Kubota KX040 Excavator : Prices, Specs, Buyers Guide

Kubota KX040

The Kubota KX040 is part of Kubota’s KX series, which is celebrated for its compact size, excellent maneuverability, and impressive power.

With its 42.4 horsepower engine, the KX040 defies its small stature by delivering exceptional digging and lifting capabilities. This compact powerhouse is designed to perform efficiently in confined job sites while offering the performance of larger excavators.

Key Features

  1. Powerful Engine: The heart of the Kubota KX040 is its 4-cylinder, turbocharged, 42.4 horsepower diesel engine. This engine is not only powerful but also fuel-efficient, allowing operators to get more work done while keeping operational costs in check.
  2. Spacious Cab: The operator’s comfort is a priority for Kubota, and the KX040’s spacious, air-conditioned cab provides a comfortable and ergonomic workspace. With intuitive controls and excellent visibility, operators can work long hours with reduced fatigue.
  3. Variable Width Undercarriage: The KX040 features a variable width undercarriage, which allows the tracks to be hydraulically adjusted from 4′ 1″ to 5′ 1″. This feature enhances stability during operation and makes it easier to navigate through narrow spaces.
  4. Impressive Digging Depth: Despite its compact size, the KX040 boasts an impressive digging depth of 11 feet 2 inches. This makes it suitable for a wide range of excavation tasks, from trenching to foundation work.
  5. Angle Blade Option: The optional angle blade on the KX040 adds versatility to the machine. It can be adjusted to various angles, making it useful for grading, backfilling, and other earthmoving tasks.
  6. Quick Coupler: The quick coupler system allows for fast and easy attachment changes, increasing efficiency on the job site. Operators can switch between buckets, breakers, and other attachments with minimal downtime

More Key Features

  • Superior strength: The KX040-4 has superior 4-ton muscle and clean engine performance, making it the ideal choice for the urban jungle
    It has the power and versatility to take on almost any task, even in the toughest conditions
  • Hydraulic 6-in-1 Blade: The Kubota hydraulic 6-in-1 Blade can be angled right and left, and now tilted as well. This blade enables six different positions: neutral, float-up, left-end-up, right-end-up, left-end-forward, and right-end-forward. This feature makes levelling and backfilling work incredibly easy, even on inclines and uneven terrain, making you more productive and more efficient.
  • Kubota Tier 4 emission engines: All Kubota excavators are powered by Kubota Tier 4 emission engines. The modern engine design maximizes digging and lifting performance, delivers minimized noise and vibration, and meets the latest engine emission regulation
  • Two-speed drive: All Kubota excavators have a two-speed drive that allows for efficient machine manoeuverability and backfill operations
  • Auto Idle: Save fuel with Kubota’s Auto Idle. When the control levers are in neutral for more than 4 seconds, the engine RPM automatically idles. Move any control lever, and the engine RPM immediately returns. This innovative feature reduces noise and exhaust emissions while reducing operating costs
  • Maintenance: Although your Kubota excavator is state-of-the-art, its maintenance doesn’t get much easier. Thanks to the full-opening rear and right side hoods, engine, control valves, and various components are easily accessible
  • Comfortable operator station: Designed and engineered to fit better and to keep you working longer comfortably, Kubota’s high-back suspension seat reduces strain and minimizes operator fatigue. It reclines to accommodate your individual posture and offers weight compensation, firm and adjustable wrist support, and retractable seat belts
  • ROPS/OPG (TOP Guard, Level I) canopy and cabin: The Kubota KX040-4 has a ROPS/OPG (TOP Guard, Level I) canopy and cabin, which provides protection to the operator in case of a rollover or falling debris
  • Cup holder: The Kubota KX040-4 also has a cup holder, which is a small but convenient feature for the operator
  • Auxiliary hydraulic circuits: The KX040 comes standard with one auxiliary hydraulic circuit, and an optional second circuit is available. This allows operators to use a wide range of attachments, such as hammers, breakers, augers, and grapples.

The Kubota KX040-4 is a versatile and powerful compact excavator that can handle a variety of tasks.

Its hydraulic 6-in-1 Blade, Kubota Tier 4 emission engines, two-speed drive, and Auto Idle feature make it an efficient and cost-effective machine to operate.

Additionally, its comfortable operator station and ROPS/OPG (TOP Guard, Level I) canopy and cabin provide a safe and comfortable working environment for the operator.

Kubota KX040 Specs


  • Engine Type: Kubota V2203-M-DI
  • Engine Power: 42.4 horsepower (31.6 kW) @ 2,400 RPM
  • Number of Cylinders: 4


  • Operating Weight: 9,259 lbs (4,195 kg)
  • Max Digging Depth: 11 feet 2 inches (3,400 mm)
  • Max Dumping Height: 12 feet 9 inches (3,890 mm)
  • Max Digging Radius: 18 feet 11 inches (5,770 mm)
  • Bucket Digging Force: 9,561 lbs (4,340 kgf)
  • Arm Digging Force: 4,112 lbs (1,867 kgf)
  • Travel Speed: Low: 1.3 mph (2.1 km/h), High: 2.2 mph (3.5 km/h)


  • Overall Length: 16 feet 7 inches (5,050 mm)
  • Overall Height: 8 feet 2 inches (2,490 mm)
  • Overall Width: 5 feet 5 inches (1,650 mm)
  • Track Width: Adjustable from 4 feet 1 inch (1,240 mm) to 5 feet 1 inch (1,550 mm)

Hydraulic System:

  • Hydraulic Pump Capacity: 24.4 GPM (92.4 L/min)
  • Auxiliary Hydraulic Flow: 18.8 GPM (71.2 L/min)

Fuel Tank Capacity:

  • 19.8 gallons (75 liters)

Other Features:

  • Cab: Enclosed ROPS (Roll Over Protective Structure) cab with air conditioning and heating options.
  • Track Type: Rubber or Steel Tracks (depending on configuration)
  • Blade: Optional angle blade for grading and backfilling.
  • Quick Coupler: Allows for easy attachment changes.
  • Counterweight: Standard counterweight for stability.

The Kubota KX040 is known for its compact size, impressive digging depth, and versatility in various construction and excavation applications.

It offers a comfortable operator environment with a spacious cab and ergonomic controls, making it a popular choice for professionals in the industry.

Additionally, its fuel-efficient engine and durable construction make it a reliable and cost-effective machine for a wide range of projects.

Kubota KX040-4 Parts and Parts Diagram

The Kubota KX040-4 is a compact excavator, and like most excavators, it consists of several main components that work together to perform digging and excavation tasks. Here are the main parts of a Kubota KX040-4 excavator:

  1. Chassis: The chassis is the base of the excavator, and it includes the tracks or wheels that allow the machine to move over various types of terrain.
  2. Engine: The engine provides the power needed to operate the excavator. Kubota KX040-4 models typically come equipped with a Kubota diesel engine known for its reliability and efficiency.
  3. Hydraulic System: The hydraulic system is a crucial component that controls the movement of the excavator’s arm, bucket, and other attachments. It consists of hydraulic pumps, hoses, and cylinders.
  4. Boom: The boom is the long, extendable arm of the excavator that connects to the chassis. It can be raised, lowered, and extended to reach different digging depths and positions.
  5. Arm: The arm, also called the dipper arm or stick, is the section of the excavator that attaches to the boom. It works in conjunction with the boom to control the depth and reach of the digging operation.
  6. Bucket: The bucket is the attachment at the end of the arm that is used for digging, scooping, and moving materials. Kubota KX040-4 excavators typically have quick coupler systems that allow for easy attachment changes.
  7. Cab: The cab is the operator’s compartment where the operator controls the machine. It typically includes a seat, controls, windows, and various instruments for monitoring the excavator’s performance.
  8. Control Panel: The control panel within the cab contains the operator’s controls, which include levers, joysticks, and pedals for operating the boom, arm, bucket, and tracks.
  9. Tracks: Kubota KX040-4 excavators typically come equipped with tracks, which provide stability and traction on various surfaces. Some models may have wheels instead of tracks.
  10. Counterweight: The counterweight is located at the rear of the excavator and helps balance the machine during digging and lifting operations.
  11. Auxiliary Hydraulics: Many excavators, including the KX040-4, have auxiliary hydraulic circuits that allow for the attachment of various hydraulic-powered tools and attachments, such as hammers, thumbs, and augers.
  12. Fuel Tank: The excavator has a fuel tank to store diesel fuel for the engine.
  13. Cooling System: A cooling system is in place to regulate the temperature of the engine and hydraulic components to prevent overheating.
  14. Exhaust System: The exhaust system includes the muffler and exhaust pipe to expel exhaust gases from the engine safely.
  15. Undercarriage: The undercarriage includes the tracks or wheels, rollers, idlers, and sprockets, which are essential for the excavator’s mobility and stability.

These are the main components of a Kubota KX040-4 excavator. Depending on the specific model and configuration, there may be additional features or attachments designed for various construction and excavation tasks.

To obtain a parts diagram for the Kubota KX040-4 excavator, please consider the following options:

  1. Kubota Dealer: Contact your local Kubota dealership or authorized Kubota parts distributor. They should be able to provide you with parts diagrams, as well as access to the parts and components you may need for your excavator.
  2. Kubota’s Official Website: Visit the official Kubota website and check if they have parts diagrams available for download or viewing in their support or parts section. Manufacturers often provide such resources for their equipment.
  3. Owner’s Manual: The owner’s manual for the Kubota KX040-4 excavator may contain diagrams and information about the various parts and components. Check your manual or contact Kubota if you need a replacement manual.
  4. Online Resources: There are websites and forums dedicated to heavy equipment and construction machinery where users may share parts diagrams and information. However, ensure that the information you find is accurate and reliable.
  5. Kubota Customer Support: Reach out to Kubota’s customer support for assistance. They may be able to provide you with the specific parts diagrams you need or direct you to the appropriate resources.

Kubota KX040-4 Problems

The Kubota KX040-4 is generally considered a reliable and well-built compact excavator.

However, like any piece of heavy equipment, it can experience issues or problems over time, especially if it is not properly maintained or if it operates in challenging conditions.

Some common problems or maintenance issues that may arise with the Kubota KX040-4 or any similar compact excavator include:

  1. Hydraulic Leaks: Hydraulic systems are critical for the operation of excavators, and hydraulic leaks can occur due to damaged hoses, fittings, or seals. Regular inspections and maintenance are essential to identify and address leaks promptly.
  2. Engine Troubles: This may include issues such as starting problems, loss of power, or overheating. Regular engine maintenance, including changing filters and fluids, is crucial for preventing engine-related problems.
  3. Undercarriage Wear: The undercarriage components, such as tracks, rollers, and idlers, can wear out over time and need replacement. Proper track tension and routine inspections can help extend the lifespan of these components.
  4. Electrical Problems: Issues with electrical systems, such as malfunctioning lights, sensors, or controls, can occur. These problems may require troubleshooting by a qualified technician.
  5. Lubrication and Greasing: Failure to lubricate moving parts and components regularly can lead to premature wear and tear. Proper greasing schedules should be followed to prevent issues.
  6. Attachment and Bucket Wear: Over time, excavator attachments and buckets may wear down, affecting their performance. Regular inspection and maintenance of these components are essential.
  7. Track Alignment: Misaligned or improperly tensioned tracks can cause uneven wear and reduced stability. Ensuring proper track alignment and tension is crucial.
  8. Fuel System Problems: Issues with the fuel system, such as clogged filters or contaminated fuel, can affect engine performance. Regular fuel system maintenance is important.
  9. Operator Error: Operator error can lead to machine stress and damage. Proper training and adherence to operational guidelines can minimize this risk.
  10. Environmental Conditions: Extreme weather conditions, harsh terrain, and heavy workloads can put additional stress on the machine and may lead to more frequent maintenance needs.
  11. Overheating: Overheating is another common problem with the Kubota KX040-4. It can be caused by a clogged radiator, a malfunctioning thermostat, or a damaged water pump.
  12. Starting issues: The Kubota KX040-4 may experience starting issues due to a faulty starter motor, a weak battery, or a damaged ignition switch
  13. Tracks wearing out: The tracks of the Kubota KX040-4 may wear out over time due to heavy use or improper maintenance. This can cause the machine to lose traction and stability.
  14. Boom and arm problems: Boom and arm problems can be caused by a number of factors, such as worn pins and bushings, bent or cracked metal, or hydraulic problems.
  15. Bucket problems: Bucket problems can be caused by a number of factors, such as worn teeth, a damaged bucket, or hydraulic problems.
  16. Track problems: Track problems can be caused by a number of factors, such as worn tracks, loose bolts, or hydraulic problems.
  17. Undercarriage problems: Undercarriage problems can be caused by a number of factors, such as worn sprockets, idlers, or rollers.
  18. Attachment problems: Attachment problems can be caused by a variety of factors, such as worn pins and bushings, bent or cracked metal, or hydraulic problems.
  19. Operator cab problems: Operator cab problems can be caused by a variety of factors, such as faulty air conditioning or heating, a damaged windshield, or a broken seat.

It’s important to note that many problems can be prevented or mitigated through regular maintenance and servicing by trained technicians. Kubota provides maintenance guidelines and recommendations in the operator’s manual for the KX040-4, and following these guidelines is essential for maximizing the machine’s reliability and lifespan.

Kubota KX040 Weight

The operating weight of the Kubota KX040 compact excavator is approximately 9,259 pounds, which is equivalent to approximately 4,195 kilograms.
This weight includes the base machine with the standard counterweight but does not include any additional attachments or optional equipment that may be added to the excavator.
Keep in mind that the weight may vary slightly depending on specific configurations and optional features chosen by the buyer.

Performance and Productivity

The Kubota KX040 is a powerful and productive excavator. It features a digging depth of up to 11 feet and a lifting capacity of up to 5,700 pounds. The KX040 is also equipped with a variety of features that improve performance and productivity, such as:

  • Load sensing hydraulic system: The KX040’s load sensing hydraulic system provides smooth and precise control, even under heavy loads.
  • Automatic swing stop: The KX040’s automatic swing stop system automatically stops the boom from swinging when the controls are released, improving safety and efficiency.
  • Auto idle: The KX040’s auto idle system reduces engine speed when the excavator is not in use, saving fuel and reducing emissions.

Kubota KX040-4 Price

The price of the Kubota KX040-4 varies depending on the year, model, and location. Here are some estimated prices based on the current research – Oct 2023:
  • 2013-2015: $38,500 USD to $42,900 USD
  • 2016-2018: $43,000 USD to $45,000 USD
  • 2019-2021: $48,995 USD to $57,900 USD
  • 2022: $59,900 USD
  • Rental cost: $350 per day, $175 for a half day, and $1,200 for a week

It’s important to note that these prices are estimates and may vary depending on the dealer, location, and other factors. It’s best to check with your local Kubota dealer for the most accurate pricing information.

Here are some tips for getting the best price on a Kubota KX040-4 excavator:

  • Shop around and get quotes from multiple dealers.
  • Consider buying a used excavator. Used excavators can be a great value, especially if they are in good condition and have low hours of use.
  • Negotiate with the dealer. Be prepared to negotiate on the price of the excavator, as well as the price of any attachments or accessories that you may need.
  • Look for financing options. Many dealers offer financing options for excavators, which can make it easier to afford a new or used machine.

Kubota Dealership Offers

some discounts and promotions available for the Kubota KX040-4. Here are some of the offers:

  • Save up to $5,000 or pay 0% A.P.R. for up to 36 Months with 0% Down on KX and U Series
  • $2300 Instant Rebate for Cash or Standard Rate Financing on KX040-4
  • Save up to $5,000 Instant Cash Rebate or 0% A.P.R. for 36 months with 0% down

It’s important to note that these offers may have expiration dates and may vary depending on the dealer and location. It’s best to check with your local participating Kubota dealer for the most up-to-date information on discounts and promotions for the Kubota KX040-4.

Kubota KX040-4 Tracks

The Kubota KX040-4 is a compact excavator designed for various construction and excavation tasks. It typically comes equipped with rubber tracks, which are commonly used on compact excavators for their versatility and low ground impact.

Rubber tracks are more expensive than steel tracks, but they offer a number of advantages, including:

  • Reduced ground pressure: Rubber tracks have a larger footprint than steel tracks, which reduces the ground pressure exerted by the excavator. This is important when working on soft or delicate surfaces, such as turf or concrete.
  • Smoother ride: Rubber tracks provide a smoother ride than steel tracks, which can help to reduce operator fatigue.
  • Less noise: Rubber tracks are quieter than steel tracks, which is important when working in noise-sensitive areas.
  • Less vibration: Rubber tracks produce less vibration than steel tracks, which can help to protect the excavator’s components and extend its lifespan.
  • The Kubota KX040-4 excavator uses the following rubber track size:

    • Track width: 350 mm (13.8 in)
    • Track pitch: 54.5 mm (2.15 in)
    • Number of links: 86

    It is important to note that these are just the standard track size for the Kubota KX040-4 excavator. There are a number of aftermarket track sizes available, so it is important to consult your operator’s manual or contact a qualified dealer to determine the correct track size for your excavator.

    Here are some tips for maintaining your Kubota KX040-4 excavator’s rubber tracks:

    • Inspect the tracks regularly for signs of wear and damage.
    • Keep the tracks clean and free of debris.
    • Avoid using the excavator on hard or abrasive surfaces.
    • Check the track tension regularly and adjust it as needed.
    • Replace the tracks when they are worn or damaged.

Kubota KX040-4 Track Details

  1. Track Type: The Kubota KX040-4 comes with rubber tracks, which provide excellent traction and stability while minimizing damage to surfaces like pavement or sensitive terrain.
  2. Track Width: The track width can vary depending on the specific model and configuration of the KX040-4. The width of the tracks affects the machine’s stability and weight distribution.
  3. Undercarriage: The undercarriage of the KX040-4 includes the tracks, sprockets, idlers, and rollers. The undercarriage components work together to support and propel the excavator.
  4. Rubber Track Pads: Some operators may choose to add rubber track pads or shoes to the excavator’s tracks. These pads can help protect paved surfaces, reduce noise, and increase stability in some conditions.
  5. Maintenance: Regular maintenance of the tracks is essential to ensure optimal performance and longevity. This includes checking for signs of wear, tensioning the tracks properly, and cleaning debris from the undercarriage.
  6. Terrain: The rubber tracks are suitable for a variety of terrains, including soft soils, gravel, and pavement. However, operators should be cautious when operating on sharp or abrasive materials that may cause accelerated track wear.
  7. Tread Pattern: The tread pattern on the rubber tracks is designed to provide traction while minimizing damage to surfaces. The specific pattern may vary depending on the manufacturer and model.
  8. Track Replacement: Over time, tracks can wear out and may need to be replaced. Kubota or authorized dealers can provide replacement tracks designed specifically for the KX040-4 excavator.
  9. Track installation: Installing the tracks on the Kubota KX040-4 can be a challenging task, especially if you’re doing it alone. It’s important to follow the manufacturer’s instructions carefully and use the proper tools and equipment to ensure a safe and successful installation.
  10. Track tension: The tension of the tracks is important for optimal performance and longevity. It’s important to check the tension regularly and adjust it as needed to ensure proper track alignment and prevent premature wear.

Kubota KX040 Track Lifespan

The lifespan of the tracks on a Kubota KX040-4 excavator can vary significantly based on several factors, including the type of work they are used for, the operating conditions, the quality of maintenance, and the operator’s practices. Here are some general factors that can affect the longevity of the tracks:

  1. Type of Work: The type of work the excavator is used for plays a significant role. Operating on abrasive surfaces, rocky terrain, or materials that can cause excessive wear and tear can shorten the lifespan of the tracks.
  2. Operating Conditions: Harsh operating conditions, such as working in extreme temperatures, wet or muddy environments, or areas with high levels of debris, can affect track life. Tracks may wear out more quickly in such conditions.
  3. Maintenance: Regular and proper maintenance of the tracks is essential for maximizing their lifespan. This includes cleaning debris from the undercarriage, ensuring proper tension, and regularly inspecting for signs of wear or damage.
  4. Operator Practices: The operator’s skill and operating practices can impact track life. Careful and skillful operation, such as avoiding sharp turns or sudden movements, can help extend track longevity.
  5. Track Quality: The quality of the tracks themselves can vary based on factors like the manufacturer and materials used. High-quality tracks are often more durable and longer-lasting.
  6. Track Design: Some excavators come with different track designs that may affect durability. For example, reinforced or heavy-duty tracks may last longer in demanding conditions.
  7. Track Replacement: When tracks become excessively worn or damaged, they will need to be replaced. The frequency of track replacement will depend on how well the excavator is maintained and the factors mentioned above.

Kubota KX040 Track Replacement Cost

The cost of replacing the tracks on the Kubota KX040-4 varies depending on the dealer, location, and quality of the tracks. Here are some estimated prices based on current research – Oct 2023:

  • Fortis HD: $1,336.98 for OEM certified tracks
  • National 1 Tracks and Parts: $1,400.02 for OEM quality tracks with a 2-year warranty
  • OnTrac Parts: $1,135.00 for replacement tracks with a 12-month or 1,000-hour pro-rated warranty
  • Black Dog Tracks: $1,610.68 for replacement rubber tracks with free shipping and tax included
  • Monster Tires: Price not specified
  • Texas Rubber Tracks: $Not specified

It’s important to note that these prices are estimates and may vary depending on the dealer, location, and other factors. It’s best to check with your local Kubota dealer or track supplier for the most accurate pricing information.

Additionally, the cost of labor for installation should also be considered when replacing the tracks.

Proper maintenance and care of the tracks are essential to ensure the longevity and performance of your Kubota KX040-4 excavator.

Regular inspections, track tension adjustments, and cleaning can help extend the life of the tracks and ensure safe and efficient operation on various job sites.

Always refer to the operator’s manual for specific maintenance guidelines and recommendations provided by Kubota.

Kubota KX040 Lifting Capacity

The Kubota KX040-4 has a maximum lifting capacity of 4,080 pounds at a 2-foot load point height and 8-foot load radius. This means that the excavator can lift up to 4,080 pounds when the load is attached to the bucket at a point that is 2 feet above the ground and the excavator’s boom is extended 8 feet.

The lifting capacity of the KX040-4 will decrease as the load point height and load radius increase. For example, the lifting capacity at a 4-foot load point height and 8-foot load radius is 3,600 pounds.

It is important to note that the lifting capacity of the KX040-4 is also affected by the stability of the excavator. If the excavator is not properly stabilized, the lifting capacity will be reduced.

Here are some tips for safely lifting loads with the Kubota KX040-4:

  • Always make sure that the excavator is properly stabilized before lifting a load.
  • Keep the load close to the excavator. The further the load is from the excavator, the greater the risk of tipping over.
  • Avoid lifting loads that are too heavy for the excavator’s lifting capacity.
  • Be careful when lifting loads over obstacles.
  • Be aware of your surroundings and avoid hitting anything with the load.

If you are unsure about the lifting capacity of the KX040-4 or how to safely lift a load, please consult your operator’s manual or contact a qualified dealer.

Kubota KIX040 Attachments

The Kubota KX040 is compatible with a wide range of attachments, including:

  • Buckets: A variety of bucket sizes and types are available to meet the needs of any job.
  • Hammers: Hammers are used to break up concrete and asphalt.
  • Breakers: Breakers are used to break up hard materials such as rock and concrete.
  • Augers: Augers are used to drill holes for fence posts, foundations, and other applications.
  • Grapples: Grapples are used to grab and move materials such as logs, brush, and debris.
  • Other attachments: A variety of other attachments are available for the KX040, such as thumbs, rippers, and mulchers.

More Details below

  1. Buckets:
    • Digging Buckets: These are standard buckets used for digging and excavation tasks.
    • Grading Buckets: Grading buckets have a wider profile and are used for leveling and grading work.
    • Trenching Buckets: Trenching buckets are designed for digging narrow trenches, typically used in utility installations.
  2. Hydraulic Thumb: A hydraulic thumb attachment allows for better gripping and handling of materials, especially when loading or sorting objects.
  3. Auger Attachment: An auger attachment is used for drilling holes, such as for fence posts or tree planting. It comes in various sizes and styles to suit different drilling needs.
  4. Hydraulic Breaker: A hydraulic breaker attachment is used for breaking concrete or rock surfaces. It’s often used in demolition and construction projects.
  5. Grapple Attachment: Grapple attachments are used for handling materials like logs, rocks, and debris. They come in various designs, including root grapples and demolition grapples.
  6. Hydraulic Plate Compactor: A plate compactor attachment is used for compacting soil or loose materials. It’s commonly used in road construction and landscaping projects.
  7. Ripper Attachment: Ripper attachments are used for breaking up hard soil or rocky terrain. They have multiple tines or shanks for penetration.
  8. Quick Coupler System: A quick coupler system allows for fast and easy attachment changes without the need for manual pin removal. It improves efficiency on the job site.
  9. Angle Blade Attachment: An angle blade attachment can be used for grading, leveling, and backfilling tasks. It can be angled to the left or right for precise control.
  10. Hydraulic Thumb: A hydraulic thumb attachment enhances the excavator’s ability to grasp and manipulate objects, making it useful for tasks like material handling and sorting.
  11. Rake Attachment: Rake attachments are used for clearing debris, rocks, and vegetation. They are commonly used in landscaping and land clearing.
  12. Vibration Compactor Plate: This attachment is used for compacting soil and other materials, especially in utility trench applications.
  13. Rippers and Scarifiers: These attachments are used for breaking up compacted soil, asphalt, or concrete surfaces. They are often used in road construction and rehabilitation.

Kubota KX040 Bucket

The Kubota KX040 excavator typically comes with a standard digging bucket as part of its standard equipment package. However, Kubota and various aftermarket manufacturers offer a range of bucket attachments for the KX040 to suit different digging and excavation needs. Here are some common types of buckets available for the Kubota KX040:

  1. Digging Bucket: This is the standard bucket that comes with the excavator. It’s used for general digging and excavation tasks. It’s available in various sizes, typically ranging from 12 inches to 36 inches or more, depending on the job requirements.
  2. Grading Bucket: Grading buckets are wider and flatter than digging buckets, making them suitable for grading, leveling, and backfilling work. They help achieve a smooth surface finish.
  3. Trenching Bucket: Trenching buckets have a narrow width and are designed for digging narrow trenches. They are commonly used in utility and pipeline installations.
  4. Ditching Bucket: Ditching buckets have a similar design to grading buckets but may have additional features like a grading hook for more precise trenching and ditching work.
  5. Rock Bucket: Rock buckets are reinforced and have specialized teeth or cutting edges to handle rocky and abrasive materials. They are used in excavation tasks involving rocks and hard soils.
  6. Cleanup Bucket: Cleanup buckets have a larger capacity and are used for loading and moving loose materials like sand, gravel, or debris.
  7. Sieve Bucket: Sieve buckets, also known as skeleton buckets, have gaps or openings between the bucket teeth. They are used for sifting and sorting materials like rocks or debris.
  8. V-Bucket: V-buckets are used for digging V-shaped trenches, which are commonly used in drainage and irrigation projects.
  9. Thumb Bucket: Some buckets come with a built-in thumb attachment, which can be used for grasping and handling objects like logs or rocks.
  10. Hydraulic Tilt Bucket: A hydraulic tilt bucket can be tilted to various angles, making it easier to dig trenches or shape slopes precisely.
  11. Heavy-Duty Bucket: Heavy-duty buckets are designed for more demanding applications and are reinforced for increased durability.

Kubota KX040 Grading Bucket

A Kubota KX040 grading bucket is a specific type of excavator bucket designed for grading, leveling, and backfilling tasks. Grading buckets typically have a wider and flatter profile compared to standard digging buckets. Here are some key features and information about a Kubota KX040 grading bucket:

  1. Design: A grading bucket is designed to provide a smooth and level finish when working on surfaces like soil, gravel, or sand. It has a flat bottom and a wider profile compared to digging buckets, which helps in spreading and leveling materials effectively.
  2. Applications: Grading buckets are commonly used in landscaping, road construction, and other applications where precision grading and leveling are required. They are also useful for backfilling trenches and creating a consistent grade.
  3. Size: Kubota offers grading buckets for the KX040 excavator in various sizes, typically ranging from 24 inches to 48 inches in width, although specific sizes may vary. The size you choose depends on the width and depth of the area you need to grade.
  4. Cutting Edge: Grading buckets usually have a straight cutting edge that spans the width of the bucket. This edge helps in cutting into materials and achieving a level surface.
  5. Attachment: The grading bucket can be easily attached to the excavator’s arm using the quick coupler system or other attachment methods, depending on the specific model and configuration of your KX040 excavator.
  6. Durability: Grading buckets are typically built to withstand the rigors of grading and leveling work. They are constructed from heavy-duty materials to ensure durability and longevity.
  7. Operator Control: The operator controls the excavator’s arm and bucket to achieve precise grading results. Kubota KX040 excavators are known for their smooth and responsive hydraulic controls, which are important for achieving accurate grades.

When using a grading bucket on your Kubota KX040 excavator, it’s essential to have good control over the machine to ensure that you achieve the desired grade and finish. Proper training and practice with the equipment are important to achieve the best results.

When selecting a bucket for your Kubota KX040 excavator, consider the specific tasks you’ll be performing and the material you’ll be working with.

The bucket size and type should match your excavation needs to optimize productivity and efficiency on the job site. Additionally, ensure that any bucket attachment is compatible with your KX040 and properly installed for safe operation. Kubota or an authorized dealer can provide guidance on bucket selection and installation.

Kubota KX040-4 Thumb Kit

A Kubota KX040-4 thumb kit is a hydraulic attachment that can be added to the excavator’s arm. It consists of two tines that are mounted on a rotating cylinder. The thumb kit is controlled by two hydraulic hoses that are connected to the excavator’s hydraulic system.

The thumb kit is a versatile attachment that can be used for a variety of tasks, including:

  • Grabbing and moving objects, such as logs, rocks, and debris.
  • Breaking up concrete and asphalt.
  • Backfilling trenches.
  • Digging holes for fence posts and foundations.
  • Grading and leveling land.

The thumb kit can make the Kubota KX040-4 excavator more efficient and productive for a variety of tasks. It is an essential attachment for many excavator operators.

There are a number of different thumb kits available for the Kubota KX040-4 excavator. The best thumb kit for your needs will depend on the specific tasks that you plan to use it for. When choosing a thumb kit, it is important to consider the following factors:

  • Size and capacity: Thumb kits come in a variety of sizes and capacities. It is important to choose a thumb kit that is the right size and capacity for your excavator and the tasks that you plan to use it for.
  • Type: There are two main types of thumb kits: hydraulic thumb kits and mechanical thumb kits. Hydraulic thumb kits are more powerful and versatile than mechanical thumb kits, but they are also more expensive.
  • Brand: There are a number of different brands of thumb kits available. It is important to choose a thumb kit from a reputable brand.

If you are unsure which thumb kit is right for your needs, please consult your operator’s manual or contact a qualified dealer.

Here are some of the benefits of using a thumb kit on your Kubota KX040-4 excavator:

  • Increased productivity: A thumb kit can help you to work more efficiently and productively by allowing you to perform a wider range of tasks with your excavator.
  • Reduced operator fatigue: A thumb kit can help to reduce operator fatigue by eliminating the need to manually lift and move objects.
  • Improved safety: A thumb kit can help to improve safety by reducing the risk of accidents caused by manually lifting and moving objects.
  • Increased versatility: A thumb kit can make your excavator more versatile by allowing you to perform a wider range of tasks.

Key points regarding the Kubota KX040-4 thumb kit:

  1. Hydraulic or Mechanical: Thumb kits for the KX040-4 may come in hydraulic and mechanical variants. Hydraulic thumbs are typically more versatile and provide precise control over the thumb’s movement, while mechanical thumbs are operated manually. The hydraulic thumb cylinder is an essential component of the Kubota KX040-4 thumb kit. Replacement hydraulic thumb cylinders for Kubota KX040-4 equipment feature a 2.5-in. bore, 1.5-in. rod, and 18-in. stroke
  2. Installation: The thumb kit can be installed by a Kubota dealer or a qualified technician. Proper installation is crucial to ensure safe and efficient operation.
  3. Compatibility: Ensure that the thumb kit you choose is compatible with the KX040-4 model. Kubota or an authorized dealer can provide guidance on selecting the appropriate thumb kit. The Kubota KX040-4 thumb kit is compatible with Kubota KX71, KX91, KX121, KX033, KX040, and U35 mini-excavators using the Kubota factory quick attach system
  4. Operation: The thumb attachment is controlled from the operator’s station, allowing you to open and close the thumb to grip objects. Hydraulic thumbs offer finer control, allowing for more delicate handling of materials.
  5. Applications: A thumb kit enhances the versatility of the excavator, making it suitable for tasks such as loading/unloading, sorting materials, and handling irregularly shaped objects like logs or rocks.
  6. Safety: Always follow safety guidelines and best practices when using the thumb attachment. Be aware of the machine’s capacity and limitations when handling heavy or bulky materials.
  7. Components: The Kubota KX040-4 thumb kit typically includes a thumb assembly, main pin, two cylinder pins, two hydraulic hoses, four hydraulic fittings, and Teflon tape.
  8. Cost: The cost of the Kubota KX040-4 thumb kit varies depending on the dealer and location. The price ranges from $1,595 to $2,500, depending on the kit and the dealer.
  9. Maintenance: Proper maintenance of the Kubota KX040-4 thumb kit is essential for optimal performance and longevity. This includes regular cleaning, inspection, and lubrication of the components, as well as checking for damage or wear.

Benefits of the Kubota KX040

  1. Manoeuvrability: The compact design of the KX040 allows it to navigate through tight spaces with ease. Whether you’re working in urban construction sites or residential areas with limited access, this excavator can get the job done.
  2. Versatility: The KX040’s ability to accommodate various attachments makes it a versatile tool for construction professionals. It can tackle a wide range of tasks, from excavation and trenching to demolition and grading.
  3. Fuel Efficiency: Kubota has incorporated advanced technology into the KX040’s engine to ensure optimal fuel efficiency. This not only reduces operating costs but also helps reduce the environmental footprint of the machine.
  4. Comfortable Operator Environment: The spacious cab, ergonomic controls, and excellent visibility contribute to operator comfort and safety. Reduced operator fatigue translates to more productive hours on the job.
  5. Durability: Kubota is known for building rugged and reliable machinery, and the KX040 is no exception. With proper maintenance, this excavator can provide years of dependable service.
  6. Resale Value: Kubota equipment is highly regarded in the used equipment market. Investing in a KX040 can yield a good resale value down the road, making it a sound long-term investment for contractors.

Kubota KX040 Applications

The Kubota KX040’s versatility makes it suitable for a wide range of applications, including:

  1. Residential Construction: From digging foundations to landscaping, the KX040 is the perfect choice for residential construction projects.
  2. Utility Work: It excels in utility work, including digging trenches for water, gas, and electrical lines.
  3. Landscaping: With the right attachment, the KX040 can handle tasks like grading, tree removal, and even stump grinding.
  4. Demolition: The power and precision of the KX040 make it an excellent choice for controlled demolition work.
  5. Agriculture: Farmers and ranchers can benefit from the KX040’s capabilities for tasks such as digging irrigation ditches and clearing land.
  6. Other applications: The KX040 can also be used for a variety of other applications, such as utility construction, pipeline installation, and disaster relief.


The Kubota KX040 compact excavator is a remarkable piece of machinery that combines power, versatility, and manoeuvrability in a compact package.

Whether you’re a contractor working in tight urban spaces or a farmer in need of reliable equipment for various tasks, the KX040 has you covered.

With its impressive features, operator comfort, and durability, it’s no wonder that the Kubota KX040 has become a trusted choice for professionals in the construction and excavation industry.

When you invest in a KX040, you’re not just buying a machine; you’re investing in efficiency, reliability, and the future of your projects.