How To Remove Pulley From Mower Spindle

How To Remove Pulley From Mower Spindle?

Are you having trouble with your lawn mower? Perhaps you’re noticing a strange noise or vibration coming from the deck. The issue may lie with the pulley attached to the spindle. This small but vital component plays a crucial role in the proper function of your mower. And it’s essential to know how to remove it for maintenance or replacement purposes.

So, what’s the procedure on how to remove pulley from mower spindle? The procedure involves disconnecting the spark plug and removing the deck from the mower. Next, you will need to secure the spindle and remove the blade. Now finally, remove the pulley itself. 

If you want to learn the ropes, read on for a step-by-step guide to removing a pulley from your mower spindle.

An Overview of What you Will Need To Remove Pulley From Mower Spindle

If you’re looking to learn how to remove a pulley from a mower spindle, there are a few things you’ll need to have on hand. Here’s a table illustrating them and their purposes:

Socket wrenchRemove bolts holding the blade and pulley in place
Socket setProvides a variety of sizes to fit different bolt heads
JackLift the mower to a comfortable working height
RulerMeasure spindle length
Breaker barGives extra leverage for stubborn bolts
Torque wrenchUsed to tighten bolts to the correct specifications when reassembling the mower
Safety glassesProtects eyes from debris, or small parts that may fly off
Work glovesProtects hands from sharp edges and hot surfaces
Penetrating oilLoosens a stuck pulley on the spindle
Pulley puller (optional)Helps remove a stubborn pulley
Torch (optional)Used to heat the pulley or spindle to make it easier to remove

Step-by-Step Guide on How to Remove a Pulley from Mower Spindle

Follow the following steps to the latter:

Step 1: Disconnect the Spark Plug

The spark plug is located at the engine’s top and usually covered with a rubber cap. 

  1. Remove the cap
  2. Disconnect the spark plug
  3. Use a spark plug wrench to loosen the plug
  4. Once it’s loosened, you can remove it from the engine

This step is crucial because it prevents the engine from starting accidentally while you are working on it.

Step 2: Lift it Using a Jack

You need to ensure that your mower has the correct height if you will be accessing components located under the deck. This involves lifting the mower with a jack to access the spindle. 

  1. First, locate a flat and stable surface to place the jack
  2. Then, place the jack beneath the mower deck and slowly pump the jack handle to raise the mower off the ground
  3. Use a ruler to measure the height of the mower to ensure that it is lifted to the appropriate level

Step 3: Remove the Deck

To access the mower spindle, you will need to remove the mower deck from the lawn mower. You’ll need to use a socket wrench and socket set for this. 

  1. Locate the bolts holding the deck in place and loosen them with the socket wrench
  2. Once all the bolts have been loosened, carefully lower the deck to ground
  3. Be careful not to damage the blades or any other mower components
  4. Once the deck is removed, you can place it on a flat surface

Step 4: Remove the Covers

Once the mower deck is removed, you must remove the covers protecting the spindle. These covers can be located on the top and bottom of the spindle. 

Use a screwdriver to remove the screws holding the covers in place. Be careful not to damage the covers or the spindle while removing them.

Step 5: Remove the Belt Pulley

Locate the belt that drives it and carefully remove it from the pulley. Depending on your mower, you may need to release the tension on the belt to remove it. Refer to your owner’s manual for specific instructions.

Step 6: Secure the Spindle and Remove the Blade

Before you can remove the pulley from the spindle, secure it to prevent it from moving. 

  1. You can use a vice or clamps to hold the spindle securely
  2. Make sure that the spindle is level and straight to avoid damaging it
  3. You’ll also need to remove the blade
  4. To do this, use a socket wrench and socket set to remove the bolt holding the blade in place
  5. Once the bolt is removed, carefully lift the blade off the spindle and set it aside

Step 7: Remove the Pulley

Now that the belt pulley and blade are removed, you can remove the old pulley. Be careful not to injure yourself or damage other mower parts in the process.

Step 8: Inspect the Spindle and Pulley

After removing the pulley, inspect the spindle to ensure it is not damaged or worn. If there are any signs of wear or damage, the spindle may need to be replaced. 

Similarly, inspect the pulley to ensure it is in good condition and not damaged or worn. If the pulley is damaged or worn, it should also be replaced.

Step 9: Replace the Pulley

  1. Put in the new pulley, aligning it with the spindle correctly
  2. Use a torque wrench to tighten the bolt to the manufacturer’s specifications
  3. Next, replace the blade, aligning it correctly with the spindle
  4. Tighten the bolt using a torque wrench
  5. Finally, replace the deck and covers, aligning them correctly with the mower
  6. Tighten the bolts using the torque wrench

Step 10: Test the Mower

  1. With the mower reassembled, replace the spark plug
  2. Start the engine and test it to ensure everything is working correctly 
  3. Check that the blade is rotating smoothly and the deck is not vibrating excessively
  4. If you notice any issues, double-check the bolts to ensure they are tightened correctly

Watch this video to learn the process visually. 

Tips for Making the Process of Removing the Pulley Easier

Here are some tips for removing the pulley from your mower spindle easier:

Use a Penetrating Oil

If you’re having trouble removing the pulley, using a penetrating oil can help to loosen it. Penetrating oil is a type of lubricant that can penetrate deep into the threads and crevices of the pulley and spindle, making it easier to remove. 

You can also use a torch to heat the pulleys. They will expand due to the heat, making it easier to remove them.

Use a Pulley Removal Tool

If the pulley is stuck, you can use a pulley removal tool to make the job easier. A pulley removal tool is specialized to grip the pulley and allow you to apply more force to remove it. 

There are many different types of pulley removal tools available. Use the correct size tool for your specific mower spindle and pulley. You can also use a tight-spot pulley remover if it fits on your mower.

Clean the Spindle Before Reassembly

Over time, debris and rust can accumulate on the spindle. This can cause the pulley to wobble or become damaged. 

Use a wire brush or steel wool to remove any rust or debris that may have accumulated on the spindle. After cleaning the spindle, wipe it down with a clean, dry cloth to remove any remaining debris. This will ensure a secure fit and prevent wobbling or damage to the pulley.

Be Patient

Removing the pulley from a mower spindle can be challenging, especially if the pulley is stuck. Take your time, and don’t rush the process. Applying too much force or using the wrong tool can cause damage to the spindle or pulley. The result will be additional repairs.


The procedure on how to remove pulley from mower spindle might seem like a daunting task. However, it can be done quickly with the right tools and techniques. 

You only need to ensure you have the correct tools and follow the steps carefully. Remember to use caution when working with heavy machinery, and consult a professional if you need clarification on anything. With patience and the right approach, you can have your mower up and running again quickly.

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