Kubota L3901 Parts and Parts Manual PDF

Kubota L3901 Parts

Kubota has long been synonymous with reliability and efficiency in the agricultural and construction equipment industry. The Kubota L3901 is no exception, offering robust performance in a compact package.

In this post, we will delve into the intricate details of Kubota L3901 parts, providing valuable insights into the components that make this machine a powerhouse in its class.

Kubota L3901 Parts Diagram:

To comprehend the inner workings of the Kubota L3901, a parts diagram serves as an invaluable tool. This visual representation outlines the placement and interconnection of every part, aiding in the identification of components during maintenance or repairs.

A Kubota L3901 Parts Diagram is a visual representation of the various components that make up this tractor model. Keep in mind that an actual diagram would be more graphical and illustrative. Here is a textual representation to give you an idea of what sections might be included in such a diagram:

  1. Engine Compartment:
    • Engine: Illustration of the engine block, cylinders, and components.
    • Radiator: Representation of the cooling system components.
    • Air Cleaner: Diagram of the air intake system.
  2. Fuel System:
    • Fuel Tank: Illustration of the fuel tank and its connections.
    • Fuel Pump: Representation of the fuel pump and related parts.
    • Fuel Injectors: Diagram of the injectors and their positioning.
  3. Hydraulic System:
    • Hydraulic Pump: Illustration of the pump and its connections.
    • Hydraulic Cylinders: Diagram of the cylinders and hoses.
    • Control Valves: Representation of valves and their positions.
  4. Transmission and Clutch:
    • Clutch Assembly: Diagram of the clutch components.
    • Transmission: Illustration of the transmission system.
  5. Brake System:
    • Brake Pedals: Representation of brake pedal assembly.
    • Brake Lines: Diagram of brake lines and connections.
  6. Steering System:
    • Steering Gear: Illustration of the steering gear mechanism.
    • Tie Rods: Diagram of tie rods and their connections.
  7. Electrical System:
    • Battery: Representation of the battery and its connections.
    • Alternator: Diagram of the alternator and wiring.
    • Starter: Illustration of the starter motor and solenoid.
  8. Axles and Differential:
    • Front and Rear Axles: Diagram of axles and related components.
    • Differential Gears: Representation of the differential gears.
  9. Exhaust System:
    • Exhaust Manifold: Illustration of the manifold and exhaust pipes.
    • Muffler: Diagram of the muffler and its connections.
  10. Attachments and Accessories:
    • PTO (Power Take-Off): Representation of the PTO system.
    • Three-Point Hitch: Diagram of the hitch and linkage.
  11. Wheels and Tires:
    • Tires: Illustration of the tires and their specifications.
    • Wheels: Diagram of the wheel assembly.
  12. Safety Features:
    • Roll Over Protection System (ROPS): Representation of the ROPS structure.
    • Safety Labels: Diagram of safety labels and their locations.

Kubota L3901 Parts Catalog:

The parts catalog is an extensive resource that goes beyond a simple diagram. It provides a comprehensive listing of all available Kubota L3901 parts, complete with part numbers and descriptions. This catalog proves indispensable when ordering replacement parts, ensuring precision and compatibility.

Kubota L3901 Parts Manual PDF:

In the digital age, having information at your fingertips is essential. The Kubota L3901 parts manual in PDF format offers convenience and accessibility. Users can easily search for specific parts, making repairs and maintenance tasks more efficient.

  1. Introduction:
    • Brief overview of the Kubota L3901 model.
    • Explanation of the manual’s purpose and how to use it effectively.
    • Safety guidelines for handling and working on the equipment.
  2. Table of Contents:
    • A detailed list of all sections and subsections for quick reference.
  3. General Information:
    • Basic information about the Kubota L3901, including model specifications.
    • Lubrication points and guidelines.
  4. Engine Components:
    • Breakdown of all engine-related parts.
    • Cylinder head, pistons, crankshaft, and other internal components.
  5. Cooling System:
    • Radiator, water pump, thermostat, and related parts.
    • Guidelines for maintaining proper engine temperature.
  6. Fuel System:
    • Fuel tank, fuel pump, injectors, and related components.
    • Kubota L3901 fuel filter specifications and replacement instructions.
  7. Air Intake System:
    • Air cleaner, intake manifold, and associated parts.
    • Importance of clean air for efficient engine performance.
  8. Exhaust System:
    • Exhaust manifold, muffler, and other exhaust components.
    • Compliance with emission standards.
  9. Clutch and Transmission:
    • Clutch assembly and related components.
    • Transmission parts and their functions.
  10. Hydraulic System:
    • Hydraulic pump, cylinders, hoses, and connectors.
    • Instructions for bleeding the hydraulic system.
  11. Axles and Differential:
    • Front and rear axles, differential gears, and related parts.
    • Lubrication requirements for smooth operation.
  12. Brake System:
    • Brake pedals, brake lines, and brake components.
    • Instructions for adjusting and replacing brakes.
  13. Steering System:
    • Steering gear, tie rods, and other steering components.
    • Guidelines for steering system maintenance.
  14. Electrical System:
    • Battery, alternator, starter, and wiring diagram.
    • Troubleshooting common electrical issues.
  15. Wheels and Tires:
    • Specifications for tires and wheels.
    • Guidelines for tire maintenance and replacement.
  16. Attachments and Accessories:
    • Information on optional attachments and accessories.
    • Instructions for installation and usage.
  17. Maintenance Schedule:
    • A recommended maintenance schedule for various components.
    • Lubrication points and intervals.
  18. Troubleshooting Guide:
    • Common issues and their possible causes.
    • Step-by-step instructions for diagnosing and solving problems.
  19. Parts Catalog:
    • A comprehensive list of all Kubota L3901 parts, organized by category.
    • Part numbers, descriptions, and illustrations for easy identification.
  20. Index:
    • An alphabetical index for quick navigation to specific topics.

Kubota L3901 Parts List:

A detailed parts list is crucial for operators and technicians alike. This comprehensive inventory of Kubota L3901 parts helps in planning for regular maintenance, troubleshooting issues, and ensuring the longevity of the equipment.

  1. Engine Parts:
    • Piston Assembly
    • Cylinder Head
    • Crankshaft
    • Camshaft
    • Timing Gear
    • Oil Pump
  2. Cooling System Parts:
    • Radiator
    • Water Pump
    • Thermostat
    • Radiator Hoses
    • Fan Belt
  3. Fuel System Parts:
    • Fuel Tank
    • Fuel Pump
    • Fuel Injectors
    • Injection Pump
    • Fuel Filter
  4. Air Intake System Parts:
    • Air Cleaner Assembly
    • Intake Manifold
    • Air Filter
  5. Exhaust System Parts:
    • Exhaust Manifold
    • Muffler
    • Exhaust Pipes
  6. Transmission and Clutch Parts:
    • Clutch Assembly
    • Transmission Gears
    • Shift Forks
    • Transmission Housing
  7. Hydraulic System Parts:
    • Hydraulic Pump
    • Hydraulic Cylinders
    • Control Valves
    • Hydraulic Hoses
  8. Brake System Parts:
    • Brake Pedals
    • Brake Lines
    • Brake Shoes
    • Brake Drums
  9. Steering System Parts:
    • Steering Gear
    • Tie Rods
    • Steering Wheel
  10. Electrical System Parts:
    • Battery
    • Alternator
    • Starter Motor
    • Wiring Harness
  11. Axles and Differential Parts:
    • Front Axle Assembly
    • Rear Axle Assembly
    • Differential Gears
  12. Attachments and Accessories Parts:
    • PTO (Power Take-Off) Assembly
    • Three-Point Hitch Components
    • Claw Grapple Attachment
  13. Wheels and Tires Parts:
    • Front and Rear Tires
    • Wheels
    • Lug Nuts
  14. Safety Features Parts:
    • ROPS (Roll Over Protection System)
    • Safety Labels and Decals
  15. Miscellaneous Parts:
    • Nuts, Bolts, and Fasteners
    • O-Rings and Seals
    • Bushings and Bearings
    • Gaskets and Seals

Kubota L3901 Specs:

Understanding the specifications of the Kubota L3901 is key to maximizing its performance. From engine power to hydraulic capacity and lifting capabilities, the specs provide a holistic view of the machine’s capabilities.

Here is a detailed breakdown of the specifications for the Kubota L3901:

  1. Engine:
    • Model: Kubota D1803-CR-E4
    • Type: 4-cylinder, in-line, vertical, water-cooled, diesel
    • Displacement: 111.4 cubic inches (1.8 L)
    • Gross Horsepower: 37.5 hp (28 kW) @ 2,400 rpm
    • PTO Horsepower: 31.4 hp (23.4 kW)
  2. Transmission:
    • Type: Synchronized Shuttle
    • Number of Speeds: 8 forward, 8 reverse
    • Clutch: Dry, Single Plate
  3. Hydraulics:
    • Pump Capacity: 5.8 gpm (22.0 L/min)
    • 3-Point Hitch: Category I
    • Lift Capacity at 24″ Behind Lift Point: 1,635 lbs (742 kg)
  4. PTO (Power Take-Off):
    • Rear PTO Speed: 540 rpm
    • Mid PTO Speed: 2,000 rpm (Optional)
    • PTO Actuation: Mechanical
  5. Brakes:
    • Wet Disc Brakes
    • Parking Brake: Mechanical
  6. Steering:
    • Hydrostatic Power Steering
  7. Tires:
    • Front Tires: 8-16 (2WD), 10-16.5 (4WD)
    • Rear Tires: 14.9-24 (2WD), 14.9-26 (4WD)
  8. Dimensions:
    • Overall Length (with 3P): 126.4 inches (3,211 mm)
    • Overall Width (Min. Tread): 62.4 inches (1,585 mm)
    • Height to Top of ROPS: 100.4 inches (2,550 mm)
    • Wheelbase: 73.1 inches (1,857 mm)
    • Ground Clearance: 13.4 inches (340 mm)
  9. Weight:
    • Operating Weight (2WD): 2,778 lbs (1,260 kg)
    • Operating Weight (4WD): 3,362 lbs (1,525 kg)
  10. Fuel Tank Capacity:
    • 11.1 gallons (42.0 L)
  11. Lift Capacity:
    • 3,307 lbs (1,500 kg) at the pivot pin
    • 2,204 lbs (1,000 kg) 19.7 inches (500 mm) forward
  12. Turning Radius:
    • 8.9 feet (2.7 meters)
  13. Standard Equipment:
    • ROPS (Roll Over Protection Structure)
    • Telescopic Lower Link
    • Deluxe Seat with Armrest
    • Tilt Steering Wheel
    • Dual Rear Hydraulic Remote Valves (Optional)
  14. Optional Features:
    • 4WD
    • Ag or Industrial Tires
    • Front End Loader
    • Backhoe Attachment
    • Cab with Air Conditioning

Kubota L3901 Common Problems:

No machine is without its challenges. Exploring common problems associated with the Kubota L3901 allows users to anticipate issues and take preventive measures. From minor glitches to more significant concerns, being aware of potential problems is the first step in maintaining optimal functionality.

  1. Starting Issues:
    • Possible Causes: Issues with the battery, starter motor, or fuel system.
    • Solutions: Check the battery for charge, inspect the starter motor, and ensure there are no fuel flow problems.
  2. Hydraulic System Leaks:
    • Possible Causes: Damaged hydraulic hoses or connectors.
    • Solutions: Regularly inspect hydraulic components for leaks, and promptly replace damaged hoses or connectors.
  3. Overheating:
    • Possible Causes: Problems with the cooling system, such as a malfunctioning thermostat or a clogged radiator.
    • Solutions: Check and replace the thermostat if necessary, and ensure the radiator and cooling system are clean and functioning properly.
  4. Transmission Issues:
    • Possible Causes: Difficulty in shifting gears, slipping clutch, or transmission fluid problems.
    • Solutions: Adjust the clutch, check transmission fluid levels, and inspect for any signs of damage or wear.
  5. PTO (Power Take-Off) Problems:
    • Possible Causes: Issues engaging or disengaging the PTO.
    • Solutions: Inspect the PTO linkage and clutch, and ensure there are no obstructions preventing proper engagement.
  6. Electrical System Problems:
    • Possible Causes: Malfunctions in the electrical components, such as the alternator or wiring.
    • Solutions: Regularly check the battery, alternator, and wiring for any signs of wear or damage. Ensure connections are tight and secure.
  7. Steering Difficulties:
    • Possible Causes: Problems with the power steering system or damaged steering components.
    • Solutions: Check power steering fluid levels, inspect for leaks, and examine steering components for wear.
  8. Fuel System Issues:
    • Possible Causes: Clogged fuel filters or contaminated fuel.
    • Solutions: Regularly replace fuel filters, and ensure clean, quality fuel is used to prevent contamination.
  9. Front Axle Problems:
    • Possible Causes: Issues with the front axle, such as oil leaks or damage.
    • Solutions: Regularly inspect the front axle for any signs of leaks or damage, and address issues promptly.
  10. Excessive Vibration:
    • Possible Causes: Imbalance in tires, damaged drivetrain components, or misalignment.
    • Solutions: Balance the tires, inspect drivetrain components, and ensure proper alignment.

Claw Grapple for Kubota L3901:

For users seeking versatility in their Kubota L3901, a claw grapple attachment can be a game-changer. This accessory expands the machine’s capabilities, turning it into a multifunctional tool for handling various materials with precision and ease.

The claw grapple, also known as a grapple bucket or grapple rake, is typically used for tasks such as loading, lifting, and transporting materials like logs, brush, rocks, and debris. Here’s what you need to know about the claw grapple attachment for the Kubota L3901:

  1. Compatibility:
    • Before purchasing a claw grapple attachment, ensure that it is compatible with the Kubota L3901 model. Check with the equipment dealer or manufacturer to confirm compatibility and any additional requirements.
  2. Design and Construction:
    • Claw grapples come in various designs, but they generally consist of two arms with claws that can be opened and closed hydraulically. The construction is typically robust, using durable materials to withstand the demands of heavy-duty tasks.
  3. Hydraulic Operation:
    • The claw grapple is usually operated hydraulically, utilizing the tractor’s hydraulic system to control the opening and closing of the claws. Ensure that your Kubota L3901 has the necessary hydraulic capabilities to operate the grapple effectively.
  4. Versatility:
    • A claw grapple adds versatility to the Kubota L3901, allowing it to handle a wide range of materials. Whether you’re cleaning up a construction site, managing forestry operations, or handling agricultural tasks, the claw grapple can be a valuable asset.
  5. Ease of Attachment:
    • The attachment and detachment process should be relatively straightforward. Many claw grapples are designed to be compatible with quick-attach systems, making it convenient for operators to switch between different attachments.
  6. Size and Capacity:
    • Claw grapples come in various sizes and capacities. Choose a size that matches the capabilities of your Kubota L3901 and aligns with the type of tasks you intend to perform. Consider the weight and size of the materials you’ll be handling.
  7. Manufacturer Recommendations:
    • Always follow the manufacturer’s recommendations regarding the safe operation, maintenance, and any specific requirements for the claw grapple attachment. This ensures optimal performance and safety during use.
  8. Training and Familiarization:
    • Before using the claw grapple attachment, operators should be trained on its proper use and safety features. Understanding the controls and limitations of the attachment is essential for efficient and safe operation.
  9. Cost Considerations:
    • Claw grapple attachments can vary in cost, depending on factors such as size, brand, and features. Consider your budget and choose an attachment that provides the features and capabilities you need without exceeding your financial constraints.
  10. Local Regulations:
    • Be aware of any local regulations or requirements related to the use of attachments on tractors. Ensure that the claw grapple attachment complies with safety standards and regulations in your area.

Kubota L3901 Fuel Filter:

The fuel filter is a critical component in ensuring the engine’s longevity and efficiency. Regularly checking and replacing the Kubota L3901 fuel filter is a fundamental aspect of maintenance, preventing contaminants from compromising the fuel system.

Here’s what you need to know about the Kubota L3901 fuel filter:

  1. Location:
    • The fuel filter in the Kubota L3901 is typically located in the fuel line between the fuel tank and the engine. The exact location may vary slightly depending on the specific model and configuration.
  2. Type of Fuel Filter:
    • Kubota L3901 tractors generally use a cartridge-type fuel filter. The cartridge design allows for efficient filtration of impurities and contaminants from the fuel.
  3. Replacement Interval:
    • The fuel filter should be replaced at regular intervals as part of the tractor’s routine maintenance. The specific replacement interval can be found in the Kubota L3901 Parts Manual or the operator’s manual. As a general guideline, it’s often recommended to replace the fuel filter every 100 to 300 hours of operation, but this may vary.
  4. Signs of a Clogged Fuel Filter:
    • It’s crucial to be aware of signs that the fuel filter may be clogged or in need of replacement. Symptoms of a clogged fuel filter include poor engine performance, difficulty starting, loss of power, and erratic idling. If you observe any of these signs, it’s advisable to inspect and replace the fuel filter.
  5. Replacement Procedure:
    • Follow these general steps for replacing the fuel filter in a Kubota L3901:
      • Ensure the tractor is turned off and the key is removed.
      • Locate the fuel filter housing.
      • Place a container beneath the filter to catch any spilled fuel.
      • Use a wrench or a filter wrench to loosen and remove the old fuel filter.
      • Dispose of the old filter properly.
      • Apply a small amount of clean diesel fuel to the gasket of the new filter.
      • Install the new filter and tighten it securely.
      • Prime the fuel system according to the tractor’s manual to remove air from the system.
  6. Choosing the Right Replacement Filter:
    • When purchasing a replacement fuel filter, ensure that it is designed for the Kubota L3901 model. Consult the Kubota L3901 Parts Manual or contact an authorized Kubota dealer to obtain the correct filter part number.
  7. Quality and Compatibility:
    • Use high-quality fuel filters that meet or exceed Kubota’s specifications. Using non-genuine or substandard filters may compromise engine performance and longevity.

Kubota L3901 Oil Type and Filter:

The right oil type and filter are paramount for the proper functioning of the Kubota L3901 engine. Understanding the manufacturer’s recommendations and adhering to a regular oil change schedule is essential for optimal performance and durability.

Here are the recommended specifications for the oil type and filter:

Oil Type:

  1. Engine Oil:
    • Kubota generally recommends using a high-quality diesel engine oil with a classification of API CF-4, CG-4, or better.
    • SAE (Society of Automotive Engineers) viscosity rating is typically 15W-40 for general use, but the specific viscosity may vary based on climate conditions. Check the Kubota L3901 Parts Manual or the operator’s manual for precise recommendations based on your operating environment.
  2. Oil Capacity:
    • The engine oil capacity for the Kubota L3901 can be found in the operator’s manual. As a general guideline, it may hold around 7.7 quarts (7.3 liters).

Oil Filter:

  1. Oil Filter Type:
    • Kubota L3901 tractors typically use a spin-on type oil filter. The specific part number for the oil filter can be found in the Kubota L3901 Parts Manual or obtained from an authorized Kubota dealer.
  2. Replacement Interval:
    • The oil filter should be replaced during each oil change. Refer to the recommended maintenance schedule in the Kubota L3901 Parts Manual or the operator’s manual for the correct replacement interval.

Choosing the Right Oil and Filter:

  1. Kubota Genuine Oil:
    • Kubota recommends using their own genuine engine oil for optimal performance. Kubota Genuine Engine Oil is specifically formulated to meet the needs of Kubota engines.
  2. Genuine Kubota Oil Filter:
    • Kubota’s genuine oil filters are designed to work seamlessly with their engines. Using a genuine Kubota oil filter ensures proper filtration and compatibility with the engine.
  3. Quality Aftermarket Options:
    • If you choose to use aftermarket oil and filters, ensure that they meet or exceed Kubota’s specifications. Look for reputable brands that offer high-quality filters and oil with the correct viscosity and certifications.

Oil Change Procedure:

  1. Draining Old Oil:
    • Run the engine for a few minutes to warm the oil.
    • Turn off the engine and place a drain pan beneath the oil drain plug.
    • Remove the drain plug to allow the old oil to drain completely.
  2. Changing the Oil Filter:
    • Use an oil filter wrench to remove the old oil filter.
    • Apply a small amount of new oil to the rubber gasket on the top of the new oil filter.
    • Screw on the new oil filter hand-tight.
  3. Adding New Oil:
    • Replace the drain plug and refill the engine with the recommended amount and type of oil.
    • Check the oil level using the dipstick, and add oil if necessary.
  4. Running the Engine:
    • Start the engine and let it run for a few minutes.
    • Check for any leaks around the oil filter and drain plug.
    • Recheck the oil level and add more if needed.

Kubota L3901 Weight:

The weight of the Kubota L3901 is a crucial factor, influencing its transportability and stability during operation. Whether it’s for maneuvering in tight spaces or adhering to weight restrictions during transportation, being aware of the machine’s weight is integral to its safe and efficient use.

Here are approximate weights for the Kubota L3901 based on common configurations:

  1. Kubota L3901 2WD:
    • Operating Weight: Approximately 2,778 lbs (1,260 kg)
  2. Kubota L3901 4WD:
    • Operating Weight: Approximately 3,362 lbs (1,525 kg)

These weights provide a general idea of the operating weight of the Kubota L3901 without any additional attachments or modifications. Keep in mind that if you have attachments such as a loader, backhoe, or other implements, the total weight of the tractor will increase accordingly.

How to add rear hydraulics to a Kubota L3901

Adding rear hydraulics to a Kubota L3901 tractor can significantly increase its versatility by allowing you to operate hydraulic implements at the rear of the tractor.

Rear hydraulics can be used for various attachments, such as hydraulic rakes, post hole diggers, and other implements that require hydraulic power. Here are the general steps you might follow to add rear hydraulics to a Kubota L3901:

Steps to Add Rear Hydraulics to Kubota L3901:

  1. Check Tractor Compatibility:
    • Ensure that your Kubota L3901 model is compatible with adding rear hydraulics. Some tractors come from the factory with rear hydraulic outlets, while others may require modification.
  2. Consult the Operator’s Manual:
    • Refer to the operator’s manual for your specific Kubota L3901 model. It may provide information on rear hydraulic options, including compatibility and recommended procedures.
  3. Purchase Rear Hydraulic Kit:
    • Contact your local Kubota dealer or a reputable aftermarket supplier to inquire about rear hydraulic kits designed for your Kubota L3901 model. Kits may include the necessary components such as hydraulic lines, connectors, control valves, and a rear hydraulic outlet.
  4. Prepare the Tractor:
    • Park the tractor on a flat and stable surface.
    • Ensure that the tractor is turned off and the key is removed.
    • Raise the rear hitch to access the hydraulic connections.
  5. Install Hydraulic Lines:
    • Follow the instructions provided in the rear hydraulic kit to install hydraulic lines. This may involve connecting hydraulic hoses from the kit to the tractor’s hydraulic system.
  6. Install Control Valve:
    • Mount the control valve according to the kit instructions. This valve allows you to control the flow of hydraulic fluid to the rear outlets.
  7. Connect Rear Hydraulic Outlet:
    • Connect the hydraulic lines from the kit to the newly installed rear hydraulic outlet. This outlet is typically located near the rear hitch.
  8. Secure and Test:
    • Secure all connections and fastenings according to the kit instructions.
    • Start the tractor and carefully test the rear hydraulics. Check for any leaks and ensure that the hydraulic system operates smoothly.
  9. Adjust and Fine-Tune:
    • If necessary, adjust the hydraulic flow and pressure settings using the control valve. Refer to the kit instructions for guidance on making adjustments.
  10. Safety Considerations:
    • Always prioritize safety. Follow all safety guidelines and recommendations provided by Kubota and the rear hydraulic kit manufacturer.
    • Be aware of the load limits and capabilities of the rear hydraulics to prevent damage to the tractor and attachments.
  11. Professional Installation:
    • If you are not comfortable or experienced with hydraulic systems, consider having the rear hydraulics installed by a qualified technician. This ensures proper installation and reduces the risk of errors.

Remember to comply with any warranty or service agreements that may be in place for your Kubota L3901, as modifying the tractor could impact these agreements.

If in doubt, consult with your local Kubota dealer for guidance on adding rear hydraulics to your specific model.

How to change the front tire on a Kubota L3901

Changing the front tire on a Kubota L3901 tractor involves a straightforward process. Here is a general guide to help you through the steps:

Tools and Equipment Needed:

  1. Jack
  2. Jack stands
  3. Lug wrench or socket set
  4. New front tire
  5. Tire pressure gauge

Step-by-Step Procedure:

  1. Safety First:
    • Park the tractor on a level surface and engage the parking brake.
    • Ensure the tractor is turned off, and the key is removed.
    • Use proper personal protective equipment, including gloves and safety glasses.
  2. Prepare the Work Area:
    • Place wheel chocks behind the rear tires to prevent the tractor from rolling.
    • If possible, use a solid and level surface to jack up the tractor.
  3. Loosen Lug Nuts:
    • Use a lug wrench or a socket set to slightly loosen the lug nuts on the front wheel. Do not remove them completely at this point.
  4. Jack Up the Front of the Tractor:
    • Locate a suitable jacking point on the front of the tractor. Refer to the operator’s manual for recommended jacking points.
    • Carefully lift the front of the tractor using a hydraulic jack. Ensure that the tractor is stable before proceeding.
  5. Secure the Tractor with Jack Stands:
    • Once the tractor is lifted, place jack stands under the front axle or frame to secure it in the raised position. This adds an extra layer of safety.
  6. Remove Lug Nuts and Take off the Wheel:
    • Finish removing the lug nuts using the lug wrench or socket set.
    • Carefully take off the front wheel and set it aside.
  7. Inspect and Prepare the Replacement Tire:
    • Before installing the new tire, inspect it for any defects or damage.
    • Ensure that the new tire matches the size and specifications recommended for your Kubota L3901.
  8. Install the New Tire:
    • Carefully mount the new tire onto the front axle.
    • Hand-tighten the lug nuts onto the wheel studs to hold the tire in place.
  9. Tighten Lug Nuts:
    • Use the lug wrench or socket set to tighten the lug nuts in a crisscross pattern. This helps ensure even pressure on the wheel.
    • Tighten the lug nuts as much as possible while the tractor is still on the jack stands.
  10. Lower the Tractor:
    • Carefully remove the jack stands and slowly lower the tractor using the hydraulic jack.
  11. Final Tightening of Lug Nuts:
    • Once the tractor is on the ground, finish tightening the lug nuts in the crisscross pattern.
    • Use a torque wrench to tighten the lug nuts to the manufacturer’s recommended torque specifications. Refer to the operator’s manual for this information.
  12. Check Tire Pressure:
    • Use a tire pressure gauge to check and adjust the air pressure in the new tire according to the recommended specifications.
  13. Repeat for the Other Front Tire:
    • If you are changing both front tires, repeat the process for the other side.


In conclusion, a thorough understanding of Kubota L3901 parts is indispensable for owners, operators, and technicians alike.

From parts diagrams and catalogs to manuals and specifications, this comprehensive guide provides valuable insights into maximizing the performance and longevity of the Kubota L3901.

Whether addressing common problems, exploring enhancements, or ensuring proper maintenance, this guide equips users with the knowledge needed to make the most of their Kubota L3901 experience.