Kubota L3400 Parts and Parts Manual PDF

Kubota L3400 Parts

If you own a Kubota L3400 tractor, then you understand the importance of keeping it in optimal condition to ensure its longevity and performance.

Regular maintenance and occasional repairs are part and parcel of tractor ownership. To make these tasks easier, having access to a Kubota L3400 parts manual in PDF format can be a game-changer.

In this article, we’ll explore everything you need to know about Kubota L3400 parts and provide you with valuable information on where to find a parts manual in PDF format.

Kubota L3400 Parts Overview

Before delving into the specifics of a parts manual, let’s take a closer look at the essential components and parts of the Kubota L3400 tractor. This will help you understand the various elements that require maintenance and replacement over time.

Kubota L3400 Body Parts

The body of your Kubota L3400 is what gives it its distinctive appearance. Body parts include the hood, fenders, and various panels that make up the exterior of the tractor. If your tractor’s body parts are damaged or worn, it’s essential to replace them to maintain its appearance and structural integrity.

Kubota L3400 Parts Hydraulic Hose

The hydraulic system of the Kubota L3400 is responsible for powering attachments and various functions. The hydraulic hose is a crucial component of this system, and regular inspection and replacement are necessary to prevent leaks and ensure smooth operation.

Kubota L3400 HST Parts

The Hydrostatic Transmission (HST) system is a key feature of the Kubota L3400, providing smooth and efficient power transfer. HST parts, including pumps and motors, should be checked and replaced as needed to maintain proper functionality.

Kubota L3400 Parts Hydraulic Fluid

Hydraulic fluid is the lifeblood of the hydraulic system. Regularly check the fluid level and quality to ensure proper lubrication and functioning of hydraulic components. Replenish or replace the hydraulic fluid as recommended in the maintenance schedule.

Kubota L3400 3 Point Hitch Parts

The 3-point hitch system on the Kubota L3400 allows for the attachment of various implements, such as plows and mowers. Inspect and maintain 3-point hitch parts to ensure safe and effective attachment and operation of implements.

Kubota L3400 Parts List

A comprehensive parts list is a valuable resource for tractor owners. It provides detailed information about every part and component of your Kubota L3400, making it easier to identify and order the parts you need for maintenance or repairs.

Kubota L3400 Specs

Understanding the specifications of your tractor, including engine power, weight, and dimensions, is essential for proper operation and maintenance. The Kubota L3400 specs can help you make informed decisions about attachments and accessories.

Kubota L3400 Oil Filter

Regularly changing the oil filter is essential to maintain the engine’s health. The oil filter helps remove contaminants from the engine oil, preventing damage to engine components.

Kubota L3400 Oil Capacity

Knowing the oil capacity of your tractor’s engine ensures that you add the right amount of oil during oil changes, preventing overfilling or underfilling, which can lead to engine issues.

Kubota L3400 Fuel Filter

A clean fuel filter is crucial for efficient fuel delivery to the engine. Regularly replace the fuel filter to prevent clogs and maintain engine performance.

Kubota L3400 Attachments

Kubota offers a wide range of attachments for the L3400, from loaders to backhoes. Understanding the compatibility and maintenance requirements of these attachments is essential for their proper use.

Kubota L3400 Air Filter

The air filter is responsible for keeping dust and debris out of the engine, ensuring clean air intake. Replace the air filter at regular intervals to prevent engine damage due to contaminants.

Kubota L3400 Oil Type

Using the correct oil type is crucial for engine longevity and performance. Consult your owner’s manual for the recommended oil type and change it as specified in the maintenance schedule.

Kubota L3400 Battery

A properly functioning battery is essential for starting your tractor. Regularly check the battery’s condition, clean the terminals, and replace it if necessary to avoid unexpected starting issues.

Kubota L3400 Service Manual PDF

Now that we’ve covered the essential parts and components, let’s discuss the importance of a Kubota L3400 service manual in PDF format.

A service manual is an invaluable resource for tractor owners and mechanics alike. It provides detailed instructions and diagrams for maintenance, troubleshooting, and repair tasks.

Having the manual in PDF format allows for easy access on digital devices, making it convenient to search for specific information and view diagrams and illustrations on the go.

You can often find PDF versions of the Kubota L3400 service manual online, either through Kubota’s official website or reputable third-party sources.

Kubota L3400 Seat

The operator’s seat plays a crucial role in comfort during long hours of tractor operation. Ensure that the seat is in good condition and replace it if it’s worn or damaged.

Kubota L3400 Wheel Spacer

Wheel spacers can be used to adjust the track width of the tractor for specific tasks or terrain. Understanding their proper use and maintenance is essential for safe and effective operation.

Kubota L3400 Power Steering Pump

The power steering pump assists in steering the tractor and reduces operator fatigue. Regularly inspect and maintain the power steering system, including the pump, to ensure responsive steering.

Kubota L3400 Safety Switches

Safety switches are critical for preventing accidents and injuries. Ensure that all safety switches on your Kubota L3400 are in working order and replace any faulty switches promptly.

Kubota L3400 Hydrostatic Transmission

The hydrostatic transmission is a hallmark feature of the Kubota L3400, providing smooth and precise control. Regular maintenance of the transmission is essential for its longevity and performance.

Owning and maintaining a Kubota L3400 tractor comes with its responsibilities, including regular inspections, maintenance, and occasional part replacements.

A Kubota L3400 parts manual in PDF format is a valuable tool that can assist you in these tasks, providing detailed information and diagrams to keep your tractor in top-notch condition.

Additionally, understanding the key components and specifications of your L3400 will help you make informed decisions about maintenance and improvements, ensuring that your tractor continues to serve you reliably for years to come.

What type of engine is in the Kubota L3400

The Kubota L3400 tractor is equipped with a 3-cylinder, liquid-cooled diesel engine. The original engine used in the L3400 from 2004 to 2008 has a displacement of 100.5 cubic inches (1.6 liters) and a bore/stroke of 3.425×3.638 inches. The engine produces a gross power of 34.7 horsepower (25.9 kilowatts).

Key specifications for this engine:

  • Engine Type: Kubota D1703-M-DI
  • Engine Displacement: 1.647 liters (100.3 cubic inches)
  • Number of Cylinders: 3
  • Aspiration: Natural
  • Gross Horsepower: Approximately 34 horsepower
  • Power Take-Off (PTO) Horsepower: Approximately 27.5 horsepower
  • Cooling: Liquid-cooled
  • Fuel: Diesel

How to check the hydraulic level on a Kubota L3400

To check the hydraulic fluid level  you can follow these steps:

  1. Park the tractor on a level surface and engage the parking brake for safety.
  2. Locate the hydraulic fluid reservoir. On the L3400, it is typically located on the left side of the tractor, near the clutch pedal, and has a small round sight glass
  3. Clean the area around the sight glass to ensure a clear view of the fluid level.
  4. With the engine off, remove the cap from the sight glass.
  5. Look through the sight glass to check the fluid level. The fluid should be visible and should touch the bottom of the sight glass when the reservoir is full. If the fluid level is below the sight glass, you may need to add more hydraulic fluid
  6. If you need to add hydraulic fluid, use a funnel to pour the fluid into the reservoir. Be careful not to overfill the reservoir, as this can cause damage to the hydraulic system.
  7. After adding or checking the hydraulic fluid level, securely replace the cap on the sight glass and ensure it is properly tightened.
  8. Start the tractor and operate the hydraulic system to check for any issues with the performance. If the performance issues persist, you may need to consult a professional for further troubleshooting.

How to take off the oil filter on a Kubota L3400

Changing the oil filter on a Kubota L3400 tractor is a relatively simple process, but it’s essential to follow safety precautions and use the right tools.

Tools and Materials You’ll Need:

  1. New oil filter
  2. Oil drain pan
  3. Oil filter wrench or strap wrench
  4. Disposable gloves
  5. Safety glasses

Steps to Remove the Oil Filter on a Kubota L3400:

  1. Prepare Your Work Area:
    • Park the tractor on a level surface and engage the parking brake.
    • Allow the engine to cool down if it has been running recently to avoid burns from hot oil.
    • Put on disposable gloves and safety glasses to protect your hands and eyes.
  2. Locate the Oil Filter:
    • The oil filter on the Kubota L3400 is typically located on the engine block. Refer to your tractor’s manual or consult a parts diagram if you’re unsure of its location.
  3. Position the Oil Drain Pan:
    • Place the oil drain pan underneath the oil filter to catch any oil that may spill when you remove it.
  4. Loosen the Oil Filter:
    • Use an oil filter wrench or strap wrench to loosen the oil filter. Turn it counterclockwise (lefty loosey) to loosen it.
    • Be prepared for some oil to start draining out when you break the seal. Ensure that the drain pan is properly positioned to catch the oil.
  5. Remove the Oil Filter:
    • Once the oil filter is loosened, continue turning it counterclockwise until you can unscrew it by hand.
    • Be cautious as you remove it to avoid spilling more oil.
    • Drain any remaining oil from the filter into the drain pan.
  6. Clean the Mounting Surface:
    • Use a clean, lint-free cloth or paper towel to wipe the mounting surface where the oil filter was attached. Ensure there are no old gasket remnants left behind.
  7. Prepare the New Oil Filter:
    • Before installing the new oil filter, apply a small amount of clean engine oil to the rubber gasket on the top of the filter. This will help create a good seal and make it easier to remove the filter during the next oil change.
  8. Install the New Oil Filter:
    • Screw the new oil filter onto the engine by hand. You don’t need to use a wrench for this step. Tighten it until the gasket makes contact with the mounting surface, then give it an additional 3/4 to 1 turn to secure it. Refer to the filter manufacturer’s instructions if there are specific guidelines.
  9. Dispose of the Old Oil Filter:
    • Dispose of the old oil filter properly. Most auto parts stores or recycling centers will accept used oil filters. Make sure to follow local environmental regulations for disposal.
  10. Add New Engine Oil:
    • After replacing the oil filter, you’ll need to add the appropriate amount of new engine oil to your Kubota L3400. Refer to your owner’s manual for the recommended oil type and capacity.
  11. Check for Leaks:
    • Start the engine and let it run for a few minutes, then check around the oil filter for any signs of leaks. If you notice any leaks, shut off the engine and tighten the filter slightly.
  12. Dispose of Old Oil:
    • Don’t forget to properly dispose of the used oil from the drain pan. Many auto parts stores or recycling centers offer oil recycling services.
  13. Record the Oil Change:
    • Make a note of the date and mileage (or hours) of your tractor to keep track of when the next oil change is due.

How to drain the cooling system on a Kubota L3400

To drain the cooling system on a Kubota L3400, follow these steps:

  1. Safety precautions:
    • Only remove the radiator cap when the engine is cool enough to touch with bare hands
    • Slowly loosen the cap to the first stop to relieve pressure before removing it completely
  2. Locate the drain plug:
    • The drain plug is located at the bottom of the radiator
    • Some users have reported difficulty finding the drain plug on the L3400, so consult the tractor’s manual or seek assistance from a Kubota dealer if needed
  3. Prepare for coolant drainage:
    • Place a suitable container or drain pan beneath the radiator drain plug to catch the coolant.
  4. Drain the coolant:
    • Open the radiator drain plug to allow the coolant to flow out into the container or drain pan.
    • Depending on the maintenance history of your tractor, you may need to drain the coolant multiple times to ensure a thorough flush
  5. Flush the cooling system (optional):
    • If you want to flush the cooling system, you can add a cooling system cleaner and then perform a few flushes with just water
    • Consult the tractor’s manual or seek assistance from a Kubota dealer for specific instructions on using a cooling system cleaner.
  6. Refill the cooling system:
    • Close the radiator drain plug once the coolant has finished draining.
    • Refill the cooling system with the appropriate coolant mixture, following the manufacturer’s recommendations for your specific climate and operating conditions.

Check the coolant level in the overflow bottle and top it up if necessary

How to replace the hood latch on a Kubota L3400

To replace the hood latch, follow these steps:

  1. Open the hood: Press the hood down firmly while giving the latch a quick turn
    If the latch is stuck, you may need to consult a dealer for assistance
  2. Remove the hood: Once the hood is open, you can remove it by following the instructions in this video for a Kubota L3901, L3301, or L2501 tractor. The process should be similar for the L3400.
  3. Locate the hood latch: The hood latch is the mechanism that secures the hood in place. It may be attached to the hood or the body of the tractor, depending on the specific model.
  4. Remove the old latch: Disconnect any bolts, screws, or other fasteners holding the old latch in place. Take note of the latch’s orientation and how it is attached to the hood or body.
  5. Install the new latch: Position the new latch in the same orientation as the old one and secure it with the appropriate fasteners. Make sure the latch is aligned properly to ensure the hood closes and latches correctly.
  6. Test the new latch: Close the hood and ensure that the new latch functions properly. If the hood does not close or latch correctly, double-check the latch’s alignment and installation.

How to attach a loader to a Kubota L3400

Attaching a loader to a Kubota L3400 tractor involves several steps to ensure it’s done safely and correctly. Before you start, ensure that the tractor is parked on a level surface, the engine is turned off, and the key is removed from the ignition for safety reasons.

Materials and Tools:

  1. Kubota L3400 tractor
  2. Loader attachment
  3. Loader arms
  4. Mounting pins and hardware
  5. Hydraulic hoses and couplers
  6. Hydraulic fluid
  7. Operator’s manual for the tractor and loader


  1. Prepare the Tractor:
    • Park the tractor on a level surface and engage the parking brake.
    • Shut off the engine and remove the key from the ignition.
    • Ensure that the hydraulic control levers are in the neutral position.
  2. Position the Loader Attachment:
    • Position the loader attachment near the front of the tractor, ensuring it is aligned with the loader mounting points on the tractor’s frame.
  3. Connect Mounting Pins:
    • Attach the loader arms to the loader attachment using the mounting pins provided. Make sure these pins are securely fastened.
  4. Hydraulic Connections:
    • Locate the hydraulic ports on the loader attachment.
    • Connect the hydraulic hoses from the loader to the corresponding hydraulic ports on the tractor. Typically, these connections are color-coded or labeled to ensure the correct pairing. Ensure that the hydraulic hoses are connected securely, and there are no kinks or damage in the hoses.
    • Attach the hydraulic couplers to secure the connections.
  5. Check Hydraulic Fluid Level:
    • Check the hydraulic fluid level in the tractor’s hydraulic reservoir. Top up the hydraulic fluid if necessary according to the specifications in your tractor’s operator’s manual.
  6. Raise the Loader:
    • Start the tractor’s engine and let it warm up.
    • Use the tractor’s hydraulic control lever to raise the loader attachment. Test the loader’s functionality to ensure it responds to the control inputs correctly.
  7. Securely Attach Loader:
    • Double-check that all connections, pins, and mounting hardware are securely fastened. Ensure there are no loose parts or bolts.
  8. Test the Loader:
    • With the loader attached, test its functions, such as lifting, lowering, tilting, and dumping, to ensure they operate smoothly and safely.
  9. Operate Safely:
    • Read and follow the safety instructions provided in the operator’s manuals for both the tractor and loader.
    • Always use the loader attachment with caution and follow proper safety protocols when working with heavy machinery.
  10. Maintenance:
    • Regularly inspect and maintain the loader attachment and its components as per the manufacturer’s recommendations.

Where is the Hydrostatic Clutch Filter on a Kubota L3400

The Kubota L3400 tractor is equipped with a hydrostatic transmission system. The hydrostatic transmission system typically includes a hydraulic oil filter to help keep the hydraulic fluid clean and free from contaminants.

The location of the hydrostatic clutch filter on a Kubota L3400 tractor may vary depending on the specific model year and configuration.

However, the filter is generally located in the hydraulic system, often near the hydrostatic transmission components.

  1. Park the tractor on a level surface and engage the parking brake.
  2. Turn off the engine and allow it to cool down.
  3. Locate the hydraulic system components, which may be located under the seat, behind the operator’s platform, or in the front of the tractor.
  4. Identify the hydrostatic clutch filter, which is a cylindrical or rectangular component with a threaded cap or cover.
  5. Place a drain pan under the filter to catch any spilled fluid.
  6. Carefully remove the cap or cover of the filter, taking care not to damage the gasket or O-ring.
  7. Allow the fluid to drain completely into the drain pan.
  8. Inspect the old filter for any signs of damage or excessive debris. If necessary, replace the filter with a new one.
  9. Clean the filter housing and install the new filter, ensuring that the gasket or O-ring is properly seated.
  10. Tighten the cap or cover of the filter to the manufacturer’s specifications.
  11. Refill the hydraulic system with the recommended fluid, taking care not to overfill.
  12. Start the engine and check for any leaks or abnormal operation of the hydrostatic clutch.
  13. If everything is functioning properly, lower the tractor from any raised positions and resume normal operation.