excellent visibility on all sides. This is useful for tasks that need close attention to your surroundings, like mowing or loader work.
The open design allows for easy entry and exit. If you need more protection from the weather, you can install optional canopies.
These help keep off the sun and rain but do not offer full cab enclosure. There are no factory cab options, so you will not have features like doors or windshield wipers.
Climate Control (A/C, Heater, Filter)
Since the AGCO ST30 does not provide a factory-installed enclosed cab, climate control features such as air conditioning and heating are not available as standard equipment. You are directly exposed to the outdoor weather, so your comfort depends on conditions and any add-on canopy or aftermarket cab kits.
There are no built-in air filters or pollen filtration systems on the open ROPS model. If you are working in dusty environments, you should consider wearing personal protective gear like masks or goggles.
Some operators choose to add aftermarket weather protection kits if they plan to use the tractor in colder months. These kits may include windbreaks or simple enclosures, but they require installation and are not as effective as a true cab.
Heater options are also limited to aftermarket accessories, which can be fitted if you plan to work in colder regions. Most users find the open design most comfortable in mild to warm weather.
Seat & Suspension
The tractor’s seat is designed for comfort during long field sessions. The standard seating is a high-backed, cushioned seat with basic adjustments for your weight and height.
You can slide the seat forward or back to fit your leg length, helping reduce fatigue during use. While the AGCO ST30’s seat does not have advanced suspension systems like air ride found on larger tractors, it does have a basic spring suspension.
This helps absorb some bumps and vibrations from rough terrain, offering a more stable and pleasant ride. Armrests and back support are included for extra comfort.
Replacement and upgrade seat options are available if you want even more comfort, such as firmer cushions, extra padding, or weather-resistant materials. The operator’s platform is flat and uncluttered, letting you move your feet easily.
Noise Level (dB A @ Operator Ear)
The AGCO ST30 creates moderate engine noise typical of compact diesel tractors. Though the exact decibel reading at the operator’s ear is not published by the manufacturer, it is generally in the range of 80-85 dB(A) when running at typical working speeds.
This level of noise is similar to a busy street or a gas-powered lawn mower. Hearing protection is recommended for long hours of operation to avoid ear fatigue.
Since there is no enclosed cab, you do not have sound insulation from the engine or external noises. Some users add a canopy, which can slightly muffle direct sound from above.
The open ROPS ensures airflow but does not reduce noise. Keeping headphones or ear plugs handy is a good idea.
| Feature | Standard Option | Available Upgrades | Key Details |
|---|---|---|---|
| ROPS / Cab | Open ROPS | Aftermarket canopy | No enclosed cab; basic frame for safety |
| Climate Control | None | Aftermarket kits | No A/C, heater, or filters built-in |
| Seat & Suspension | Cushioned, spring | Upgraded seat | Sliding seat, basic suspension, wide platform |
| Noise Level (@ ear) | 80-85 dB(A) est. | Hearing protection | Hearing protection recommended; no insulation |
Hydraulics
The AGCO ST30’s hydraulic system is key for running implements, steering, and completing daily tasks. Here you will find the exact details for the hydraulic system, pump flows, pressure, and remote valve options.
| Feature | Specification |
|---|---|
| System Type | Open Center |
| Implement Pump Flow | 12.1 L/min (3.2 gal/min) |
| Steering Pump Flow | Integrated with main pump (not separate) |
| Total Combined Flow | 12.1 L/min |
| System Pressure | 140 bar (2,000 psi) (approximate value) |
| Remote Valves | 1 Rear Remote Valve (standard), 2 (optional) |
System Type (Open-Center / Closed-Center / PFC)
The AGCO ST30 uses an open-center hydraulic system. In an open-center system, hydraulic fluid flows continuously through the pump and returns to the reservoir unless a control valve is activated.
Open-center designs are simpler and easier to maintain compared to closed-center or pressure-flow compensated (PFC) systems. This type is common in compact tractors like the ST30.
You can expect reliable operation for everyday tasks such as loader use, implement lifting, or powering simple hydraulic tools. Open-center systems are generally less complex and cheaper to repair.
This layout provides consistent flow but only moderate pressure, which matches the power and size of the ST30.
Implement Pump Flow (L Min⁻¹)
The implement pump on the AGCO ST30 delivers about 12.1 liters per minute (L/min), which is approximately 3.2 gallons per minute. This is the flow available for running implements or rear-mounted equipment such as mowers, tillers, or rear blades.
This flow rate is enough for the hydraulic cylinder movements most common on compact tractors. It is suitable for small loader operations, 3-point hitch attachments, or other light-duty hydraulic needs.
If you intend to use equipment that requires higher flow, you may find this output limiting. If you work with implements needing rapid movement or larger hydraulic motors, consider flow rates when making attachments.
Steering Pump Flow (If Separate)
On the AGCO ST30, the steering hydraulics share the same pump and flow as the main implement hydraulics. There is no separate dedicated steering pump, so all hydraulic functions rely on the same open-center flow output.
This means steering and rear implement functions may compete for pump flow, especially when used at the same time. In practice, you may notice slower implement speeds when steering is being heavily used, or vice versa.
For most applications, the shared system is not a problem and meets the needs of typical compact tractor operations. Always check hydraulic fluid levels and maintain the filter to ensure reliable steering performance.
If you add hydraulically powered accessories, be aware of the total demand on the system.
Total Combined Flow
The total combined hydraulic flow for the AGCO ST30 is 12.1 liters per minute (equal to the implement pump flow). Since there is no separate pump for steering or other functions, all hydraulic operations must share this total capacity.
This combined output supports all lifting, steering, and external hydraulic devices on the tractor. If you plan to run multiple hydraulic tools at once, keep in mind the flow may be divided based on how many functions are operating.
Monitoring combined flow is important for preventing performance drops or slow implement operation. This is especially relevant when using the loader and steering at the same time.
System Pressure (Bar / Psi)
The ST30’s hydraulic system works at a maximum pressure of around 140 bar (about 2,000 psi). This pressure supports the lifting and implement operation capabilities appropriate for a 30 hp compact tractor.
It is enough for smooth, consistent power to the 3-point hitch, loader arms, or any hydraulic implement the tractor can handle. Routine checks of hydraulic lines, connections, and seals are important, as worn components can lower pressure and reduce performance.
Always consult your manual before adjusting, and never exceed the recommended factory rating.
Remote Valves (Number & Type)
The AGCO ST30 typically comes with one rear remote hydraulic valve as standard. This valve is usually a single-acting or double-acting design, depending on dealer setup and local options.
An optional second remote valve may also be available for users who need to operate more than one implement at the same time. Remote valves allow you to control external hydraulic cylinders or motors on implements.
For most garden or landscaping attachments, a single remote is sufficient. If you plan to run a loader or multiple hydraulic implements at once, request the optional second remote when ordering or consider an aftermarket kit.
Check your tractor before purchase to see which remote options are installed, as not all units are equipped the same.
Hydraulic System Features Summary Table
| Feature | Value/Notes |
|---|---|
| System Type | Open Center |
| Implement Pump Flow | 12.1 L/min (3.2 gal/min) |
| Steering Pump Flow | Shared with implement pump |
| Total Combined Flow | 12.1 L/min |
| System Pressure | 140 bar (2,000 psi) (approximate) |
| Remote Valve(s) | 1 Rear Standard, 2 Optional |
| Suitable For | Loader work, light implements, general tasks |
Three-Point Hitch (3PH)
The AGCO ST30 tractor features a versatile three-point hitch system designed for small to medium jobs and a variety of farm implements. Its hitch type, lift ratings, and adjustment controls influence what attachments you can use and how accurately you can maintain implement depth.
Hitch Category (1 / 1N / 2 / 3)
Most AGCO ST30 tractors are equipped with a Category 1 three-point hitch. Category 1 hitches use pins with a 7/8-inch diameter and are common on compact and subcompact tractors up to 45 horsepower.
This hitch size supports a wide range of implements like mowers, tillers, and box blades. The spacing between the lower lift arms for Category 1 is 26 inches (center to center).
You may also see references to Category 1N (narrow), but the ST30 typically uses the standard Category 1 hitch. This makes it compatible with common implements available at most dealers and farm supply stores.
Lift Capacity @ Ball Ends
The rear lift capacity is a key factor in what implements you can use. The AGCO ST30 supplies rear lift at ball ends of about 1,435 to 1,600 lbs (650 to 725 kg), though some differences exist depending on year and configuration.
This means you can operate moderate-duty implements without struggle. Keep in mind that actual lifting power may be a bit less when working with heavier or extended implements, due to leverage and hydraulic system efficiency.
If your implement is close to the lift limit, you should check the owner’s manual and avoid exceeding safe weights.
Draft / Position Control
The AGCO ST30 commonly comes with position control, allowing you to set and maintain the height or depth of your attached implement. This feature makes it easier to perform jobs like grading, tilling, or mowing at consistent depths.
Position control is useful for most landscaping and light field work. Some tractors also offer draft control—which automatically adjusts the hitch height based on soil resistance—but this feature is not always standard on the ST30.
Check your specific model or contact a dealer to confirm if draft control is equipped. Control levers are usually located beside the operator’s seat for easy adjustment.
Top-Link Sensing (Yes/No)
Top-link sensing is not usually found on the AGCO ST30. This advanced feature, common on higher horsepower tractors, enables the top link of the hitch to measure force changes and adjust the hitch automatically.
Because the ST30 is intended for lighter work, it uses more basic control systems. If you require top-link sensing for specialized tasks, you may need to consider a larger tractor model or aftermarket adaptations.
For most uses with the ST30, the absence of top-link sensing will not hinder standard field, property, or landscaping tasks.
| Feature | Specification | Details |
|---|---|---|
| Hitch Category | Category 1 | 7/8″ pins, 26″ arm width; compatible with common implements |
| Lift Capacity | 1,435–1,600 lbs @ ball ends | Varies by exact model and configuration |
| Control Type | Position control (standard), Draft control (optional) | Maintains implement height; draft control varies |
| Top-Link Sensing | No | Not included on ST30 models |
| Rear Hitch Type | 3-point (Type I) | Standard system for most light to mid-duty tasks |
Axles & Load Limits
Knowing the axles and load limits for the AGCO ST30 tractor helps you use it safely and efficiently. By understanding the front and rear axle ratings as well as the final-drive type, you can avoid overloading the tractor and damaging its key components.
| Feature | Value | Description |
|---|---|---|
| Max Front-Axle Load | Not published | Typical for compact tractors in this class |
| Max Rear-Axle Load | 1898 kg (4186 lbs) | Manufacturer published max weight |
| Final-Drive Type | Flange rear axle | Fixed design for stability and load distribution |
Maximum Front-Axle Load (kg)
The front axle on the AGCO ST30 is built to handle steering and support the front of the tractor during heavy work. While the specific maximum front-axle load is not published in official sources, it is important to avoid overloading this axle, especially when using a front-end loader or adding front weights.
Compact tractors in the 30 hp class typically have a robust front axle suitable for moderate implements and light loader work. If you plan to use the tractor with heavy front attachments, distribute the load carefully to keep front-axle stress within safe limits.
Check for signs of excessive stress, such as uneven tire wear or steering trouble. Maintaining proper tire pressure and axle lubrication will help extend the life of the front axle.
Maximum Rear-Axle Load (kg)
The rear axle of the AGCO ST30 is rated for a maximum weight of 1898 kg (4186 lbs). This figure includes the weight of the tractor, operator, attachments, and any additional load carried or towed.
Stay within this weight limit to prevent damage to the rear axle, differential, and rear housing. Overloading can cause failure of key components or reduce overall tractor stability.
The rear lift capacity at the ends is approximately 899 kg (1984 lbs), while at 24 inches behind the lift point, it can handle 544 kg (1201 lbs). These numbers are important when attaching implements or carrying heavy loads on the three-point hitch.
Monitor rear tire inflation and wheel lug tightness, especially if using maximum load capacity regularly.
Final-Drive Type
The AGCO ST30 uses a flange rear axle as its final-drive type. This design provides a stable connection for the wheels and is common in compact tractors.
A flange axle adds strength and stability, helping the tractor maintain traction under varying conditions. This type of final drive distributes weight evenly, supporting the tractor’s total load and preventing uneven stress on the driveline.
Final drives are critical for transferring engine power to the wheels. Keeping this area well-lubricated and free of debris will help ensure smooth operation.
If you plan to run the tractor for extended periods under heavy loads, inspect the final-drive area regularly for leaks or unusual wear.
Tires & Track Options
You have multiple choices for tires and traction devices on the AGCO ST30 Tractor. Factory options help you match the tractor to various field or landscaping tasks and ground conditions.
Standard Front Tire Size (Ag / Turf / Industrial)
The AGCO ST30 offers different front tire setups for specific jobs. Standard agricultural (Ag) tires are sized at 6.00-14, delivering solid grip in gardens and on soft soil.
Lawn or turf tires use a 24×8.50-12 size, designed to protect grass and provide smoother movement without causing damage. If you need a more rugged solution, you can look for industrial tires, which fit the same basic specs but use a heavier tread.
Ag tires give you traction in the field, while turf tires help avoid tearing up lawns. Choose based on your primary tasks.
Standard tire pressure recommendations and upkeep are important to get the most from your tires and to keep the tractor steady.
Standard Rear Tire Size
For rear tires, the AGCO ST30 typically uses 12.4-16 Ag tires as standard. These are larger and wider than the front tires, giving better traction and stability, especially when pulling or carrying loads.
If you want something for delicate surfaces, rear turf tires come in 315/80D-16 size. These are ideal for mowing or working on finished lawns.
Wider rear tires mean a better grip and help spread the tractor’s weight to reduce soil compaction. There are also choices to suit sand, mud, or hard-packed fields.
Optional Duals / Tracks / Flotation Kits
AGCO ST30 owners seeking more traction can consider optional add-ons. While factory-fitted duals are less common on compact models like the ST30, you can add aftermarket kits that allow you to mount extra wheels alongside the standard rears for improved grip in muddy conditions.
Track kits are available through some dealers, giving your tractor a wider footprint for soft or loose ground. Flotation tires or special flotation kits are also an option, providing extra width and surface area to reduce rutting.
Always check compatibility with your particular ST30 variant to ensure safety and performance.
| Option | Front Tires | Rear Tires | Purpose | Notes |
|---|---|---|---|---|
| Standard Ag Tires | 6.00-14 | 12.4-16 | Best traction, field work | Most common for plowing, tilling, and field jobs |
| Turf/Lawn Tires | 24×8.50-12 | 315/80D-16 | Prevents turf damage | Suited for mowing, landscaping, and delicate surfaces |
| Industrial Tires (Optional) | Same as Ag (varies by brand) | Same as Ag (varies by brand) | Heavy-duty, construction use | For heavier loads and mixed surfaces |
| Dual Rear Tire Kit (Optional) | N/A | Adds second set (varies) | Doubles traction, soft/muddy ground | Usually aftermarket option |
| Track Kit (Optional) | Replaces wheels | Replaces wheels | Maximum flotation, loose surfaces | Specialized and requires specific fitment |
| Flotation Kit (Optional) | Wider tire setup | Wider tire setup | Reduces soil compaction, wet fields | Increases surface area contact for soft soils |
Dimensions & Weight
The AGCO ST30 is built to handle a variety of tasks with a compact footprint. Its measurements impact where you can store it, how you operate it, and which jobs it handles best.
| Feature | Measurement |
|---|---|
| Wheelbase | 65.6 inches (166 cm) |
| Overall Length | 116.5 inches (295 cm) |
| Overall Width (Min Tread) | 55.5 inches (140 cm) |
| Height to ROPS | 79.3 inches (201 cm) |
| Ground Clearance | ~12 inches (estimate) |
| Shipping Weight | 2,594 lbs (1,176 kg) |
| Operating Weight (Wet) | ~2,700 lbs (estimate) |
Wheelbase
The wheelbase on the AGCO ST30 measures 65.6 inches (166 cm). This is the distance between the front and rear axles.
A longer wheelbase like this gives you more stability when driving on uneven land or when carrying heavy loads. If you often work on hills or rough fields, the wheelbase helps reduce the risk of tipping over.
It also affects how tightly you can turn, but the ST30 has a manageable balance between maneuverability and stability.
Overall Length
Your AGCO ST30 is 116.5 inches (295 cm) long from front to back. This makes it easy to store in standard garages or sheds.
It’s short enough to transport on standard-sized trailers if needed. Knowing the length is useful when planning parking space or transporting, especially if you add attachments that could extend this figure.
Overall Width (Minimum Tread)
The tractor is 55.5 inches (140 cm) wide at its narrowest tread setting. This compact width makes it easier for you to drive through tight gate openings, glide between crop rows, or maneuver in small barnyards.
If you change the rear wheel settings for wider treads, the width can increase. Most jobs can be handled at this minimum width.
Height to ROPS / Cab
The height to the top of the ROPS (Roll-Over Protective Structure) is 79.3 inches (201 cm). Make sure to measure your barn or garage doors before parking indoors, as you need at least this much clearance.
If you have low tree limbs, bridges, or roofing, keep the height in mind to avoid any accidental damage.
Ground Clearance
You get about 12 inches of ground clearance with the AGCO ST30, though the exact number may vary slightly due to tire choices or attachments. This helps you avoid getting stuck on uneven fields, rocks, and roots.
Higher ground clearance also helps when working in muddy or soft soils where a lower tractor might drag or get damaged.
Shipping Weight
The shipping weight of the AGCO ST30 is 2,594 lbs (1,176 kg) without fluids or attachments. If you’re arranging delivery or need to move the tractor, this is the dry weight to use when planning trailers or lifts.
It’s lighter than some compact tractors, so transport should be easier with most equipment rated for 3,000 lbs or more.
Operating Weight (With Fluids)
When loaded with fuel, oil, coolant, and other fluids, the operating weight increases to about 2,700 lbs (estimated). This wet weight includes what you’ll actually have when the tractor is ready to use in the field.
It’s important for calculations related to soil compaction, trailer loading, and overall tractor performance. Be sure to check that your trailer or storage surface can handle this total weight to prevent accidents or damage.
Fuel & Fluids
Reliable operation of your AGCO ST30 tractor depends on using the correct type and amount of fuel and fluids. Paying close attention to these details helps your engine and hydraulic systems perform well and last longer.
| Fluid Type | Capacity | Specification/Type | Notes |
|---|---|---|---|
| Diesel Fuel Tank | 7.4 gallons | Diesel, indirect injection | Top off frequently to avoid air entry |
| DEF Tank | Not required | N/A | Not equipped with DEF system |
| Engine Oil | 4.2 quarts | 15W-40 or per manual | Check regularly and change as needed |
| Hydraulic/Trans Oil | 5.0–6.0 gal | AGCO Multi-G or equiv. | Use manufacturer-recommended fluid |
Fuel-Tank Capacity
The AGCO ST30 tractor is equipped with a diesel fuel tank sized for moderate field work. The tank holds about 7.4 gallons (28 liters) of diesel, which supports several hours of operation under average load.
Diesel engines like the one in the ST30 use an indirect injection system. It’s important to use clean, high-quality diesel to avoid clogging injectors.
It is wise to keep the tank above a quarter full to minimize condensation and air in the fuel lines. Regularly check for debris or contaminants in your fuel system to help keep your engine running smoothly.
DEF-Tank Capacity (If Applicable)
The AGCO ST30 does not require a DEF (Diesel Exhaust Fluid) tank. This model features a straightforward diesel engine that meets emission standards without selective catalytic reduction (SCR) systems found on newer, larger tractors.
You do not need to add, monitor, or refill DEF for this model. There are no DEF sensors, tanks, or warning lights to maintain.
Engine Oil Capacity
Your AGCO ST30 tractor’s engine holds about 4.2 quarts (4.0 liters) of oil. The recommended oil is usually 15W-40 for most temperate locations, but always confirm with your owner’s manual for specific conditions.
Regular oil checks and timely oil changes are vital to protect the three-cylinder Iseki diesel engine. Dirty or low oil can cause serious damage, so keep the level near the full mark on the dipstick.
Use quality oil filters at every oil change. Change oil more frequently if you are operating in dusty, heavy-load, or stop-and-go conditions.
Hydraulic/Transmission Oil Capacity
The hydraulic and transmission systems on the ST30 are combined, sharing a full oil supply. The capacity is between 5.0 and 6.0 gallons (19–23 liters), depending on optional equipment and axle configuration.
Use only manufacturer-approved AGCO Multi-G or compatible hydraulic/transmission oil for best results. Always change filters and fluids according to recommendations.
Check the fluid regularly for signs of contamination. Warm hydraulic oil expands, so always check levels after the tractor has idled briefly.
Low or dirty hydraulic oil can cause poor shifting, slow loader response, or even long-term damage.
Electrical System
The AGCO ST30 tractor uses a simple 12-volt electrical system designed for reliability and ease of maintenance. Important components include the battery, alternator, and electrical ground system, each with specific features to support starting, lighting, and engine function.
| Feature | Details |
|---|---|
| Ground Type | Negative |
| Alternator/Charging | 12V Alternator |
| Charging Output (Amps) | 35-40 Amps (Typical) |
| Battery Voltage | 12 Volts |
| Battery CCA Rating | 430-500 CCA |
Ground Type (Negative / Positive)
The AGCO ST30 tractor uses a negative ground system. Your battery’s negative terminal connects directly to the tractor’s chassis, which acts as the common ground for the whole electrical system.
This is the standard configuration for most modern tractors and vehicles. Negative ground setups help prevent electrical short circuits and reduce corrosion on electrical contacts.
When installing or replacing electrical components, always connect the negative battery terminal last to lower the risk of accidental shorting. Most diagnostic tools and accessories are also designed to work with negative ground systems, making future repairs or upgrades easier for you.
You’ll notice that the wiring paths return to the chassis, which means cleaner cable management and fewer potential problems with voltage loss. Make sure all grounding points are clean, tight, and free of rust or paint for the electrical system to work efficiently.
Alternator / Charging System
Your AGCO ST30 comes equipped with a 12-volt alternator that serves as the tractor’s charging system. The alternator keeps the battery charged and supplies electrical power while the engine is running.
This is important for running lights, dashboard instruments, and starter circuits. The alternator includes an internal regulator that manages charging to prevent overcharging the battery.
You’ll likely find the alternator mounted to the side of the engine, driven by a belt. If you notice dim lights or slow cranking, it could be a sign the alternator isn’t performing properly.
Regularly check the alternator belt for wear and proper tension, as a loose or cracked belt can lead to charging issues. The alternator adds reliability by ensuring your battery stays powered for starting, even after long periods of use with lights or accessories running.
Charging Output (Amps)
The charging system on the AGCO ST30 typically delivers between 35 to 40 amps. This level of output is enough for starting the engine, running external lights, and powering electrical accessories that you might use in the field or around your property.
High-amperage charging is useful if you add extra lighting, a cab heater, or other tools that need power. However, it is not meant for heavy-duty electrical add-ons, so you should avoid overloading the system with high-draw devices.
If accessories draw more current than the alternator can supply, your battery will slowly lose charge, especially during long night jobs. Always keep track of all electrical loads and try not to exceed the alternator’s rated capacity.
Battery Voltage
The AGCO ST30 uses a 12-volt battery as the core of the electrical system. This is the standard for most tractors in its horsepower range.
A single battery is mounted under the hood, supplying power to the starter, ignition, and all electrical circuits. Always install a battery with the correct voltage to avoid damaging sensitive electronics and wiring.
Check the battery terminals regularly for tight connections and clean off any corrosion as this can reduce power delivery. You should disconnect the negative terminal first when changing the battery to prevent short circuits.
When you leave the tractor unused for long periods, a battery tender or trickle charger can help keep the voltage up so you can start the tractor reliably even after storage.
Battery CCA Rating
The tractor’s battery is rated for around 430-500 Cold Cranking Amps (CCA). CCA is the measure of how well a battery can deliver power at low temperatures—crucial for starting in cold weather when engines need more power to turn over.
Choosing a battery with the right CCA ensures the starter can work efficiently, especially in winter or in cooler climates. Lower CCA might cause the engine to crank slowly or not start at all.
A higher CCA battery can offer more reliability, but only if it fits the battery tray and cable setup. Before replacing the battery, verify the CCA rating in your owner’s manual or on the old battery’s label.
Avoid going below the recommended CCA, as this could affect starting reliability and overall electrical performance.
Total Cost of Ownership Metrics
A close look at major ownership costs for the AGCO ST30 helps you budget and plan for each year you use the tractor. Maintenance, repairs, fuel, and value loss are the main factors shaping these expenses.
| Metric | Value/Details |
|---|---|
| Service Interval | 50, 100, 250, 500 hrs (see specifics below) |
| Annual Maintenance Cost | $800 – $1,200 typical for regular use |
| Depreciation per year | 8–12% per year over first 5 years |
| Fuel Consumption (Rated Load) | 3.7 to 4.3 L/hr (@ 75–100% load) |
Recommended Service Intervals
Your AGCO ST30 needs regular service to keep running reliably and to avoid costly repairs. The typical oil change interval is every 100 hours.
Hydraulic and transmission fluids should be checked at 50-hour intervals and replaced every 500 hours. Air and fuel filters usually require changing at 250-hour marks.
Greasing all fittings every 50 hours of operation helps prevent wear on moving parts. Tire inspection and tightening of bolts and linkages should be done during every major service.
Always follow the factory manual for exact timing. Failing to meet these intervals can shorten the tractor’s life and increase costs.
Estimated Annual Maintenance Cost
Annual maintenance for the AGCO ST30 generally falls between $800 and $1,200 with average use, assuming around 400 working hours per year. This covers routine service items like oil, filters, fluids, belts, and basic parts replacement.
If you hire mechanics for all work, costs may rise. Frequent or heavy use, or working in dusty or muddy conditions, tends to increase expenses by 10–20%.
Unexpected repairs—such as for the clutch, alternator, or cooling system—can add several hundred dollars, but these are not common each year.
Depreciation Curve (% Per Year)
The AGCO ST30 typically depreciates at a rate of 8–12% per year for the first five years. After this period, depreciation usually slows, as older models tend to hold their value if well maintained.
Example: If your tractor is worth $16,000 new, after five years using 10% average annual depreciation, estimated value may be ~ $9,500–$10,000. Market demand, hour meter readings, and visible condition will affect actual resale price.
Keeping full service records and storing the tractor under cover slows value loss.
Fuel Consumption @ Rated Load (L Hr⁻¹)
At a rated load, the 30-hp diesel engine of the AGCO ST30 consumes about 3.7 to 4.3 liters per hour.
Lighter loads may drop usage closer to 3.0 L/hr.
High-speed or heavy PTO tasks can push rates to the upper end.
Fuel consumption depends on how hard you work the tractor and the type of implements used.
Maintenance condition, such as clean filters and injectors, optimizes efficiency.