How To Stabilize A Treadmill From Jerking

How Do I Stop My Treadmill From Jerking 

How Do I Stop My Treadmill From Jerking Despite all movements on the belt, the machine should not move, swing or jerk. If the treadmill develops a slipping training, the grip may be too loose, or the belt may not be properly centered. If any of these things happen, the running belt is uneven and unbalanced. When you get off the treadmill and lift the deck’s belt, the free space should be about 7 to 10 cm.

Treadmill Jerking means that there can be a lot of space, and the belt will slip. Tighten the belt using the Allen key provided with the belt at the time of purchase. If it is too tight, loosen it also using the Hex wrench. With a quick and easy process, it is possible to solve jerking problems, and below is a guide on how do I stabilize the treadmill from jerking.

Fix the running belt


You need to center the treadmill’s belt using the same Allen key to turn the roller screw clockwise. Let the belt turn by itself several times, and you will see if it rotates along the width without moving. If you can’t find an Allen key, buy one from a hardware store. Note that slippery floors can be the cause of the machine moves, even slightly.

Place the machine on a mat, and it should remain stable in one place. If the above problem persists or the treadmill moves violently, we recommend stopping using it and disconnecting it. Find the adjustment screws, usually located on the belt’s back, on both sides of the treadmill head. Set the treadmill to a slow speed of 2 or 3 miles per hour. The belt should move as you center the belt or adjust it to tighten.

How To Stop Treadmill From Jerking 

Find the right Allen keys for your treadmill, which usually comes together with the treadmill. However, if you lost them or bought a second treadmill, purchase different key combinations from a hardware store. Insert the Hex key into the screw on the belt’s right side and rotate it a quarter-turn clockwise.

You should see the belt tighten a little more when turning the key. Insert the Hex key into the left screw and turn a quarter turn clockwise. You should pull the belt clockwise if it is loose. Remember that some treadmills require a more flexible belt than others. So don’t be surprised if the belt is a little loose, even if you are not using it.

Walk on the treadmill for several minutes to see if it is still jerking. In that case, the jerking is still there; it may be necessary to tighten the two fixing screws to remove any loose running surfaces. If the belt seems to prefer one side, draw that side to see if you can realign the belt. One way to check if the belt is too loose is to disconnect the strap and lift the central belt, and you should manage to lift it 2-3 inches.

If you can lift it higher, the belt is too loose, and if you are unable to raise the belt even 5 cm, the belt is too tight and should come loose. You can loosen it by rotating the belt adjustment screws a quarter turn counter-clockwise. Call a professional to find out what happens if you try everything without success or contact the customer.

Adjust the motor drive belt

The motor drive belt is a primary culprit to a jerking treadmill, and here is the guide to secure it if it always swings and slides when moving. Turn off the device and remove the motor cover by loosening the screws that hold it in place. Sometimes you have to turn the tape to the side to be able to remove the cover.

How To Stabilize A Treadmill From Jerking

After removing the cover, look for the black rubber parts that indicate that the motor belt is slippery or worn. If the engine belt damage is immense, it may be necessary to buy a new one. Loosen the screws that hold the motor in place. With a loose motor, tighten the engine drive belt by yourself or with someone else.

Now tighten the engine and make sure that it is tight, and carefully inspect the transmission belt. Connect the treadmill, start it slowly while no one walks on it at 1 or 2 mph, and gradually increase it to about six mph. If everything seems to be working well, stop the treadmill and reconnect it at a speed of approximately six mph. This time, you are ready for a full test by continuing at higher rates to ensure that the belt works correctly without jerking.


In conclusion, most top treadmills have changeable rear leveling feet. Adjusting the hind legs can help if the treadmill location is uneven, but it may not fully level out the rough surfaces. Rough tracks can cause belt misalignment, irregular belt wear, and possible injury to the user. Most importantly, belts that are not on a flat surface tend to shake. A jerking treadmill is scary and can potentially lead to injury or further treadmill damage. Remember to follow the manufacturer’s user manual when stabilizing a treadmill from jerking.


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