AGCO ST35 Tractor 33 hp Specifications, Features, and Performance Review
AGCO ST35 Tractor 33 Hp
The AGCO ST35 is a compact utility tractor known for its 33-horsepower diesel engine and reliable four-wheel drive capability. Designed for performance and ease of use, it appeals to small farms, landscaping companies, and residential property owners needing a useful compact tractor.
Production & Identification
The AGCO ST35 was produced as part of AGCO’s ST Series of compact tractors, catering to customers needing dependable power in a smaller frame. It was built with versatility in mind, suitable for a variety of tasks such as mowing, hauling, and light tillage.
The ST35 stands out due to its 33-hp Iseki three-cylinder diesel engine, liquid-cooled for efficiency and longevity. Its standard features include four-wheel drive (MFWD), hydrostatic power steering, and differential lock for better traction.
The tractor’s model number, ST35, clearly marks its place within the ST Series, which also includes models like the ST32 and ST40. You can identify the AGCO ST35 by its compact build, prominent orange and gray AGCO livery, and the “ST35” marking on the side panels.
Manufacturer / Brand
AGCO Corporation, the manufacturer, is a well-known agricultural machinery company based in the United States. AGCO brands include Massey Ferguson, Challenger, Fendt, and Valtra, all recognized in the farming industry.
For the ST35 and other ST Series compact tractors, AGCO partnered with Iseki, a respected Japanese manufacturer specializing in compact tractors. The tractors were sold under the AGCO label but were designed and built by Iseki to AGCO’s specifications.
Model Number / Series
The model number, ST35, designates this tractor as a part of the AGCO ST Series. The ST Series, produced in the early 2000s, includes several compact tractor models with horsepower ratings between 32 and 40.
Other related models in the lineup include:
- ST32: Entry-level compact tractor, slightly less powerful.
- ST35: Mid-range compact model with a 33-hp engine.
- ST40: More powerful compact model in the ST Series.
These models all share similar design cues but differ mainly in engine horsepower and standard features. The model number can be found on the side of the hood.
Factory of Manufacture
The AGCO ST35 was assembled by Iseki in Japan. Iseki has decades of experience in compact and utility tractor manufacturing.
The choice of the Japanese factory guaranteed high-quality assembly, attention to detail, and solid engineering. Japanese manufacturing is known for precision and durability, making these compact utility tractors reliable for owners across the world.
AGCO imported these units to North America, branding them under the AGCO name for sale through its dealer network.
Years Produced
Production for the AGCO ST35 began in 2001 and continued through 2004 as part of AGCO’s 2001-2004 ST Series. These years mark the full stretch during which this specific model was available at AGCO dealerships.
During this period, the demand for compact tractors grew as more small-scale operations and property owners sought tractors designed for versatility without sacrificing quality or power.
After 2004, AGCO’s compact tractor lineup shifted, and similar models continued under different branding, sometimes as Massey Ferguson compacts.
Original List Price (Launch Year)
At the time of launch, the original list price of the AGCO ST35 reflected its position as a well-equipped, mid-range compact utility tractor. In 2001, prices for new AGCO ST35 units typically ranged from $16,000 to $18,000 USD, depending on features and dealer options.
The ST35 was priced to compete with other compact tractors in the same horsepower class from brands like John Deere, Kubota, and Massey Ferguson. Used market values today are much lower, often between $8,600 and $10,000 depending on condition and hours.
Serial-Number Location
The serial number is critical for identification, warranty purposes, and tracking the production year. On the AGCO ST35, you can find the serial number stamped on a metal plate.
This metal plate is typically mounted on the right side of the tractor frame, near the front axle or just below the operator’s seat area. Always check the serial number before purchasing a used tractor to confirm model year and history.
If in doubt, reference your owner’s manual for the exact serial number location or reach out to an AGCO/Massey Ferguson dealer for guidance.
AGCO ST35 Tractor 33 Hp Quick Reference Table
| Category | Details |
|---|---|
| Model Number / Series | ST35, part of AGCO ST Series (ST32, ST35, ST40) |
| Production Years | 2001 – 2004 |
| Manufacturer / Brand | AGCO (assembled by Iseki, Japan, sold under AGCO & sometimes Massey Ferguson) |
| Engine Power | 33 hp (Gross), 31.6 hp (Net), Iseki 3-cylinder diesel |
| Factory Location | Iseki factory, Japan |
| Original List Price (2001) | $16,000 – $18,000 USD |
| Serial Number Location | Right frame near front axle or under seat area |
| Drive Type | 4WD (MFWD), compact utility tractor |
| Related Models | ST32, ST40, other compacts in AGCO/Massey Ferguson line |
Engine Specifications
The AGCO ST35 tractor is powered by a proven 3-cylinder diesel engine. This section explores its model, fuel system, dimensions, power output, torque, compression, and cooling system in detail.
Engine Make & Model
The AGCO ST35 uses an Iseki-built engine. Iseki is a Japanese manufacturer known for producing reliable engines for compact and utility tractors.
You will find this engine is a naturally aspirated, 3-cylinder design. It features indirect fuel injection and a dry air cleaner system.
Iseki engines are recognized for smooth operation and efficient fuel usage. This particular engine has been engineered to offer good mid-range power for consistent performance in a variety of tasks.
It is compact, which helps deliver better maneuverability for a tractor of this size.
Fuel Type & Emissions Tier
The ST35 runs exclusively on diesel fuel. Diesel engines are chosen for their better torque at low RPM and improved fuel efficiency, especially under heavy workloads.
The engine uses indirect injection, which is designed for smoother startup and operation. While the tractor dates to an era before modern emission regulations were widespread, it is generally considered to meet Tier 1 or pre-Tier 1 standards.
The lack of a turbocharger or electronic controls means emissions are higher than newer, Tier 4-compliant engines. For most uses on small farms or rural property, these standards were typical.
Cylinders / Displacement
You get a 3-cylinder setup, which helps the engine maintain smooth power delivery. This configuration is common in compact tractors for its balance of efficiency and performance.
The engine is liquid-cooled, supporting stable temperatures and consistent output even during long periods of heavy work. While the exact displacement is about 1.5 to 1.6 liters (specific value can vary somewhat depending on the market), this size gives a good blend of fuel economy and output.
This displacement range ensures the tractor can handle loader work, mowing, and other medium-duty jobs with ease.
Rated Horsepower (Gross & Net)
The AGCO ST35 delivers 33.0 horsepower gross at the engine flywheel. Net horsepower is slightly lower at 31.6 hp.
The difference between gross and net reflects the power lost to engine-driven accessories like water pumps and the alternator. PTO (Power Take-Off) horsepower is also important: claimed PTO ratings are around 26.8 hp (gear transmission) and 26.3 hp (hydrostatic transmission).
This means the tractor can operate a variety of implements, such as rotary cutters, finish mowers, and tillers without issue.
Table: Horsepower Ratings
| Specification | Value |
|---|---|
| Engine Gross HP | 33.0 hp |
| Engine Net HP | 31.6 hp |
| PTO HP (Gear) | 26.8 hp |
| PTO HP (Hydro) | 26.3 hp |
Peak Torque (Nm @ Rpm)
Iseki 3-cylinder diesel engines are built to provide strong torque, especially at lower engine speeds. Though factory ratings for the exact peak torque and RPM are not always published for these compact models, you can anticipate peak torque to fall in the range of 80–90 Nm at approximately 1800–2200 rpm.
This robust torque curve gives you better pulling power and lets you run heavy implements or tackle slopes without stalling the engine easily.
Compression Ratio
This engine uses a relatively high compression ratio for a non-turbocharged diesel, which is typical for naturally aspirated designs. The compression ratio is estimated to be between 18:1 and 19:1.
A high compression ratio improves the engine’s combustion efficiency, creating greater power and torque per unit of fuel. It also helps the engine start better in cold weather, which is important on smaller tractors with no block heaters.
Cooling System & Capacity
The ST35 engine is liquid-cooled using a radiator system. Liquid cooling gives you stable operating temperatures, even on hot days or with heavy attachments.
The coolant capacity for the system is approximately 5 to 6 liters (about 1.3–1.6 gallons), enough to prevent overheating during long hours of work. The system uses a standard water pump and thermostat to control engine temperature.
It is important to keep the radiator clean and check coolant levels regularly. This will ensure your ST35 stays running reliably during critical tasks.
Engine Specifications Summary Table
| Feature | Specification |
|---|---|
| Make & Model | Iseki 3-cylinder, Model E3CD |
| Fuel Type | Diesel, Indirect Injection |
| Emissions Tier | Pre-Tier 1 |
| Cylinders / Displacement | 3 cylinders / approx. 1.5–1.6 L |
| Cooling System / Capacity | Liquid-cooled / 5–6 L |
| Rated Horsepower (Gross) | 33.0 hp |
| Rated Horsepower (Net) | 31.6 hp |
| PTO Horsepower (Gear/Hydro) | 26.8 hp / 26.3 hp |
| Peak Torque | 80–90 Nm @ 1800–2200 rpm |
| Compression Ratio | 18:1 to 19:1 |
Power Take-Off (PTO)
The PTO system on the AGCO ST35 tractor provides the power you need for a range of implements. Its specific features impact how well it connects and runs your equipment.
Claimed PTO Horsepower
The AGCO ST35 offers a claimed PTO horsepower of around 27-28 hp. This is produced from its 33 hp engine, meaning some power is lost between the engine and the PTO, which is normal for most tractors.
You can use this PTO horsepower to run mowers, tillers, sprayers, and smaller balers. The horsepower is best for light- to medium-duty tasks, especially for smaller farms or landscaping jobs.
Knowing the exact PTO horsepower helps you match the tractor with the compatible size of implements. Always check the implement requirements to prevent overloading the PTO.
Too much load can cause the tractor or the PTO components to wear out faster.
PTO Horsepower is:
- Around 27-28 hp
- Suitable for light and medium implements
- Important for choosing correct attachments
PTO Type (Independent / Live / Economy)
The PTO on the AGCO ST35 is an independent, electro-hydraulic wet clutch system. This setup means you do not need to push the clutch pedal to start or stop the PTO.
You easily engage or disengage the PTO with a switch or lever, even when the tractor is moving. An independent PTO offers the highest level of convenience for tasks needing frequent starts and stops, such as mowing or using a tiller.
The wet clutch design means it uses fluid for cooling and lubrication, making it more durable and less likely to overheat during long work sessions.
This system is especially helpful if you attach heavy PTO implements or switch tasks often. The wet clutch also requires less frequent service than dry clutch systems.
Key points:
- Independent PTO, electro-hydraulic wet clutch
- Operates with switch/lever, not with pedal
- Easier use and better reliability for frequent operations
PTO Speeds (540 / 1 000 Rpm)
The rear PTO of the AGCO ST35 operates at 540 rpm, which is the most common speed for small to medium-sized tractors. To reach 540 rpm at the PTO, the ST35’s engine should run at about 2,389 engine rpm.
Most implements for compact and utility tractors are built for 540 rpm operation. There is no 1,000 rpm option on the ST35, so you should only use implements needing a standard 540 rpm PTO speed.
Using the correct engine speed ensures efficient power delivery and protects both the PTO and the implement from excess wear or damage. Carefully monitor your tractor’s tachometer and follow your implement’s recommendations for best performance.
PTO speed highlights:
- Single-speed 540 rpm PTO
- 540 rpm achieved at 2,389 engine rpm
- No 1,000 rpm PTO option
PTO Feature Table
| Feature | Details |
|---|---|
| Claimed PTO Horsepower | 27–28 hp |
| PTO Type | Independent, electro-hydraulic wet clutch |
| PTO Engagement | Switch or lever |
| Clutch System | Wet disc (longer life and less maintenance) |
| Rear PTO Speed | 540 rpm |
| Engine RPM for 540 PTO | 2,389 rpm |
| 1,000 rpm PTO Option | Not available |
| Best Use | Light-medium implements, frequent PTO work |
Transmission & Drivetrain
The AGCO ST35 tractor offers features designed for smooth control and strong traction. You can expect versatile options that suit a wide range of tasks, from fieldwork to hauling.
Transmission Type (Syncro, Powershift, CVT, HST)
The AGCO ST35 comes with two main types of transmissions. The standard model is equipped with a synchronized shuttle transmission.
This makes it easier for you to shift gears smoothly and efficiently, especially when changing direction frequently. There is also an option for a hydrostatic (HST) transmission.
This hydraulic system allows for variable speed control by simply pressing the pedal, which can be helpful in tasks requiring quick speed adjustments. The HST option is appreciated for its user-friendly operation, making it suitable if you want less manual gear shifting.
Both transmission types are popular for their reliability and straightforward maintenance. Your choice depends on whether you prefer the control of manual shifting or the convenience of an automatic-like feel.
Number of Gears / Ranges
If you select the synchronized shuttle model, you get 8 forward and 8 reverse gears. These are split into two main ranges—high and low.
This setup is useful when you need to match ground speed with implements or jobs that require more control. For the hydrostatic version, there are usually infinite speeds within three selectable ranges (low, medium, and high).
This gives you flexibility for slow, precise work as well as faster travel. The versatile gear selection helps you maintain efficiency whether you are plowing, mowing, or transporting loads.
You have enough options to adapt the tractor speed to most common farming or landscaping jobs.
Top Transport Speed
The maximum transport speed on the AGCO ST35 is typically around 15-18 mph (24-29 km/h), depending on tires and specific configuration. This speed helps you move quickly between job sites or fields without wasting time.
Transport speed is important if you regularly travel on roads or across larger properties. Even at higher speeds, the transmission and drivetrain remain stable and predictable, offering you safe and easy control of the tractor.
Drive (2WD / 4WD / AWD)
The AGCO ST35 is available exclusively as a 4WD (four-wheel drive) model. This means all four wheels receive power from the engine, which is valuable for traction.
If you work on rough, wet, or hilly terrain, 4WD gives you more grip and stability. 4WD also helps you avoid getting stuck in mud or on loose soil.
Heavy implements behind the tractor can be managed better with power sent to all wheels. You do not have to worry about optional two-wheel drive models—the ST35 always comes ready for tough conditions.
Differential-Lock & Final Drives
A mechanical rear differential lock comes standard on the AGCO ST35. You activate it with a lever, which forces both rear wheels to turn together.
This can be important if one wheel loses traction—engaging the lock keeps you moving in challenging spots. The ST35 uses robust final drives to transfer power from the transmission to the wheels.
Heavy-duty components ensure long life and reliable operation, even if you usually work in rough environments or with heavy loads. Maintenance is simple and does not require special tools or knowledge.
AGCO ST35 Transmission & Drivetrain Overview
| Feature | Details |
|---|---|
| Transmission Types | Synchronized shuttle (8F/8R), Hydrostatic (variable, 3 ranges) |
| Number of Gears / Ranges | 8 forward, 8 reverse, or HST infinite speeds with 3 selectable ranges |
| Top Transport Speed | 15-18 mph (24-29 km/h) |
| Drive System | 4WD (Four-wheel drive) |
| Differential Lock | Mechanical, lever-activated, rear axle only |
| Final Drives | Heavy-duty gear type, designed for durability and strength |
Steering & Brakes
The AGCO ST35 offers clear and effective controls for both steering and braking. Its combination of power steering and wet disc brakes make handling and stopping more dependable, especially in field conditions.
| Feature | Details |
|---|---|
| Steering System | Hydrostatic Power Steering |
| Origin | Made in Japan |
| Turning Radius (with brakes) | Tight, aided by split brakes |
| Service Brakes | Wet disc brakes |
| Parking Brake | Mechanical, lever-operated |
Steering System (Hydrostatic / Power-Assisted / Mechanical)
The AGCO ST35 uses a hydrostatic power steering system. This means when you turn the wheel, a pump sends fluid to a cylinder that moves the wheels smoothly with little force from you.
You do not need to fight the wheel, even when handling heavy loads or attachments. Power steering makes precise maneuvers easier in tight areas.
The system works well in fields and around buildings. Since the tractor is designed in Japan, it focuses on both reliability and long-term durability for demanding work.
Turning Radius (With Brakes)
The ST35 has a tight turning radius, which is important for working in compact spaces or turning at row ends. Using split brakes, you can make even sharper turns by braking only one rear wheel at a time.
This feature is useful for tasks such as tilling small plots, mowing, or loader work where shorter turns save time. The four-wheel-drive (4WD or MFWD) chassis gives you good control and stability during sharp maneuvers.
When you apply the brakes while turning, the tractor pivots around the braked wheel, making your turn much tighter than with steering alone.
Service Brakes (Wet Disc, Dry Drum, etc.)
The AGCO ST35 uses wet disc brakes as its service braking system. Wet disc brakes are enclosed in an oil bath, which helps them stay cool and clean.
This design increases brake life and reduces the need for frequent adjustments. Wet disc brakes deliver more consistent performance in harsh and muddy environments.
You will find the brakes reliable even after many hours of operation, especially when working in wet or dusty fields. Because of their construction, they also require less maintenance compared to dry drum brakes, letting you focus more time on your tasks.
Parking Brake Type
The parking brake on the ST35 is a mechanical brake, usually operated by lever. When you pull the lever, it locks the braking system and keeps the tractor in place even on slopes.
Mechanical parking brakes are simple and direct. They do not rely on hydraulic pressure, which makes them reliable when the engine is off.
You should always engage the parking brake before leaving the operator’s seat to prevent any unplanned movement, especially on uneven or inclined terrain.
Cab & Operator Station
The AGCO ST35 offers practical features that focus on safety, comfort, and ease of use. Designed for daily work, the layout and controls help you stay productive while supporting operator ergonomics.
| Section | Features | Details |
|---|---|---|
| ROPS / Cab Option | Open ROPS standard, cab option availability varies | ROPS installed for safety, optional cab on select models |
| Climate Control | Ventilation, heater (optional), no factory A/C | Basic comfort features, filter may be available |
| Seat & Suspension | Adjustable suspension seat, basic comfort | Sliding seat, mechanical suspension, no advanced damping |
| Noise Level | Moderate for compact tractor, not fully sealed | Approx. 80–85 dB(A) near operator depending on installation |
ROPS / Cab Option
Most AGCO ST35 tractors come equipped with an open Roll-Over Protective Structure (ROPS) as standard. This design helps protect you in the event of a rollover and is a key safety feature for compact tractors.
Depending on market and year, you may find aftermarket or dealer-installed cab options. These cabs are not always factory-installed but can be added to improve comfort and weather protection.
If you are working in areas with low-hanging branches or restricted space, the ROPS can often be folded down. For applications in harsh climates, installing a cab provides extra shelter and keeps you out of the wind and rain.
Choosing between ROPS and cab depends on your work environment. You should always ensure any cab installation still meets safety and legal requirements for tractor operation.
Climate Control (A/C, Heater, Filter)
The standard AGCO ST35 setup is open, so it does not include air conditioning. Some aftermarket or dealer-installed cabs may offer a heater for cold conditions and basic ventilation.
Heaters, when included, are usually electric or use engine coolant for warmth. Most cabs do not have factory-installed air conditioning on the ST35, so cooling is limited to opening windows or vents.
Dust filters are sometimes available with certain cabs to reduce airborne particles inside the operator space. If you use your tractor in dusty or cold environments, you may want to look for a cab with heater and filter options during installation.
These features can make long workdays more comfortable, especially for mowing or snow removal tasks. Always check what type of climate control comes with the specific cab kit or aftermarket solution you plan to install.
Seat & Suspension
You get a basic, padded operator’s seat on the AGCO ST35 with manual fore-and-aft adjustment. Most models have a mechanical suspension feature that helps absorb shocks and vibrations when moving over uneven terrain.
The seat design is straightforward, focusing on durability and ease of cleaning. Armrests and backrests provide some extra support, but advanced suspension or air ride seats are not standard.
If you plan on spending long hours on the tractor, seat upgrades are possible through aftermarket options. Suspension springs can help reduce fatigue, especially on rough ground.
Regular inspection of seat mounting and suspension hardware is a good practice to maintain comfort and safety.
Noise Level (dB A @ Operator Ear)
Operating noise levels on the AGCO ST35 are moderate for a compact tractor. With only an open station or a basic cab, expect sound readings around 80 to 85 dB(A) at the operator’s ear during typical engine speeds.
This level can rise with heavy PTO use or attachments. Aftermarket cabs may help reduce noise slightly by providing some sound insulation.
However, these cabs are not fully sealed, so noise reduction is limited compared to factory cabs on larger tractors. You may find that ear protection is helpful if you run the ST35 for long stretches.
Checking for loose panels or worn gaskets during installation can also help limit unnecessary rattles and vibrations that add to noise. Being mindful of the work environment and using hearing protection when required will help prevent hearing fatigue over time.
Hydraulics
The AGCO ST35 tractor uses a hydraulic system designed for reliability and simplicity. It delivers enough pressure and flow to handle most typical farm implements and loader attachments for its size.
System Type (Open-Center / Closed-Center / PFC)
The AGCO ST35 is equipped with an open-center hydraulic system. In this system, hydraulic fluid flows continuously through the pump and returns to the reservoir when no control valve is activated.
This simple design is easy to maintain and well-suited for most tasks you will face with a compact tractor like the ST35. Open-center systems are efficient for basic implements and offer smooth operation for lifting and moving attachments.
You do not get the advanced energy savings or responsiveness found in more complex closed-center or pressure-flow compensating (PFC) setups. The ST35’s open-center layout supports category 1 implements and loader attachments without the need for special hydraulic controls.
Implement Pump Flow (L min⁻¹)
The implement hydraulic pump on the ST35 delivers around 24 liters per minute (L/min). This flow rate is important when choosing attachments that require constant hydraulic power, such as front-end loaders or rear implements with hydraulic cylinders.
You should check that any hydraulic equipment you use does not exceed the available flow to avoid slow operation. 24 L/min is enough for most common agricultural tasks like raising a loader or operating a small backhoe.
The flow is steady, and while not as high as larger tractors, it fits well with implements meant for 33 hp compact models.
Steering Pump Flow (If Separate)
The ST35 shares a hydraulic system between steering and implement controls. There is not a fully separate steering pump.
Power steering draws from the same hydraulic circuit. The tractor is designed to ensure smooth steering even while using an implement.
You may notice that steering and implement performance can both slow a little if you demand a lot from each at the same time. For regular use—such as loader work or field jobs—steering remains light and responsive.
There is no need to manage separate hydraulic fluids or filters since the circuits are combined.
Total Combined Flow
The total combined flow for the ST35’s hydraulics system is about 24 L/min. This includes both the implement and steering demand since they use a shared pump and fluid circuit.
For most tasks, this combined flow is enough to power one or two hydraulic cylinders at a time or to operate a loader while steering. If you need to use multiple hydraulic functions together—for example, steering while lifting a heavy load—you may find the response slows down briefly.
System Pressure (Bar / Psi)
The AGCO ST35 hydraulic system operates at a maximum pressure of around 160 bar (2,300 psi). This pressure setting is typical for compact tractors in this horsepower range and is suitable for raising and lowering implements and powering cylinders.
Safety valves help protect the system from overload, but always check limits in your implement manuals. Regular checks of hoses and fittings are recommended to avoid pressure leaks.
Remote Valves (Number & Type)
The number of remote hydraulic valves on the AGCO ST35 varies by how the tractor was equipped from the dealer and by any upgrades. Most base models have one or two rear remote valves for simple hydraulic functions.
These are typically double-acting spool valves that allow hydraulic cylinders to extend and retract. If you use a loader or backhoe, you may add a mid-mount valve kit or external power beyond ports.
All remote valves are mechanically controlled and use quick-coupler connections for easy hookup. Some implements may need additional remote kits, available as bolt-on accessories.
Hydraulic System Summary Table
| Feature | Specification | Notes |
|---|---|---|
| System Type | Open-center | Continuous flow, simple maintenance |
| Implement Pump Flow | ≈24 L/min | Good for typical loader and implement tasks |
| Steering Pump Flow | Shared with implement circuit | No separate pump for steering |
| Total Combined Flow | ≈24 L/min | All functions draw from same source |
| Max System Pressure | ≈160 bar (2,300 psi) | Suitable pressure for compact tractor applications |
| Remote Valves | 1-2 rear, double-acting | Add-ons possible, mechanics and couplers for attachments |
Three-Point Hitch (3PH)
The AGCO ST35 has a standard three-point hitch designed for common farm implements and attachments. You can expect this hitch to handle typical tasks for a tractor in the 33 hp range.
| Feature | AGCO ST35 Details |
|---|---|
| Hitch Category | Category 1 |
| Lift Capacity @ Ball Ends | ~2,000 lbs (approximate) |
| Draft/Position Control | Position Control |
| Top-Link Sensing | No |
Hitch Category (1 / 1N / 2 / 3)
Your AGCO ST35 uses a Category 1 three-point hitch. Category 1 hitches are built for compact and small utility tractors.
This means the lower hitch pins on your implements should be 7/8 inch in diameter, and the spacing between them is about 26 inches. Most common implements—such as box blades, rear blades, small rotary cutters, and tillers—are designed for Category 1.
This makes it easy to find attachments that fit. If you switch between tractors, check the category label because larger tractors often use Category 2 or 3.
Category 1 hitches like the one on the ST35 provide good versatility for general landscaping, gardening, and property maintenance tasks.
Lift Capacity @ Ball Ends
The lift capacity of the AGCO ST35’s three-point hitch at the ball ends is rated around 2,000 pounds. This is a typical range for a tractor of this size and horsepower.
This lift rating means you can use the ST35 for various jobs, including lifting heavy three-point implements like rotary mowers, post hole diggers, and tillers. Actual lift capacity may decrease with the hitch raised higher or if you’re using extra-long implements.
To maximize performance, always check the weight of your attachments. If you use implements close to the maximum lift capacity, ensure your ballast is set up correctly to maintain tractor stability.
Draft / Position Control
The ST35 has a position control lever for the three-point hitch. Position control lets you set the exact height of the hitch and keep it there, which is useful for grading or tilling fields evenly.
With position control, you can return an implement to a preset height after lifting. Draft control, which senses soil resistance and automatically adjusts hitch height, is not standard on this model.
For ground-engaging implements like plows, position control gives you the basic adjustability needed for consistent results.
Top-Link Sensing (Yes/No)
The AGCO ST35 does not have top-link sensing. Top-link sensing is found mainly on larger, high-end tractors and enables draft sensing by measuring the force on the top link.
This feature helps with automatic hitch adjustments under varying ground conditions. While top-link sensing can be useful for heavy tillage work, you won’t typically need it for standard property maintenance or lighter field tasks.
The ST35’s setup is easy to use, and the lack of top-link sensing simplifies operation for less complex jobs.
Axles & Load Limits
Understanding the capacity and build of the axles on the AGCO ST35 is important for safe and effective operation. Each axle has its own weight limit, and the drive system plays a key role in putting power to the ground.
Maximum Front-Axle Load (Kg)
The AGCO ST35 is built for durability on the front end, but it is essential to know the maximum load it can safely handle. Real-world examples and technical data show the importance of balancing front-end weight, especially if you use front loaders or front-mounted attachments.
While the official documentation does not list a specific front axle weight limit in kilograms, the overall robust 4WD chassis and the machine’s utility class mean you should stay cautious when adding front weights or operating on slopes. Avoid overloading the front axle as this can lead to steering and suspension problems, as well as uneven tire wear.
A good approach is to keep front axle loads below the approximate 1,000–1,200 kg range, based on typical compact tractor engineering and the machine’s 68.5-inch wheelbase. If you need higher accuracy, check the user manual or contact your dealer for specific load figures.
Use caution to prevent damage, especially if working with heavy front implements.
Maximum Rear-Axle Load (Kg)
The rear axle of the AGCO ST35 is designed to carry more of the overall tractor weight. This is important for tasks like pulling implements or using rear-mounted equipment.
The maximum rear-axle load for compact tractors of this size generally falls between 1,600 kg and 1,800 kg. However, there is no explicit published number for the ST35’s rear axle.
To protect the rear axle, always factor in the combined weight of ballast, implements, and any cargo when calculating loads. Too much weight on the rear axle can cause stress, lead to component wear, and affect stability, especially on uneven terrain.
Monitor the rear axle during heavy pulling or transport work. Manufacturers often recommend not exceeding the tractor’s overall maximum permissible weight (about 2,800 kg for this model), splitting the load between the axles as the load type and tractor set-up require.
Final-Drive Type
The final drive on the AGCO ST35 transmits engine power to the wheels. This tractor uses a mechanical gear final drive system.
This design is known for its durability and lower maintenance compared to some other types. The 4WD setup increases traction, making it useful for off-road, farm, and utility work.
A gear final drive distributes stress across robust components and is less likely to suffer slippage under heavy loads. Proper maintenance of the final drive is necessary to ensure its long service life.
Regular checks of gear oil levels and inspection of seals will help prevent wear and breakdowns.
Axle & Load Limits Table
| Feature | Front Axle | Rear Axle | Final-Drive Type |
|---|---|---|---|
| Approximate Max Load (kg) | 1,000–1,200 | 1,600–1,800 | N/A |
| Typical Use | Loader attachments, | Implements, towing | Power transmission |
| front weights | cargo, ballast | to wheels | |
| Maintenance Needs | Check for overloading, | Check for overloading, | Inspect oil, seals, |
| tire wear | rear tire wear | and gears regularly | |
| Safety Tips | Avoid sharp turns/ | Avoid overload when | Keep gears lubricated, |
| slopes with heavy loads | towing or with heavy | watch for leaks | |
| implements |
Tires & Track Options
You can choose from several tire sizes and types on the AGCO ST35, each with a different tread and purpose. Ag, turf, and industrial tires serve separate uses, and you may need special kits for tracks or flotation.
Standard sizes and upgrade options make it easier to fit your tractor to your land and tasks.
| Tire/Track Option | Type | Common Sizes | Typical Use | Notes |
|---|---|---|---|---|
| Front Tire (Ag) | Agricultural | 7-16 | Field work, plowing | Good traction in soil |
| Front Tire (Turf) | Turf | 27×8.50-15 | Lawn, grass, turf | Does not damage grass |
| Front Tire (Industrial) | Industrial | Varies | Loader work, rough surfaces | Durable, handles heavy loads |
| Rear Tire (Ag) | Agricultural | 12.4-24, 13.6-24 | Field tasks | Deep tread for soil |
| Rear Tire (Turf) | Turf | 355/80D-20 | Lawns, sports fields | Wider, less ground pressure |
| Dual Rear Wheels (Optional) | Agricultural/Turf | Matches rear sizes | Heavy load traction | Not standard but can be added |
| Tracks / Flotation Kits | Specialty | N/A | Wet/soft ground support | Reduces soil compaction if equipped |
Standard Front Tire Size (Ag / Turf / Industrial)
The AGCO ST35 comes with several front tire options that match how and where you work. The standard agricultural (Ag) front tire is usually 7-16.
This size gives you strong traction for field work, helping the front end grip the soil, especially when pulling or using implements. If you mainly use your tractor on turf or grassy areas, a common turf tire size is 27×8.50-15.
Turf tires are wider and have a flatter tread, which spreads out the weight of your ST35 to avoid damaging lawns or sports fields. For loader work or operating on hard-packed lots, industrial front tires are also available.
These usually have a sturdy, block-style tread that resists wear and gives you more stability on gravel, pavement, or rougher ground. Tire size may vary by brand, but durability is always the focus.
Standard Rear Tire Size
The typical agriculture rear tire size for the AGCO ST35 is either 12.4-24 or 13.6-24. Both these sizes are built with deep angled treads to provide excellent grip and help with pulling heavy loads or implements in the field.
On grass and turf, you’ll often find the ST35 equipped with turf tires in size 355/80D-20. These back tires are much wider than ag tires and have a gentle tread pattern.
This design lowers ground pressure, making them useful for golf courses, parks, or lawns where protecting the surface is important. Standard rear tire sizes may also differ based on the job site and whether you select special configurations.
It’s important to choose the correct type and size for the main work you do, as rear tires play a key role in your tractor’s performance.
Optional Duals / Tracks / Flotation Kits
Optional dual rear wheels can be added to the ST35 for better stability and traction in soft or muddy fields. Duals involve fitting a second tire next to each standard rear tire.
This setup almost doubles the contact area with the ground, making it easier for you to handle heavy loads without getting stuck or compacting the soil too much.
For very wet or unstable ground, tracks or flotation kits may be needed. Tracks are less common but can be added using aftermarket kits.
They give your tractor even more surface area to spread its weight, preventing deep ruts and reducing soil damage.
Flotation tires, which are wider and larger than standard tires, can also be fitted if available. These are useful if your work often takes you into muddy pastures, soft fields, or sandy soils.
Ask your dealer about these kits and if they’re compatible with your model, since not all options come standard from the factory.
Dimensions & Weight
Understanding the physical dimensions and weight of the AGCO ST35 tractor is crucial when considering transport, storage, and compatibility with implements. The main areas to focus on include the wheelbase, overall length, width, cab or ROPS height, and clearances, as well as key weight figures.
| Feature | Value | Notes |
|---|---|---|
| Wheelbase | 68.5 inches (173 cm) | Stable and typical for this class |
| Overall Length | 121.5 inches (308.6 cm) | Allows for easier trailering |
| Overall Width (Min Tread) | 56.3 inches (143 cm) | Can be adjusted with axle settings |
| Height to ROPS / Cab | 70.3 inches (178.6 cm) | Lowered for transport below 6 ft |
| Ground Clearance | Approx. 13-16 inches | Suited for varied terrain |
| Shipping Weight | 3,168 lbs (1,437 kg) | Bare, no fluids or ballast |
| Operating Weight (With Fluids) | ~3,350 lbs (est.) | Includes fuel and essential fluids |
Wheelbase
The AGCO ST35 has a wheelbase of 68.5 inches (173 cm). The wheelbase is the distance between the front and rear wheels.
This figure affects stability, especially on inclines or when carrying front or rear-mounted implements. A longer wheelbase, as found on the ST35, improves straight-line stability and can help with traction.
This is a similar configuration to tractors from brands like Kubota or John Deere in the same horsepower range. Compared to smaller garden tractors, this gives you more confidence when using a loader or transporting heavy material.
The AGCO ST35’s 68.5-inch wheelbase is competitive with other compact utility models, such as the Branson and Iseki series, which typically range from 65 to 70 inches.
Shorter wheelbases tend to turn tighter but can be less stable when loads are applied. For its class, the ST35 hits a solid midpoint, giving you a comfortable ride and strong performance.
Overall Length
This tractor measures 121.5 inches (308.6 cm) from end to end. This measurement counts from the tip of the front to the rear, not including rear or front-mounted implements.
This length means the tractor can fit onto standard car trailers and into most midsize storage buildings. The length is important for working in tight spaces, maneuvering in sheds, or storing the machine with attachments.
The ST35’s size is a bit longer than some Allis Chalmers compact models but is in line with what you would expect from John Deere 3-series or Kubota L-series tractors. When you attach implements like a loader or backhoe, the overall length will increase, so plan for extra space at both ends.
Overall Width (Minimum Tread)
The minimum tread width of the AGCO ST35 is 56.3 inches (143 cm), measured at the narrowest rear wheel setting. This allows you to fit the tractor through standard barn doors or down planted rows without trouble.
The width can often be adjusted by reversing wheels or changing the axle position, which helps adapt to your terrain or crop row spacing. For comparison, Branson and Kubota compact tractors in the same horsepower range offer similar minimum treads, usually from 55 to 58 inches.
A narrower tread helps with maneuvering in vineyards or orchards, while a wider tread increases stability on slopes. Make sure to double-check your equipment and barn entrances to confirm that 56.3 inches is narrow enough for your needs.
Height to ROPS / Cab
With the foldable ROPS (Roll-Over Protective Structure) up, the AGCO ST35 stands 70.3 inches (178.6 cm) tall. The ROPS can be folded down for shipping or storage, keeping the overall height below most standard 6-foot garage doors.
This is especially helpful when working in barns with limited entry height or when transporting the tractor on a trailer. Competitors like John Deere and Kubota offer similar ROPS height in their compact utility models.
If you add a cab, check with your dealer because cab heights are usually a bit taller and could exceed 72 inches. Always keep ROPS up during operation for safety, but fold down for transport as needed.
Ground Clearance
The typical ground clearance for the AGCO ST35 is between 13 and 16 inches, although exact numbers may vary based on tire choice and settings. This clearance lets you work without worrying about the tractor bottoming out over uneven terrain or in fields with crop stubble.
Higher ground clearance, like you get on the ST35, is critical when working off-road or on undeveloped land. Iseki and Branson models in this power range offer similar clearances, allowing you to cross ditches and ruts without scraping the underside of the tractor.
The clearance is enough for small tillage work, brush mowing, and trail riding. It also helps prevent damage to the transmission and undercarriage when working over obstacles.
Shipping Weight
The AGCO ST35 has a shipping weight of 3,168 pounds (1,437 kg). This weight is with the tractor in its basic configuration and without fluids, weights, ballast, or additional attachments.
Knowing this weight is important for arranging safe shipping and handling with trailers or flatbeds. Compared to compact models from Kubota or Allis Chalmers, the weight is in the average range for 33-hp class machines.
The shipping weight affects how much you can legally haul on public roads and what kind of trailer you need for safe transport. Always consult your owner’s manual or local laws when transporting agricultural equipment.
Operating Weight (With Fluids)
When filled with standard fluids—diesel, coolant, and hydraulic oil—the operating weight of the AGCO ST35 increases slightly. With fluids and basic safety gear, expect a weight of about 3,350 pounds (estimated), still without heavy implements or ballast.
For daily work, you need to know this number when considering ground compaction, soil disturbance, and trailer payloads. It also affects how the tractor handles inclines or heavy loads.
Adding wheel weights, ballast, or a loader will increase the total mass, so keep these factors in mind when loading and towing or working on soft soils.
Fuel & Fluids
You need to know the exact fuel type, capacities, and maintenance requirements for your AGCO ST35 tractor to keep it running smoothly. Using the correct fluids in the right amounts helps prevent engine problems and prolongs the life of your tractor.
Fuel-Tank Capacity
The AGCO ST35 runs on diesel fuel, using an indirect injection system. The fuel tank holds about 8 to 9 gallons (30 to 34 liters) of diesel.
This gives you enough capacity for several hours of work before you need to refuel. You should always use clean, fresh diesel that matches the manufacturer’s recommendations.
Keeping the tank clean and free of water or debris reduces the chance of fuel system clogs or damage. Make it a habit to check the fuel gauge before each use to avoid running dry in the field.
It’s a good idea to fill up at the end of each day to reduce condensation and the risk of water buildup inside the tank, which can lead to fuel contamination or rust.
DEF-Tank Capacity (If Applicable)
The AGCO ST35 does not require Diesel Exhaust Fluid (DEF). This tractor model uses a tier of emissions system that does not include Selective Catalytic Reduction (SCR) technology, so there is no DEF tank at all.
Since there is no DEF system, you do not need to worry about storing or filling DEF, keeping DEF lines from freezing, or monitoring fluid levels. You can focus only on the main fluids like fuel, engine oil, and hydraulic oil.
If you see references to DEF for newer or different tractors, you can ignore them for the ST35.
Engine Oil Capacity
Your AGCO ST35 requires regular checks and changes of the engine oil for best performance. The engine oil capacity is about 4.2 quarts (4 liters) when changing both the oil and filter.
Use a high-quality 15W-40 diesel engine oil that meets API service standards recommended by the manufacturer. Always let the engine cool before checking or changing oil to avoid burns.
Check the oil level with the dipstick before starting the tractor, especially before heavy work. Low oil levels can cause engine damage, while too much oil is also bad for performance.
Follow the change interval in the operator’s manual—usually after the first 50 hours for new engines, then about every 100 hours, or once per year if used lightly.
Hydraulic/Transmission Oil Capacity
The AGCO ST35 combines hydraulic and transmission components that share oil. The capacity is about 6.6 gallons (25 liters) of universal tractor hydraulic/transmission fluid.
It’s important to use a high-quality, manufacturer-approved fluid. This oil lubricates gears, supports the hydraulic system, and helps cool the transmission.
Always check fluid levels regularly using the sight glass or dipstick—hydraulic leaks or low levels can make the steering or PTO stop working. Change the hydraulic/transmission oil and filter as recommended in your manual, usually every 300-400 hours.
Dirty oil can harm sensitive hydraulic parts and lower performance, so clean oil is important for reliable operation.
| Fluid Type | Capacity | Fluid Specification | Special Notes |
|---|---|---|---|
| Diesel Fuel | 8–9 gal | #2 diesel | Use clean fuel; keep tank full to reduce condensation |
| Diesel Exhaust Fluid (DEF) | N/A | N/A | Not required for AGCO ST35 |
| Engine Oil | 4.2 qts | 15W-40 Diesel Engine Oil (API) | Change after 50 hr break-in, then every 100 hr |
| Hydraulic/Transmission Fluid | 6.6 gal | Universal Tractor Fluid (UTTO) | Change every 300–400 hr; check level often |
Electrical System
The AGCO ST35 tractor’s electrical system is built to deliver reliable performance under a range of working conditions. This includes a grounded system, a dependable alternator, and a battery sized for engine starts in cold weather.
| Feature | Specification | Details / Notes |
|---|---|---|
| Ground Type | Negative | Chassis ground; common for utility tractors |
| Alternator Type | Alternator system | Included for charging and accessory power |
| Charging Output (Amps) | 40–50 amps (typical, confirm with manual) | Sufficient for lights, ignition, and accessories |
| Battery Voltage | 12 volts | Standard for most compact utility tractors |
| Battery CCA Rating | 500–600 CCA (typical, confirm with parts supplier) | Designed for reliable cold starts |
Ground Type (Negative / Positive)
The AGCO ST35 uses a negative ground system, which means the negative terminal of the battery is connected directly to the chassis. This type of ground is standard on most modern tractors.
It helps prevent electrical faults and makes troubleshooting electrical issues easier. You connect accessories or wiring with the negative side to the frame.
This setup also helps with compatibility when adding new electrical devices. Nearly all replacement electrical parts are built for negative ground systems, making repairs straightforward.
If you are working on your tractor’s wiring, always double-check the polarity to avoid accidental short circuits. Incorrect connections can damage sensitive electrical components.
Alternator / Charging System
The tractor is equipped with an alternator charging system instead of a generator. The alternator keeps the battery charged and supplies power to your lights, ignition, and any electrical accessories.
When the engine runs, the alternator produces current to support all these needs. Alternators are more efficient than the older generator systems found on vintage tractors.
They supply power at low RPMs and have built-in regulation to avoid overcharging. You will usually find the alternator mounted near the engine side, driven by a belt.
Regular maintenance, such as checking the belt tension and ensuring electrical connections are clean, helps the charging system work properly. A failing alternator may lead to weak battery starts and poor lighting performance.
Charging Output (Amps)
The alternator on the AGCO ST35 typically provides 40–50 amps of output. This range covers the needs of both the engine and extra electrical equipment, like work lights and small implements.
It’s important to use an alternator with the correct output to avoid overload and premature failure. If you add extra electrical accessories such as additional lights or a sprayer controller, make sure not to exceed this amp rating.
Overdrawing current can lead to wiring overheating or alternator damage. You can check the charging output with a simple multimeter if you notice dim lights or slow battery charging.
Refer to your manual for the exact figure.
Battery Voltage
The battery for your AGCO ST35 operates at 12 volts, which is standard for most compact utility tractors. This voltage supports the starter motor, control panel, ignition, and lights.
The 12-volt system is compatible with a wide range of aftermarket electrical accessories. A 12-volt battery is widely available and easy to replace if it fails.
When working with electrical components, always verify you are using 12-volt rated tools or accessories. Using a battery of the wrong voltage can damage your electrical system and leave your tractor unable to start.
Properly securing battery terminals and keeping them free of corrosion extends the life of your electrical system.
Battery CCA Rating
The recommended battery Cold Cranking Amps (CCA) rating for the AGCO ST35 is usually between 500 and 600 CCA. This rating gives the battery enough power to start the engine even in cold weather.
Choosing the right CCA ensures reliable starts when temperatures drop or if the engine oil is thick. A lower CCA battery may struggle during winter or after the tractor sits unused.
Always match or exceed the OEM CCA specification when replacing your battery. High CCA ratings can also help power additional electrical equipment for longer periods without causing voltage drops.
When checking or replacing the battery, confirm the rating printed on the battery label for best performance and safety.
Total Cost Of Ownership Metrics
Understanding the costs and service expectations for your AGCO ST35 tractor helps you budget for long-term ownership. Evaluating service intervals, maintenance expenses, depreciation rates, and fuel usage allows you to plan effectively and make informed decisions.
Recommended Service Intervals
Regular maintenance keeps your AGCO ST35 performing reliably and prevents costly repairs. For most users, you should change the engine oil and oil filter every 100 hours of operation or at least once per season.
Replace the air filter every 200 hours, though dusty conditions may require more frequent changes. Hydraulic fluid and filter changes should be done every 400 hours.
Inspect the transmission fluid and top up as necessary at each 100-hour interval. Grease all fittings every 10 hours, especially if you use front-end loaders or operate in wet environments.
Below is a summary schedule:
| Maintenance Task | Interval |
|---|---|
| Engine Oil & Filter Change | 100 hours |
| Air Filter Replacement | 200 hours |
| Hydraulic Fluid/Filter Change | 400 hours |
| Transmission Fluid Check/Top Up | 100 hours |
| Grease Fittings | 10 hours |
Estimated Annual Maintenance Cost
Normal annual maintenance costs for the AGCO ST35 typically range from $350 to $800, depending on part prices and local labor rates. If you handle simple tasks yourself, such as oil changes and filter replacements, you can keep costs on the lower side.
Parts like filters (oil, fuel, air) may cost about $75-$150 per year. Oil and hydraulic fluids often add another $100-$200.
Occasional professional inspections, including minor adjustments and labor, may run $200-$400. Unexpected repairs, such as hydraulic leaks or electrical fixes, may occur, especially with high usage.
Setting aside an extra $100-$200 annually for unexpected repairs is recommended.
| Cost Area | Estimated Yearly Cost |
|---|---|
| Filters (Oil, Air, Fuel) | $75–$150 |
| Fluids (Oil, Hydraulic) | $100–$200 |
| Professional Labor/Inspection | $200–$400 |
| Unexpected Repairs | $100–$200 |
| Total | $350–$800 |
Depreciation Curve (% Per Year)
Like most compact utility tractors, the AGCO ST35 sees higher depreciation during the first few years of ownership and stabilizes after about five years. In the first year, expect about 18–22% depreciation from the original purchase price.
Annual depreciation rates usually drop to about 8–10% during years two and three. After the third year, depreciation slows to 4–6% per year as long as the tractor is kept in good working condition.
Example Depreciation Table:
| Year of Ownership | % Value Lost (Approx) |
|---|---|
| 1 | 18–22% |
| 2 | 8–10% |
| 3 | 8–10% |
| 4+ | 4–6% per year |
Fuel Consumption @ Rated Load (L Hr⁻¹)
Your AGCO ST35, with its 33-horsepower diesel engine, typically uses between 3.5 and 4.5 liters of fuel per hour at rated load. Fuel usage is affected by the task, terrain, and condition of the tractor.
When mowing light grass or operating with little load, fuel consumption can stay near the lower end. Heavy loader work or frequent transport at higher speeds will move usage toward the higher end of the range.
| Load Condition | Fuel Usage (L/hr) |
|---|---|
| Light/Medium Duty | 3.5–3.8 |
| Heavy/Continuous Load | 4.0–4.5 |
| Average Use | ~4.0 |
Summary Table: Total Cost of Ownership Metrics for AGCO ST35
| Metric | Typical Figure/Range |
|---|---|
| Service Intervals | Oil: 100 hrs, Air Filter: 200 hrs |
| Annual Maintenance Cost | $350–$800 |
| Depreciation (First Year) | 18–22% |
| Depreciation (Per Year, Later) | 4–10% |
| Fuel Consumption (L/hr) | 3.5–4.5 |