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How to Replace Your Treadmill Walking Belt and Deck 101: A Comprehensive Guide

Replacing Treadmill walking belt

How to replace your treadmill walking belt and deck. Treadmills are a staple in many home gyms and fitness centers. They offer a convenient way to stay fit and healthy, regardless of the weather outside. However, like any piece of machinery, treadmills require regular maintenance to ensure they continue to function optimally. One of the most common maintenance tasks is replacing the walking belt and deck. This article will guide you through the process of treadmill walk belt and deck replacement, highlighting the signs that indicate a need for replacement, the tools required, and the steps to follow.

Recognizing the Signs of Wear and Tear

Before we delve into how to replace your treadmill walking belt and deck, it’s crucial to understand when a replacement is necessary. Here are some signs that your treadmill belt and deck may need replacing:

  • Slippage: If your treadmill belt slips or jerks while you’re using it, this could be a sign that it’s worn out and needs replacing.
  • Lack of Lubrication:
    Residential Treadmill: A well-maintained treadmill belt should be lubricated regularly. If it’s dry or the lubrication isn’t lasting as long as it used to, it might be time for a new belt.
    Commercial Treadmill: It usually does not require lubrication. Contact your manufacturer’s tech support if you have questions.
  • Smoothness: Run your hand along the surface of the belt. If it feels smooth or worn, it’s likely time for a replacement.
  • Visual Damage: Look for visible signs of wear and tear, such as fraying, tears, or discoloration.
damaged treadmill deck

Tools Required to Replace Your Treadmill Walking Belt and Deck

Before you start the replacement process, gather the necessary tools. These may vary depending on your treadmill model, but typically include:

  • Allen Wrench
  • Phillips Screwdriver
  • Box Wrench
  • Pliers

Replacing the Treadmill Walking Belt

Step 1: Disconnect the Treadmill

For safety reasons, always start by disconnecting the treadmill from the power source. This prevents any accidental starts while you’re working on it.

Step 2: Remove the Motor Hood

When removing the motor hood be very careful not to damage exposed wires and circuit boards.

Step 3: Mark the Roller Position

Using your marker or felt tip, mark the position of the front and back rollers. This will help you realign everything correctly when you install the new belt.

Step 4: Loosen the Walking Belt

Next, you’ll need to loosen the walking belt. This is typically done by adjusting the rear roller bolts.

Step 5: Remove the Deck Bolts

Locate the bolts attached to the underside of the treadmill on the deck. Remove these bolts to free the deck and belt. You may have to remove the side rail covers first, depending on your model treadmill.

Step 6: Remove the Rear Roller

With the deck bolts removed, you can now take out the rear roller. This will allow you to remove the old belt.

Step 7: Replace the Running Belt

Slide the new belt over the deck, ensuring it’s centered. Then, replace the rear roller, aligning it with the marks you made earlier. If you are installing a residential treadmill you will need treadmill belt lubricant.

If the deck has grooves from excessive wear or damage such as a crack, replace the deck at this time.

Step 8: Tighten the Belt

Once the new belt is in place, you’ll need to tighten it. This is done by adjusting the rear roller bolts. See our article on adjusting a treadmill walk belt. Treadmill belt slipping is dangerous. This is an important step.

Step 9: Check the Belt

After tightening, check the belt to ensure it’s centered and not too tight or too loose. Make any necessary adjustments.

Step 10: Test the Treadmill

Finally, reconnect the treadmill to the power source and test it at a slow speed. Check for any slippage or misalignment and adjust as necessary.


Replacing your treadmill walking belt and deck is a crucial part of maintaining your fitness equipment. By recognizing the signs of wear and tear and knowing how to replace these parts, you can extend the lifespan of your treadmill and ensure a safe and effective workout. Remember, always consult your treadmill’s user manual or a professional if you’re unsure about any part of the process.