Lawnmower maintenance is key to ensuring your lawn mower runs smoothly and lasts for many years. Greasing the lawn mower spindle on your lawnmower is an integral part of this task. 

Every moving part of the lawnmower needs lubrication to function properly and prevent malfunction. Spindle refers to the rod on which the blades are attached, and it must be periodically lubricated so that it remains functional. 

Knowing how to grease lawn mower spindle correctly will prolong the life of the machine and make it easier to use. Without proper lubrication, the spindle will start to seize up, making it difficult for the blades to rotate. 

This can cause major damage to the mower and may even render it unusable. A seized spindle can be extremely detrimental, as the blades can become tangled and cause sustained destruction. We will outline the full process for you in detail.

How to Grease Lawn Mower Spindle : Step by Step Guide

Cub Cadet

Once you have determined that your spindle requires grease fitting, you should take action. The process of lubricating a spindle is relatively simple, and anyone can do it. You just need to follow the steps below:

Step 01: Collect the Necessary Supplies

It is very important to gather the required materials before starting a job. This is because, without the right supplies, the work will not be able to be completed properly and on time. For this task, you will need:

  • Grease gun with a cartridge
  • Wrench set
  • Screwdriver

Step 02: Park the Lawn Mower on a Level Surface

You should park your lawnmower on flat ground before starting to work. This will prevent the machine from tipping over and injuring you while you are working.

Step 03: Engage the Parking Brake

When performing maintenance on a lawnmower, there is always a risk that the machine will move and cause an accident. 

Despite having parked the zero-turn mower on level ground, it is still imperative that you activate the parking brake. 

This will ensure that the lawnmower does not move as you work on it. So, make sure to secure the parking brake before proceeding to the next step.

Step 04: Remove the Spark Plug

A spark plug is responsible for providing the spark needed to ignite the fuel inside a lawn mower’s engine. The spark plug is a small, threaded component that sits at the top of the cylinder. 

When the engine is turned over, the spark plug emits a spark that burns the fuel in the cylinder. The resultant combustion creates the force that powers the engine. So, prior to working on the lawn mower, it is essential that you disconnect the spark plug. 

Therefore, you will be able to work on the engine without the risk of it being turned on and injuring you. To remove it, use a wrench to loosen the nut that secures it in place. 

Once the nut is loose, you will be able to pull the spark plug out by hand. Place the spark plug in a safe place after it has been removed so that it will not be lost or damaged.

Step 05: Locate the Spindle

After you have removed the spark plug, you can proceed to locate the mower deck spindle. The spindle is located at the bottom of the mower deck. In order to access it, you will need to remove the mower deck. 

Using a wrench, loosen the bolts that secure it in place before removing the deck. Once the bolts are loose, it should be possible to lift the deck off of the mower.

Step 06: Prepare the Grease Gun

You need to gun with a soft and flexible hose that can reach the spindle. This will facilitate the process of applying the lubricant. 

Following the selection of the correct grease gun, the next step is to prepare it. To do this, it is necessary to insert the grease cartridge into the gun. 

First, unscrew the cover on the back of the gun. Then, take the grease cartridge and insert it into the opening. Once the cartridge is in place, screw the cover back on. Make sure that the cover is tight so that the grease does not leak out. 

Step 07: Apply Grease to the Spindle

Having successfully completed the above steps, you are now ready to begin the main task. Connect the grease gun to the spindle and pump the trigger until the grease begins to come out. 

Apply a generous amount of grease, making sure that it is evenly distributed. Once you have applied enough grease, release the trigger and disconnect the gun.

Step 08: Replace the Deck and Spark Plug

Once you have greased the spindle, you are ready to install the spark plug and deck. First, take the deck and place it back on the mower. Using a wrench, secure it in place by tightening the bolts.

Next, take the spark plug and place it in the cylinder. Once it is in place, tighten the nut with a wrench. Please ensure that the nut is securely fastened so that the spark plug does not come loose.

Step 09: Test the Lawn Mower

Let’s check the lawnmower to see if it is functioning properly. Disengage the parking brake and verify that the transmission is neutral. 

You should then turn on the engine and allow it to warm up for a few minutes. To test the functionality of the mower, mow a small section of the lawn after the engine has warmed up. If it is, then you have successfully completed the task.

Learn: How Do I Choose the Right Lawn Mower Oil Filter?

Tips for Keeping Your Lawn Mower in Good Condition

wheel bearing

A lawnmower is a big investment, and it’s important to keep it in good condition if you want it to last. Regular maintenance will not only extend the lifespan of your mower, but it will also ensure that it runs smoothly and efficiently. 

Maintaining your mower will also reduce the likelihood of it breaking down, saving you both time and money in the long run. Below are some tips that may prove useful to you.

Clean the Air Filter Regularly: A dirty air filter can cause the engine to run less efficiently. For cleaning the air filter, remove it and soak it in soapy water. Rinse it off and let it air dry before putting it back in place.

Change the Oil Routinely: Lubricating the engine makes it run smoothly. Most lawnmowers need their oil changed every 50 hours of use.

Sharpen the Blades: Sharp blades make for a better cut and help your lawn mower operate smoothly. You should sharpen the blades at least once per season.

Check the Tire Pressure: Low tire pressure can cause your lawnmower to perform poorly and even damage the turf. Check the tires before each use to make sure they are properly inflated.

You can follow the above simple steps to ensure that your lawnmower is functioning properly.

How to Know If Your Spindle Needs Grease?

There’s a spinning shaft that powers the blades of a lawnmower. With time, the spindle can become worn out, making it hard for the blades to turn.

Noise is a great way to tell if you need to grease your spindle. If the spindle makes more noise than usual, it may be due to lubrication.

It’s also possible to tell if a spindle requires lubrication by looking at the wear on the blades. If the blades are not rotating as smoothly as they used to, it may be because the spindle is not getting enough lubrication.

You can always consult your owner’s manual or take it to a professional for an inspection if you are not sure whether to lubricate the spindle.

Your spindle may need grease for a couple of reasons. Grease your spindle if you see any of these signs:

  • The blade isn’t spinning as fast as it used to
  • There is a wobble or vibration in the blade
  • A loud noise is coming from the lawnmower
  • You see metal shavings on the ground
  • The spindle is dry or rusty

How to Fix a Lawn Mower Spindle?

If the spindle becomes damaged, it can cause the blade to become misaligned and eventually cause the lawnmower to stop working altogether.

Luckily, you can follow a few simple steps to fix a damaged spindle.

  • Remove the damaged spindle from the lawnmower.
  • Use a file or sandpaper to smooth any rough edges on the spindle.
  • Reattach the spindle to the lawnmower, ensuring it is properly aligned with the blade.
  • Test the lawnmower to make certain that it is working correctly.

Lawn Mower Spindle Maintenance Tips

grease zerk

As any lawn care professional knows, a healthy lawn requires a carefully maintained lawnmower. 

The spindle is responsible for holding the blade in place, and if it is not properly cared for, it can cause damage to the blade and the lawnmower itself.

Here are a few suggestions for maintaining lawn mower spindles in top condition:

  • It is advisable to clean the spindles regularly with a soft cloth and soapy water. This will help remove any built-up grass or debris that could cause problems.
  • Lubricate the spindles with high-quality grease. As a result, you can keep them working smoothly and prevent them from becoming damaged or rusting.
  • Whenever you observe any damage to the spindles, such as bends or cracks, it is imperative that you replace them immediately. Damaged spindles can cause severe problems for your lawnmower and may even void your warranty.
  • Be careful not to hit the spindle with rocks or other objects

Some Common Problems With the Lawn Mower Spindle

It’s often the spindle that causes problems on lawnmowers. You might be wondering what could go wrong with the spindle on the lawn mower. Here are some common issues:

  • One common issue is that spindle parts are often bent, which prevents the blade from rotating properly
  • Another problem is that the sealed bearing inside the spindle can wear out, causing vibration and noise
  • And the spindle can also become corroded, which can make it difficult to remove the blade for sharpening or replacement.

While these issues can be frustrating, they can usually be resolved by taking the lawnmower to a repair shop.

Frequently Asked Questions:

There are a few questions that are often asked about greasing lawn mower spindles. Let’s take a look at some of the most common ones with their answers.

1. How to Tell If It’s Been Greased Properly?

If the spindle is properly greased, there should be a small amount of grease visible on the surface. In addition, the sound of the spindle should be smooth and quiet. You may hear an unusual noise when the spindle is not properly greased.

2. What Kind of Lubricant Should I Use to Grease the Lawn Mower Spindle?

Any kind of grease will work to lubricate the spindle on a lawnmower. We recommend using lithium-based greases because they do not degrade in high temperatures and they do not wash away easily.

3. How Often Should I Grease the Spindle?

It is generally recommended that you grease the spindle around once a month. However, this may vary depending on how often you use the lawnmower. When the spindle is making noise or there is insufficient grease on the surface, then it is likely time to grease it again.

4. What Should I Do If the Spindle Bearings Wear Out?

When you notice that the spindle bearings are beginning to wear out, you should replace them as soon as possible. 

Worn-out bearings can cause the mower to malfunction and may even lead to an accident. Replacing them is a relatively simple task that can be done with a few tools.

5. What Can I Do If My Spindle Is Corroded?

If the spindle is corroded, you will need to use a wire brush to remove the corrosion. Once the corrosion has been removed, you may proceed to grease the spindle as usual. Greasing will protect the spindle from further corrosion.


It is our hope that you fully understand the processes of how to grease lawn mower spindle. As you can see, it’s not a difficult task to accomplish. Simply follow the steps that we have provided, and you should be able to do it without any issues. 

Be sure to clean and lubricate the spindles regularly to keep them in top condition. If you notice any damage, be sure to replace the spindles immediately. This will help to prevent any accidents from happening.