Kubota ZD28 Parts and Parts Manual PDF

Kubota ZD28 Parts

If you own a Kubota ZD28 mower, you’re likely aware of its reliability and performance. However, like any piece of machinery, it may require maintenance and replacement parts from time to time.

In this article, we will explore the world of Kubota ZD28 parts, from a comprehensive parts list to essential maintenance components like oil filters, mower blades, and hydrostatic transmission kits.

Whether you’re in search of a specific part or looking to understand your mower better, this guide has you covered.

Kubota ZD28 Parts Diagram

Before delving into the specifics of Kubota ZD28 parts, it’s essential to have a visual reference to understand the layout and components of your mower. The Kubota ZD28 parts diagram is a valuable resource for owners and mechanics alike. This detailed illustration displays the mower’s various components and their interactions, making it easier to identify and replace specific parts.

Kubota ZD28 Parts Manual PDF

For more in-depth information on maintaining and servicing your Kubota ZD28, a parts manual is indispensable. Fortunately, you can find the Kubota ZD28 parts manual in PDF format, which provides detailed instructions on identifying, ordering, and replacing parts.

This digital resource is easily accessible and can be a lifesaver when you need to keep your mower in tip-top shape.

Here is a breakdown of the sections you might find in a typical Kubota ZD28 Parts Manual PDF:

  1. Introduction
    • A brief overview of the Kubota ZD28 mower.
    • The purpose and importance of the parts manual.
  2. Safety Precautions
    • Information on safety measures and precautions to be followed when working with the mower’s parts.
    • Guidelines for personal protective equipment (PPE).
  3. Identification of Parts
    • Detailed diagrams and descriptions of all the major components and parts of the Kubota ZD28 mower.
    • Part numbers and reference numbers for easy identification.
  4. Parts List
    • An itemized list of all the parts, sub-assemblies, and components of the mower.
    • Part numbers, descriptions, and quantities included.
  5. Maintenance Procedures
    • Step-by-step instructions on how to perform routine maintenance tasks on the mower.
    • Lubrication points and recommended intervals for maintenance.
  6. Troubleshooting
    • Common issues, problems, and their potential causes.
    • Diagnostic procedures to identify and address problems.
  7. Removal and Replacement
    • Guidelines on how to remove and replace specific parts or components.
    • Assembly and disassembly instructions.
  8. Lubrication and Fluid Types
    • Recommended lubricants and fluids for different parts of the mower.
    • Lubrication schedules and quantities.
  9. Torque Specifications
    • Detailed torque specifications for tightening bolts and nuts on various components.
    • Ensures proper assembly and prevents over-tightening or under-tightening.
  10. Wiring Diagrams
    • Electrical wiring diagrams for the mower’s electrical system.
    • Schematics, wire colors, and connector information.
  11. Parts Ordering Information
    • Instructions on how to order replacement parts, including contact information for Kubota dealers or authorized distributors.
    • Part numbers and descriptions for easy reference.
  12. Special Tools
    • A list of any specialized tools that may be required for certain maintenance or repair procedures.
    • Tool descriptions and usage.
  13. Service Intervals
    • A schedule outlining recommended service intervals for different parts and components.
    • Helps with proper maintenance planning.
  14. Warranty Information
    • Details about the warranty coverage for Kubota ZD28 parts and the mower as a whole.
    • Warranty terms and conditions.
  15. Index
    • An index to help users quickly locate specific information within the manual.
  16. Appendix
    • Any additional information, charts, or references that may be relevant to maintenance and repair.

Kubota ZD28 Parts List

To make your search for specific parts even more straightforward, Kubota offers a comprehensive ZD28 parts list. This list provides an itemized inventory of all the components that make up your mower.

From blades to filters, you’ll have a complete overview of everything you may need for maintenance and repairs.

The Kubota ZD28 parts list is a comprehensive list of all the parts that make up the mower. It includes part numbers, descriptions, and quantities.

The parts list is available online and can be accessed through various websites, including Jacks Small Engines, Madison Tractor Company, German-Bliss and Coleman Equipment.

The parts list is an essential tool for anyone who wants to order parts for their Kubota ZD28 mower.

Where to Find Kubota ZD28 Parts

You can find Kubota ZD28 parts at a variety of places, including:

  • Local Kubota dealers
  • Online retailers
  • Salvage yards
  • Private sellers

Kubota ZD28 specs

The Kubota ZD28 is a commercial-grade zero-turn mower known for its durability and performance. Below are some typical specifications for the Kubota ZD28:


  • Engine Type: Diesel
  • Engine Model: Kubota D1105
  • Displacement: 1.123 liters (68.5 cubic inches)
  • Horsepower: Approximately 28 horsepower
  • Cooling System: Liquid-cooled
  • Air Cleaner: Dual-stage, dry element

Fuel System:

  • Fuel Type: Diesel
  • Fuel Tank Capacity: Approximately 7.9 gallons (30 liters)
  • Fuel Filter: Replaceable, in-line type


  • Transmission Type: Hydrostatic, dual pump system
  • Speed Range: Forward: 0-10.6 mph (0-17.1 km/h), Reverse: 0-5.3 mph (0-8.5 km/h)
  • Steering System: Twin-lever, ultra-smooth steering
  • Braking System: Dynamic braking

Mower Deck:

  • Mower Deck Type: Side discharge
  • Mower Deck Sizes: Available in various sizes (e.g., 54-inch, 60-inch, 72-inch)
  • Cutting Height: Adjustable in 1/4-inch increments, typically from 1 inch to 5 inches
  • Blade Type: Rotary, typically with three blades
  • Deck Lift Mechanism: Hydraulic
  • Deck Adjustment: Easy, dial-type adjustment


  • Overall Length: Approximately 79.5 inches (202 cm)
  • Overall Width: Varies depending on deck size
  • Overall Height: Varies depending on seat position and roll bar (if equipped)
  • Wheelbase: Approximately 49 inches (125 cm)
  • Weight: Varies depending on configuration (with or without roll bar, deck size, etc.)


  • Front Tires: Pneumatic, typically 13×6.5-6
  • Rear Tires: Pneumatic, typically 24×12-12

Other Features:

  • Roll Bar: Optional, depending on the model
  • Suspension Seat: Typically equipped with a high-back, adjustable suspension seat for operator comfort
  • ROPS (Roll Over Protection System): Available for enhanced operator safety
  • PTO (Power Take-Off): Independent PTO for engaging the mower deck

Hydraulic System:

  • Hydraulic Capacity: Varies depending on the model
  • Hydraulic Control: Twin-lever joystick control

Additional Information:

  • The Kubota ZD28 is designed for professional use, such as lawn care and landscaping.
  • It offers excellent maneuverability and zero-turn capabilities, making it ideal for mowing around obstacles and in tight spaces.
  • Kubota ZD28 mowers are known for their quality and reliability, with a strong reputation in the industry.

Please note that specific specifications may vary depending on the model year and optional features selected. It’s essential to consult the user manual or contact a Kubota dealer for the most accurate and up-to-date information on a particular Kubota ZD28 mower model.

Kubota ZD28 Mower Deck Parts Diagram

One of the most critical components of your Kubota ZD28 is the mower deck. A detailed mower deck parts diagram helps you understand how the cutting system works and enables you to identify and replace any worn or damaged components. A well-maintained mower deck is essential for a clean and efficient cut, so keeping it in excellent condition is vital.

Kubota ZD28 Deck Parts

The mower deck is composed of several parts, including blades, belts, and spindles. Kubota ZD28 deck parts are readily available, ensuring that you can maintain and repair your mower deck without any hassle. Whether you need to replace a worn-out spindle or install new belts for optimal cutting performance, Kubota has you covered.

Kubota ZD28 Parts Stream

For those who prefer a seamless shopping experience, the Kubota ZD28 parts stream is an efficient way to obtain the necessary components. This service allows you to order parts directly from Kubota or authorized dealers, ensuring the authenticity and quality of the parts you receive. Additionally, it simplifies the process of finding the right parts for your ZD28.

Kubota ZD28 Used Parts

If you’re looking for budget-friendly options or rare components, you may consider purchasing used Kubota ZD28 parts. Used parts can be a cost-effective alternative, especially for older models. Be sure to research the condition of the parts and their compatibility with your specific ZD28 model to ensure a successful replacement.

Kubota ZD28 Oil Filter

Proper maintenance of the engine is crucial for the longevity and performance of your Kubota ZD28 mower. The oil filter plays a vital role in keeping the engine clean and free of contaminants. Regular oil and oil filter changes are essential to prevent engine damage and ensure smooth operation. Be sure to choose the correct Kubota ZD28 oil filter based on your mower’s specifications.

Kubota ZD28 Hydro Problems

Hydrostatic transmissions are a key feature of the Kubota ZD28, providing smooth and precise control of the mower’s speed. However, like any mechanical component, they can experience issues over time.

Common Kubota ZD28 hydro problems may include fluid leaks, loss of power, or erratic operation. It’s essential to diagnose and address these problems promptly to avoid more extensive damage.

Troubleshooting hydrostatic (hydro) problems on a Kubota ZD28 mower can be challenging, but it’s essential to identify and address issues promptly to prevent further damage and maintain the mower’s performance.

Here’s a step-by-step guide to help you troubleshoot common hydro problems on a Kubota ZD28:

  1. Safety Precautions:
    • Ensure the mower is turned off, and the engine is cool before starting any troubleshooting.
    • Chock the wheels and engage the parking brake to prevent unintended movement.
  2. Inspect for External Leaks:
    • Check for any visible signs of hydraulic fluid leaks around hoses, fittings, and components. Leaks can cause a loss of fluid pressure.
  3. Check the Fluid Level:
    • Locate the hydrostatic fluid reservoir (usually near the transmission).
    • Check the fluid level and make sure it is within the recommended range. Low fluid levels can lead to poor hydrostatic system performance.
  4. Fluid Quality:
    • Inspect the condition of the hydraulic fluid. It should be clean and free of debris. If the fluid appears dirty or contaminated, it may need to be changed.
  5. Fluid Filter:
    • Check the condition of the hydraulic fluid filter. If it’s clogged or dirty, replace it as a dirty filter can restrict fluid flow.
  6. Belt Inspection:
    • Ensure the drive belts are in good condition and properly tensioned. Loose or damaged belts can lead to reduced speed and power.
  7. Drive System Check:
    • Confirm that both drive wheels are engaging and disengaging as they should. If one side is not operating correctly, it can cause uneven or erratic movement.
  8. Check for Air in the System:
    • Air bubbles in the hydraulic system can disrupt proper fluid flow. Bleeding the system may be necessary to remove air. Consult the service manual for the proper procedure.
  9. Inspect the Hydrostatic Pump and Motor:
    • The hydrostatic system typically consists of a pump and a motor. Inspect these components for signs of wear, damage, or leaks. Ensure the bolts and connections are tight.
  10. Test the Control Linkage:
    • Verify that the control linkage, which includes linkages and link arms, is properly connected and adjusted. Misalignment can affect control and performance.
  11. Test for Proper Fluid Flow:
    • Lift the rear wheels off the ground and start the engine.
    • Engage the hydrostatic drive and check if the wheels are turning. If not, it could indicate a problem with the hydrostatic pump or motor.
  12. Consult the Service Manual:
    • The Kubota ZD28 service manual contains specific troubleshooting and diagnostic procedures for the hydrostatic system. Refer to this manual for more detailed guidance.
  13. Seek Professional Assistance:
    • If you are unable to diagnose or resolve the issue after performing the above steps, it is advisable to contact a qualified Kubota technician or dealer who has the expertise and tools to diagnose and repair hydro problems effectively.

Kubota ZD28 Transmission Rebuild Kit

When your hydrostatic transmission experiences significant issues, a transmission rebuild kit can often provide a cost-effective solution.

hese kits include essential components such as seals, gaskets, and bearings, allowing you to refurbish your transmission without the need for a complete replacement.

A Kubota ZD28 transmission rebuild kit can extend the life of your mower and save you money.

A Kubota ZD28 transmission rebuild kit typically includes a set of components and parts needed to refurbish or repair the hydrostatic transmission system on your Kubota ZD28 mower.

These kits are designed to restore the transmission’s functionality, address wear and tear, and prevent further issues.

The specific contents of a transmission rebuild kit may vary depending on the manufacturer, but here’s a general list of components you might find in such a kit:

  1. Seals and Gaskets: These are essential for preventing fluid leaks and maintaining proper hydraulic pressure in the transmission.
  2. O-rings: O-rings are used to seal hydraulic connections and prevent fluid leakage.
  3. Bearings: Bearings may be included to replace worn or damaged components within the transmission system.
  4. Sealing Rings: Sealing rings help maintain the integrity of hydraulic circuits within the transmission.
  5. Piston Rings: These are used in the transmission’s hydraulic pistons to ensure proper sealing and operation.
  6. Pump and Motor Components: Rebuild kits may include replacement parts for the hydrostatic pump and motor, such as pistons, cylinders, and valves.
  7. Filters: Some kits include new hydraulic fluid filters to ensure clean fluid circulation within the transmission.
  8. OEM Lubricants: Some kits may include the appropriate hydraulic fluid or lubricants recommended by Kubota for the transmission.
  9. Instructions or Service Manual: Rebuild kits may come with detailed instructions or a service manual to guide you through the rebuild process.

It’s important to note that the exact contents of a Kubota ZD28 transmission rebuild kit may vary depending on the supplier or manufacturer, and it’s crucial to ensure that the kit you purchase is suitable for your specific ZD28 model.

Additionally, if you’re not experienced in transmission rebuilding, it’s highly recommended to seek professional assistance or consult with a qualified technician to ensure the correct installation and operation of the components in the kit.

Kubota ZD28 Hydrostatic Transmission

The hydrostatic transmission in the Kubota ZD28 is a hydraulic system that eliminates the need for manual shifting and provides a smoother ride.

It’s essential to understand the functioning of this transmission and how to maintain it properly to avoid issues. Regular fluid checks, filter changes, and occasional servicing are crucial to keep the hydrostatic transmission operating at its best.

Kubota ZD28 Battery Size

The battery in your Kubota ZD28 provides the necessary power to start the engine and operate various electrical components.

To ensure that your mower starts reliably, it’s essential to choose the correct battery size. Refer to your ZD28 parts manual or consult with a Kubota dealer to determine the appropriate battery size for your specific model.

The Kubota ZD28 uses a 12-volt, 24-amp battery. You can find this battery at your local Kubota dealer or online.

Kubota ZD28 Mower Blades

The quality and sharpness of your mower blades significantly impact the quality of the cut your Kubota ZD28 delivers. Dull or damaged blades can lead to uneven cutting and leave your lawn looking less than pristine.

Kubota ZD28 mower blades are available in various designs and materials to suit different cutting conditions. Regular blade maintenance and replacement are essential for optimal mowing results.

The Kubota ZD28 uses two 20 1/2-inch mower blades. You can find replacement blades at your local Kubota dealer or online.

Kubota ZD28 Gearbox

The gearbox in your Kubota ZD28 is responsible for transmitting power from the engine to the mower deck’s cutting blades. It’s a critical component that requires regular maintenance to ensure proper operation.

Lubrication, alignment, and periodic inspections are necessary to keep the gearbox in good working condition. If you encounter any issues, consult the parts manual for guidance on gearbox replacement or repair.

Kubota ZD28 Fuel Pump

The fuel pump in your Kubota ZD28 ensures a consistent and reliable supply of fuel to the engine. If you experience engine starting problems or stalling, a malfunctioning fuel pump could be the culprit.

Kubota ZD28 fuel pumps are available for replacement, and it’s important to choose the correct one based on your mower’s specifications.

What are the most common parts that need to be replaced on a Kubota zd28

Like all machinery, Kubota ZD28 mowers may require periodic maintenance and parts replacement to ensure their continued performance and longevity.

The specific parts that need replacement can vary depending on factors such as usage, maintenance practices, and environmental conditions. However, here are some of the most common parts that may need replacement over time:

  1. Mower Blades: Mower blades are subject to wear and tear due to cutting grass and coming into contact with obstacles. It’s common to replace blades when they become dull or damaged to maintain a clean and even cut.
  2. Filters: Regularly changing the oil filter, fuel filter, and air filter is essential for engine health. Filters can become clogged over time, affecting engine performance and efficiency.
  3. Belts: The drive and deck belts on the mower may wear out and become brittle over time. Regular inspection and replacement of these belts are essential to maintain proper power transmission and cutting efficiency.
  4. Spindles: Mower deck spindles can become damaged or seize over time. Replacing spindles may be necessary to ensure the mower deck’s smooth operation.
  5. Tires: Over time, the tires on a Kubota ZD28 may wear down or become damaged. Replacing tires is crucial for maintaining traction and maneuverability.
  6. Batteries: Mower batteries have a finite lifespan, and they may need replacement when they no longer hold a charge or exhibit signs of deterioration.
  7. Hydraulic Hoses and Fittings: The hydraulic system may develop leaks or require maintenance. Replacing hoses, fittings, or seals can prevent hydraulic issues.
  8. Hydrostatic Transmission Components: The hydrostatic transmission system is critical for the mower’s operation. Components such as pumps, motors, and filters may require replacement if issues arise.
  9. Electrical Components: Wiring, switches, and electrical connections can degrade over time. Replacing worn or damaged electrical components is essential for proper operation and safety.
  10. Spark Plugs: Regular replacement of spark plugs ensures proper combustion and engine performance.
  11. Fuel Injectors: If the mower’s fuel system develops issues, fuel injectors may need cleaning or replacement to maintain fuel delivery efficiency.
  12. Gaskets and Seals: Over time, gaskets and seals in various parts of the mower, such as the engine or transmission, may degrade and require replacement to prevent leaks.
  13. Deck Wheels and Rollers: The deck wheels and rollers help maintain proper deck height and reduce scalping. They may need replacement if worn or damaged.
  14. Bearings: Bearings in the mower’s various components can wear out and require replacement to prevent friction and overheating.

Regular maintenance and adherence to the manufacturer’s recommended service intervals are key to extending the lifespan of your Kubota ZD28 and minimizing the need for frequent part replacements.

Additionally, keeping an eye out for signs of wear and addressing them promptly can help prevent more significant issues and costly repairs.

Consult the Kubota ZD28 parts manual and the guidance of a qualified technician when addressing any part replacements or repairs.

How to change the deck belt on a Kubota zd28 zero turn mower

Changing the deck belt on a Kubota ZD28 zero-turn mower is a relatively straightforward process, but it’s essential to follow the correct steps to ensure a successful replacement. Here’s a step-by-step guide on how to change the deck belt on your Kubota ZD28:

Safety Precautions: Before you begin, make sure to take proper safety precautions:

  • Turn off the mower’s engine and remove the key.
  • Disconnect the spark plug wires to prevent accidental starts.
  • Chock the wheels and engage the parking brake to prevent movement.
  • Allow the engine and components to cool down if they’ve been running.

Tools and Materials: You’ll need the following tools and materials for this task:

  • A new deck belt (make sure it matches your mower’s specific model).
  • Socket set or wrenches.
  • Safety goggles.
  • Work gloves.

Step-by-Step Guide:

  1. Position the Mower:
    • Park the mower on a flat, level surface.
    • Ensure it’s stable and won’t roll.
  2. Lower the Mower Deck:
    • Lower the mower deck to its lowest cutting height position using the deck height adjustment lever.
  3. Locate the Belt Tension Lever:
    • Under the mower deck, locate the belt tension lever. This lever is used to release tension on the old belt.
  4. Release Tension on the Old Belt:
    • Pull the belt tension lever to release tension on the old belt. This will make it easier to remove the belt from the pulleys.
  5. Remove the Old Belt:
    • Slide the old belt off the pulleys while keeping the belt tension lever pulled.
    • Carefully remove the old belt from the mower.
  6. Install the New Belt:
    • Position the new deck belt onto the mower deck, ensuring it’s properly aligned with the pulleys.
    • Re-engage the belt tension lever to apply tension to the new belt.
  7. Check Belt Alignment:
    • Make sure the new belt is properly seated in the pulley grooves and aligned correctly.
  8. Inspect the Belt Path:
    • Double-check that the belt is correctly threaded through all the necessary guides and around the pulleys.
  9. Test the Mower Deck:
    • Engage and disengage the mower deck to ensure the belt is properly connected and functioning.
  10. Raise the Mower Deck:
    • Raise the mower deck to your desired cutting height.
  11. Reconnect Spark Plug Wires:
    • Reconnect the spark plug wires.
  12. Start the Mower:
    • Start the mower and engage the mower deck to verify that the new belt is functioning correctly.

Changing the deck belt on your Kubota ZD28 zero-turn mower is an important part of routine maintenance to ensure the mower’s optimal cutting performance.

If you encounter any difficulties or are unsure about any step in the process, consult your Kubota ZD28’s manual or seek the guidance of a qualified technician for assistance.

Kubota ZD28 common problems

Kubota ZD28 zero-turn mowers are known for their durability and performance, but like any piece of machinery, they can experience common problems over time. Here are some of the common issues that owners of Kubota ZD28 mowers may encounter:

  1. Hydrostatic Transmission Problems:
    • Issues with the hydrostatic transmission, such as fluid leaks, loss of power, or erratic operation, can occur. Proper maintenance and timely repairs are crucial to address these problems.
  2. Belt Wear and Breakage:
    • Drive belts and deck belts can wear out or break, affecting the mower’s power transmission and cutting performance.
  3. Mower Deck Issues:
    • The mower deck may experience problems, including spindle wear, damaged blades, or uneven cutting. Regular maintenance and blade replacement are essential to prevent these issues.
  4. Engine Problems:
    • Engine-related problems, such as hard starting, stalling, or loss of power, may occur due to issues with fuel delivery, spark plugs, air filters, or the cooling system.
  5. Electrical System Concerns:
    • Electrical issues like malfunctioning safety switches, wiring problems, or a dead battery can lead to starting and operation problems.
  6. Hydraulic Hose Leaks:
    • Hydraulic hoses can develop leaks over time, leading to loss of hydraulic fluid and reduced system performance.
  7. Tire Damage:
    • Wear and damage to the tires can affect the mower’s stability and maneuverability. Replacing damaged tires is essential.
  8. Steering and Control Linkage Problems:
    • The steering system and control linkages may become misaligned or worn out, leading to difficulties in steering and control.
  9. Fuel System Issues:
    • Problems with the fuel system, such as clogged fuel filters or a malfunctioning fuel pump, can cause engine performance problems.
  10. Spindle and Bearing Wear:
    • Spindles and bearings in the mower deck can wear out or seize, leading to reduced cutting efficiency and uneven grass cutting.
  11. Cooling System Problems:
    • Issues with the cooling system, such as clogged radiators or malfunctioning cooling fans, can result in overheating and engine damage.
  12. Oil Leaks:
    • Leaks in the engine or hydraulic oil systems can lead to a loss of fluids and potentially damage components.
  13. Excessive Vibration:
    • Excessive vibration during operation may indicate unbalanced blades, worn pulleys, or other issues with the deck.

Here are some tips to help prevent common problems with your Kubota ZD28:

  • Perform regular maintenance: Follow the maintenance schedule in your owner’s manual to keep your Kubota ZD28 in good condition. This includes changing the oil, filter, and fluids regularly, and cleaning the mower deck and air filter.
  • Use high-quality parts: When you need to replace parts on your Kubota ZD28, use high-quality OEM parts. OEM parts are designed to fit and work properly with your mower.
  • Avoid overworking your mower: Don’t try to mow too much grass at once, and avoid mowing in tall grass. Overworking your mower can put stress on the engine and transmission.
  • Have your mower serviced by a qualified technician: Take your Kubota ZD28 to a qualified technician for regular service and repairs. This will help to identify and fix problems before they become serious.


Maintaining and repairing your Kubota ZD28 is made easier with a comprehensive understanding of its various parts and components.

Whether you’re in need of a parts manual, specific components like mower blades, or are troubleshooting issues with the hydrostatic transmission, this guide has covered the essential aspects of Kubota ZD28 parts.

By staying informed and proactive with your maintenance and repairs, you can ensure that your Kubota ZD28 continues to deliver exceptional performance for years to come.