Kubota ZD25 Parts and Parts Manual PDF

Kubota ZD25 Parts

The Kubota ZD25 is a powerful and reliable zero-turn mower that has become a favourite among landscaping professionals and homeowners alike.

To ensure optimal performance and longevity, understanding its various components and their maintenance is crucial. In this article, we look at Kubota ZD25 parts, exploring the Parts Manual PDF, Parts Diagram, and Parts List.

Additionally, we will discuss the availability of used and salvaged parts, common problems associated with the Kubota ZD25, and key components such as the mower deck, transmission fluid system, fuel filter, blades, grass catcher, battery, and fuel pick-up assembly.

Kubota ZD25 Parts Manual PDF:

The Parts Manual for the Kubota ZD25 is an invaluable resource for anyone looking to understand the mower’s anatomy.

The PDF format makes it easily accessible, allowing users to navigate through exploded views, part numbers, and comprehensive diagrams. This manual serves as a roadmap for troubleshooting, maintenance, and ordering replacement parts, ensuring the mower remains in top-notch condition.


  1. Introduction: Provides an overview of the manual and instructions on how to use it.
  2. Table of Contents: Lists all the sections and subsections for easy navigation.
  3. Illustrations and Diagrams: Visual representations of the various parts and components of the equipment.
  4. Part Numbers and Descriptions: A comprehensive list of parts, each accompanied by a part number and a description.
  5. Assembly and Disassembly Instructions: Step-by-step guidance on how to assemble and disassemble specific components.
  6. Exploded Views: Visual breakdowns of assemblies, showing how individual parts fit together.
  7. Troubleshooting: Information on common issues, their potential causes, and suggested solutions.
  8. Maintenance Instructions: Guidelines for routine maintenance procedures, including recommended schedules and lubrication points.
  9. Specifications: Technical details about the equipment, including dimensions, tolerances, and other relevant information.
  10. Index: A comprehensive index to help users quickly locate information.

Kubota ZD25 Parts Diagram:

Visual learners will appreciate the detailed Parts Diagram provided by Kubota. This visual representation offers a clear understanding of how different components interact within the machinery.

The diagram aids in identifying specific parts, facilitating easy troubleshooting and maintenance. Whether you’re a seasoned mechanic or a novice user, the Parts Diagram simplifies the complexities of the Kubota ZD25.

Kubota ZD25 Parts List:

Accompanying the Parts Manual and Diagram is the Parts List, which catalogues every individual component of the Kubota ZD25.

This comprehensive list includes descriptions, part numbers, and quantities, making it an indispensable reference for part identification and ordering. By having a detailed Parts List at your disposal, you can streamline the process of obtaining the right components for your mower.

  1. Engine: The engine is a critical component that provides power to the mower. It may be a gasoline or diesel engine, depending on the model.
  2. Cutting Deck: This is the part of the mower that houses the cutting blades. Kubota zero-turn mowers come with different deck sizes, and the cutting deck is essential for achieving an efficient and even cut.
  3. Blades: The cutting blades are attached to the cutting deck and are responsible for cutting the grass. Regular maintenance and blade sharpening are important for optimal cutting performance.
  4. Hydrostatic Transmission: Zero-turn mowers typically use hydrostatic transmissions, allowing for precise control of speed and direction. This system uses hydraulic fluid to transfer power from the engine to the wheels.
  5. Control Levers or Steering Bars: Kubota zero-turn mowers are known for their maneuverability, which is controlled by steering levers or bars. These controls enable the operator to turn the mower in a zero-radius circle.
  6. Wheels and Tires: The mower’s wheels and tires are crucial for stability and traction. Depending on the model, zero-turn mowers may have larger rear tires for better traction.
  7. Seat and Operator Platform: The operator’s seat and platform provide a comfortable and ergonomic workspace for the person operating the mower.
  8. Fuel System: This includes the fuel tank, fuel pump, and fuel filter. Proper maintenance of the fuel system is essential for the mower’s performance.
  9. Electrical System: This system includes the battery, starter motor, alternator, and wiring. It is responsible for starting the engine and powering electrical components.
  10. Safety Features: Kubota zero-turn mowers come with safety features such as roll-over protection systems (ROPS), seat belts, and operator presence controls to ensure safe operation.
  11. Deck Lift Mechanism: Some mowers have a mechanism that allows the operator to raise and lower the cutting deck for height adjustment.

Kubota ZD25 Used and Salvaged Parts:

For budget-conscious consumers or those dealing with discontinued parts, exploring the market for used and salvaged Kubota ZD25 parts is a viable option.

Many dealers and online platforms specialize in providing quality, refurbished components that can breathe new life into your mower. Whether you’re in need of a specific engine part or a replacement for the mower deck, the availability of used and salvaged parts offers a cost-effective solution.

Kubota ZD25 Mower Deck Parts:

The mower deck is a critical component of the Kubota ZD25, responsible for delivering a precise and even cut. Regular maintenance and prompt replacement of worn-out parts are essential to uphold the mower’s cutting performance.

From blades and belts to spindles and pulleys, understanding the intricacies of the mower deck parts ensures a well-maintained and efficient cutting system.

  1. Spindles: Spindles are shafts that house the mower blades. They rotate and generate the cutting action.
  2. Blades: Mower blades are responsible for cutting the grass. Kubota ZD25 may have multiple blades on its cutting deck.
  3. Pulleys: Pulleys are used to transfer power from the mower’s engine to the blades. There may be various pulleys for different functions, such as blade engagement and belt routing.
  4. Belts: Belts are crucial for transferring power from the mower’s engine to the blades. These can include drive belts and deck belts.
  5. Idler Pulleys: Idler pulleys help maintain tension on the belts and ensure proper operation.
  6. Deck Shell or Housing: The deck shell or housing is the main structure that encloses the blades and cutting system.
  7. Deck Wheels: Deck wheels help support the mower deck and maintain the desired cutting height. They can also prevent scalping on uneven terrain.
  8. Height Adjustment Mechanism: This mechanism allows the operator to adjust the cutting height of the mower deck.
  9. Anti-Scalp Rollers: These rollers help prevent the mower deck from scalping the lawn by maintaining an even cutting height, especially on uneven surfaces.
  10. Deck Lift System: Some mowers have a hydraulic or mechanical system that allows the operator to raise or lower the mower deck for height adjustment.
  11. Baffles and Chutes: These components help guide the grass clippings from the cutting deck to the collection system.

Kubota ZD25 Problems:

Like any machinery, the Kubota ZD25 may encounter issues over time. Common problems include engine-related issues, transmission malfunctions, and electrical failures.

Understanding these potential challenges and addressing them promptly through troubleshooting or seeking professional assistance can prolong the life of your mower and prevent costly repairs.

  1. Engine Issues:
    • Starting Problems: Check the fuel level, battery condition, and ensure the spark plug is in good condition.
    • Overheating: Ensure proper cooling by checking the radiator, cooling fins, and cooling system components.
  2. Mower Deck Problems:
    • Uneven Cutting: Check blade sharpness, balance, and ensure that the deck is level. Adjust the deck height as needed.
    • Belt Issues: Inspect belts for wear, tension, and proper alignment. Replace any damaged or worn belts.
  3. Hydrostatic Transmission Issues:
    • Loss of Power: Check the hydraulic fluid level and condition. If the fluid is low or dirty, it can affect performance.
    • Leaking Fluid: Inspect for leaks in hoses, fittings, or the transmission itself.
  4. Steering and Maneuverability:
    • Control Lever Issues: Ensure control levers or steering bars are functioning properly and not sticking.
    • Tire Pressure: Check and adjust tire pressure for proper traction and maneuverability.
  5. Electrical Problems:
    • Battery Issues: Ensure the battery is charged and connections are clean and tight.
    • Wiring Problems: Inspect wiring for any damage or loose connections.
  6. General Maintenance:
    • Air Filter: Check and replace the air filter if it’s dirty or clogged.
    • Fuel System: Ensure the fuel system is clean, and the fuel filter is not clogged.
    • Regular Maintenance: Follow the manufacturer’s recommended maintenance schedule for oil changes, filter replacements, and other routine tasks.

Kubota ZD25 Grass Catcher:

Efficient grass collection is crucial for maintaining a neat and well-groomed lawn. The Kubota ZD25 grass catcher is designed to enhance the mower’s grass disposal capabilities.

Regular cleaning and maintenance of the grass catcher, including inspecting bags, frames, and chute components, are essential for optimal performance during mowing sessions.

  1. Compatibility: Ensure that the grass catcher is compatible with the Kubota ZD25 model. Kubota often provides specific grass catcher options designed for their mowers.
  2. Capacity: Grass catchers come in various sizes, and the capacity determines how much grass the catcher can hold before needing to be emptied. Consider your lawn size and mowing needs when selecting a grass catcher.
  3. Installation: Grass catchers are typically designed to be easily attached and removed. Follow the manufacturer’s instructions or the guidelines provided in the operator’s manual for proper installation.
  4. Emptying the Grass Catcher: Check how the grass catcher is emptied. Some models may have a quick-release mechanism, making it convenient to empty the clippings without much hassle.
  5. Maintenance: Regularly clean and maintain the grass catcher to ensure proper performance. Clear any debris or grass clippings that may accumulate during use.
  6. Bag Material: Grass catchers often have bags made of durable materials. Ensure that the bag material is sturdy and can withstand regular use.
  7. Collection System Design: Grass catchers may use various collection system designs, including twin-bag systems or other configurations. Choose a design that suits your preferences and needs.
  8. Purchase from Authorized Dealers: To ensure compatibility and quality, consider purchasing grass catchers or bagging systems from authorized Kubota dealers or reputable suppliers.

Kubota ZD25 Transmission Fluid Level:

Maintaining the correct transmission fluid level is vital for the proper functioning of the Kubota ZD25. Regular checks, especially before each mowing season, can prevent premature wear and damage to the transmission system.

Understanding the proper procedure for checking and, if necessary, replenishing the transmission fluid ensures the mower operates smoothly and efficiently.

Replacing Fuel Filter on a ZD25 Kubota:

The fuel filter plays a crucial role in ensuring clean fuel reaches the engine, preventing contaminants from causing damage. Regularly replacing the fuel filter on the Kubota ZD25 is essential for maintaining fuel efficiency and preventing potential engine issues. Understanding the replacement process is crucial for users who prefer to handle basic maintenance tasks themselves.

  1. Gather Materials:
    • New fuel filter (make sure it is the correct model for your ZD25).
    • A container to catch any spilled fuel.
    • Safety glasses and gloves.
  2. Safety Precautions:
    • Park the mower on a flat, level surface.
    • Engage the parking brake.
    • Turn off the engine and allow it to cool.
  3. Locate the Fuel Filter:
    • The fuel filter is typically located along the fuel line between the fuel tank and the engine. Consult your operator’s manual for the exact location on the ZD25 model.
  4. Prepare for Fuel Spillage:
    • Place a container under the fuel filter to catch any fuel that may spill during the replacement.
  5. Release Fuel System Pressure:
    • If your mower has a fuel system pressure relief valve, use it to release any pressure in the system. If not, be prepared for a small amount of fuel to be released when removing the filter.
  6. Remove the Old Fuel Filter:
    • Wear safety glasses and gloves.
    • Use a wrench or the appropriate tool to loosen and remove the old fuel filter.
    • Be cautious of any remaining fuel in the filter.
  7. Install the New Fuel Filter:
    • Apply a small amount of clean diesel or engine oil to the rubber gasket on the top of the new fuel filter.
    • Thread the new fuel filter onto the housing by hand until snug. Then use a wrench to tighten it slightly.
  8. Check for Leaks:
    • Once the new fuel filter is installed, check for any signs of leaks around the filter.
  9. Prime the Fuel System (if needed):
    • Some fuel systems may require priming after a filter change. Follow your operator’s manual for instructions on priming the fuel system if necessary.
  10. Dispose of the Old Fuel Filter:
    • Properly dispose of the old fuel filter according to local regulations.
  11. Record the Maintenance:
    • Record the date of the filter change in your mower’s maintenance log.

Kubota ZD25 60″ Blades:

The cutting blades are the workhorses of the Kubota ZD25, determining the quality and precision of the cut. The 60″ blades are a popular choice for users looking to cover large areas efficiently. Regular inspection, sharpening, and replacement of blades are vital for achieving a clean and professional-looking lawn.

For the Kubota ZD25 with a 60″ cutting deck, you’ll need to use blades that are specifically designed for that deck size. The blade size for a 60″ deck is typically around 20 inches in length. However, it’s important to note that the specific blade size can vary depending on the mower model and year.

When purchasing replacement blades for your Kubota ZD25 with a 60″ deck, consider the following:

  1. Check the Operator’s Manual: Refer to your Kubota ZD25 operator’s manual for the correct specifications, including the recommended blade size for the 60″ cutting deck.
  2. Consult the Dealership: Contact your local Kubota dealership and provide them with your mower model and deck size information. They can supply you with the correct replacement blades or guide you to the right product.
  3. Blade Type: Blades can be categorized as high-lift, low-lift, or mulching blades. Choose the type that best suits your mowing needs.
  4. Quality and Compatibility: Ensure that the replacement blades are of high quality and designed to fit Kubota mowers. Using genuine Kubota parts or reputable aftermarket blades is advisable.
  5. Maintenance Kit: Some manufacturers offer maintenance kits that include blades, filters, and other essential items for a complete maintenance routine. This can be a convenient option.

When replacing blades, it’s also important to follow proper safety precautions, such as disconnecting the spark plug, wearing safety glasses and gloves, and ensuring the mower is on a flat, stable surface. Always refer to the specific instructions provided in the operator’s manual for your Kubota ZD25 model.

ZD25 Kubota Fuel Pick-Up Assembly:

The fuel pick-up assembly is a critical component responsible for drawing fuel from the tank to the engine. Understanding its role and the signs of potential issues, such as poor fuel delivery, can help users identify and address problems promptly. Regular inspection and, if necessary, replacement of the fuel pick-up assembly contribute to the overall reliability of the Kubota ZD25.

Here are some general steps and considerations if you need to work on or replace it:

  1. Refer to the Operator’s Manual:
    • Consult the Kubota ZD25 operator’s manual for specific information about the fuel pick-up assembly, its location, and any maintenance or replacement procedures.
  2. Safety First:
    • Before working on any part of the fuel system, ensure that the mower is turned off, and disconnect the spark plug to prevent accidental starts.
  3. Locate the Fuel Pick-Up Assembly:
    • Identify the location of the fuel pick-up assembly. It is typically located inside the fuel tank.
  4. Drain the Fuel Tank:
    • If necessary, drain the fuel tank to reduce the fuel level below the point where the fuel pick-up assembly is located.
  5. Access the Fuel Tank:
    • Depending on the mower’s design, you may need to remove panels or access covers to reach the fuel tank.
  6. Remove the Fuel Pick-Up Assembly:
    • Disconnect any hoses or connections leading to the fuel pick-up assembly.
    • Carefully remove the fuel pick-up assembly from the fuel tank.
  7. Inspect for Damage or Contamination:
    • Check the fuel pick-up assembly for any signs of damage or contamination. Clean or replace components as needed.
  8. Replacement:
    • If replacement is necessary, obtain a genuine Kubota replacement part or an equivalent that meets the manufacturer’s specifications.
  9. Reinstallation:
    • Install the new or cleaned fuel pick-up assembly back into the fuel tank.
    • Reconnect any hoses or connections.
  10. Refill the Fuel Tank:
    • Refill the fuel tank with clean, fresh fuel.
  11. Check for Leaks:
    • After reinstallation, check for any fuel leaks around the fuel pick-up assembly and connections.
  12. Test Operation:
    • Start the mower and monitor the fuel system for proper operation.

Kubota ZD25 Battery:

The battery is the heart of the mower’s electrical system, providing the necessary power to start the engine and operate electrical components.

Regular maintenance, including cleaning terminals and checking the battery’s overall health, is essential for preventing unexpected breakdowns. Understanding the specifications and choosing the right battery for the Kubota ZD25 is crucial for optimal performance.

  1. Battery Type:
    • The ZD25 likely uses a standard 12-volt lead-acid battery. It’s important to check the specifications in the operator’s manual or consult with your Kubota dealership for the exact battery type recommended for your model.
  2. Battery Capacity:
    • The battery capacity is measured in ampere-hours (Ah). Ensure that the replacement battery has a capacity suitable for your mower’s power requirements. The specific capacity may vary, so consult the manual for guidance.
  3. Cranking Amps (CA) and Cold Cranking Amps (CCA):
    • Check the cranking amps (CA) or cold cranking amps (CCA) rating of the battery. This rating indicates the battery’s ability to start the engine in different temperature conditions. Choose a battery that meets or exceeds the requirements specified in the manual.
  4. Physical Size:
    • Ensure that the physical dimensions of the replacement battery fit the designated battery compartment on the mower.
  5. Maintenance-Free vs. Maintenance-Required:
    • Some batteries are labeled as maintenance-free, while others may require periodic checking of fluid levels. Choose a type that aligns with your maintenance preferences.
  6. Brand and Quality:
    • Consider purchasing a high-quality battery from a reputable brand or Kubota-authorized supplier to ensure reliability and longevity.
  7. Charging System:
    • Check the charging system of your mower to ensure that it is functioning properly. A malfunctioning charging system can lead to battery issues. If the battery frequently discharges, it may be a sign of a charging system problem.
  8. Installation:
    • Follow the manufacturer’s guidelines and safety precautions when installing or replacing the battery. Ensure that the battery terminals are securely connected.
  9. Maintenance and Storage:
    • Regularly check the battery for signs of corrosion, and clean the terminals as needed. If storing the mower for an extended period, consider disconnecting the battery or using a battery maintainer to prevent discharge.


In conclusion, a comprehensive understanding of Kubota ZD25 parts is essential for maintaining the mower’s performance and longevity. Whether you’re consulting the Parts Manual PDF, referencing the Parts Diagram, or exploring the Parts List, having access to these resources is invaluable.

Additionally, being aware of the availability of used and salvaged parts, addressing common problems, and maintaining key components such as the mower deck, transmission fluid system, fuel filter, blades, grass catcher, battery, and fuel pick-up assembly will contribute to a well-maintained and efficient Kubota ZD25.

By incorporating these practices into your maintenance routine, you’ll ensure that your Kubota ZD25 remains a reliable partner in keeping your lawn pristine.