How To Change A Lawn Mower Spindle

June 19, 2025

This guide aims to change a spindle assembly for lawn mower equipment quickly, so you can get back to your lawn and garden care.

Step 1 Remove the blade and fastener

Step 1: Remove the blade and fastener

Remove the blade (For safety, the deck drive belt is disconnected from the engine pulley and the blade is supported by a piece of wood when the fastener at the bottom of the spindle is loosened.)

Step 2 Remove the four damaged bolts

Step 2: Remove the four damaged bolts

At the top of the deck, the fasteners are removed from the belt cover. The belt is removed from the top of the spindle.

Step 3 Remove the damaged spindle assembly

Step 3: Remove the damaged spindle assembly

At the bottom of the deck, remove the 4 bolts that mount the spindle to the deck and the damaged spindle assembly.

Step 4 Replace the new spindle assembly

Step 4: Replace the new spindle assembly

Step 5 Tighten the four spindle assembly

Step 5: Tighten the four spindle assembly

Step 6 Mount the blade and fasteners, tighten bolts

Step 6: Mount the blade and fasteners, tighten bolts

Step 7 Mount the belt

Step 7: Mount the belt

 Note:

-Pulley nut must be tightened when fitting. Professional installation is highly recommended.

-If your mower blades produce weird grinding noises, have a hard time spinning or spin unevenly then you may have a problem with your spindle assembly.

-Please check OEM Part number and the size of your old spindle before purchasing, so as to prevent buying wrong and unnecessary expenses. 

Check out more helpful resource

How To Select The Right Spindle For Your Lawn Mower?

Guide to Lawn Mower Spindles


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