How to Adjust, Clean, Lubricate or Replace Treadmill Belt? A Step-By-Step Guide

    How to Adjust, Clean, Lubricate or Replace Treadmill Belt? A Step-By-Step Guide

    Purchasing a treadmill is a worthwhile long term investment for your health and fitness. Treadmills are expensive. Therefore, you need to take proper care and conduct maintainace routine.

    Proper maintainace of your treadmill includes regular cleaning of the parts, adjusting and aligning the belt, lubricating after every three months and replacing the belt after wearing off.

    In this article, you will learn step by step of adjusting, cleaning, lubricating, and replacing the treadmill belt, to keep it in good working condition all the time.

    How to Adjust Treadmill Belt?

    If your treadmill does not function as it should even though you just replaced it, it probably need adjustment. If you feel that the treadmill belt is not functioning as it should, cease using it and troubleshoot. However, you can adjust the belt while the treadmill is off or on.

    Here is a guide on how to adjust your treadmill belt:

    1. Adjusting the Belt while on the treadmill and while off.
    • Identify the screws on the side of the belt that require adjustment.
    • Turn on the treadmill at a 3 miles speed
    • Adjust the screws accordingly. For instance, if you want to make the belt loose, adjust the screw clockwise. If you need to make the belt tighter, adjust the screw anticlockwise. Remember to adjust all the screws the same number of times. If you want to adjust the belt to the right, adjust the screws on the right. And if you are adjusting the belt towards the left, fix the screws on the left.
    • Keep on adjusting the belt until it stops slipping and it is well aligned at the center.
    1. Adjusting the Belt When Its Off
    • Switch off the machine and unplug it from the power source
    • Identify the screws you need to adjust the belt. For most treadmills, they are located towards the rear close to the roller axle.
    • Adjust the screws accordingly by either tightening or loosening them. Only adjust the screw not more than a quarter turn every time.
    • Turn every screw the same number of times.
    • If you need to center the belt towards the right, adjust the right side screws.
    • If you want to center the belts towards the left adjust the left screws
    • Turn on the treadmill and check the status of the belt. Keep on adjusting until it is well aligned.

    How to Clean Treadmill Belt?

    Good maintainace of your treadmill is key if you want it to serve you for long. You need to clean your treadmill regularly to keep it from developing mechanical problems due to clogging of moving parts by dirt. Here is a detailed guide for cleaning your treadmill.

    1.The first step is to unplug the treadmill from the power outlet.

    1. Wipe off the dust from the belt using an anti-static duster. Also, wipe off the dust in all accessible areas of the machine all round and underneath the belt.

    3.Use a damp piece of cloth to wipe off the belt. However, do not allow the water to touch the belt. Rotate the belt, to ensure you have wiped cleaned all the belt all round.

    4.Dry the belt using a paper towel as you rotate the belt to ensure the its all dry.

    1. The items you will need for cleaning the treadmill belt are: anti-static duster, lint-free cloth, and paper towels. To keep the treadmill from accumulating much dust and dirt, use a clean pair of shoes when running or walking on the treadmill.

    How to Lubricate a Treadmill Belt?

    How often should you lubricate your treadmill? You should lubricate your treadmill at least every 3 months or after every 150 miles. Regular lubrication keeps your treadmill in good condition and functioning as it should. Additionally, lubrication prevents the motor from overworking. Friction and overheating causes deck to break and shortens the life of the treadmills parts.

    Also, lubrication prolongs the wear and tear of the moving parts, so you do not have to replace them so often. If you forget to lubricate the belt, the treadmill will indicate on the display screen ‘Lube Belt’

    To lubricate your treadmill, the tools you need are:

    • 100% Silicone oil
    • An Allen Wrench or a Blue-handled T-wrench

    Steps for lubricating the treadmill

    1.Turn off the treadmill and unplug it from the power outlet.

    2.Use the Allen Wrench or the T-wrench to unscrew the rear roller bolts. Do approximately 10-15 counter clockwise turns. These number of turns are enough to make the belt loose enough.

    3.Lift the belt as high as you can. This allows you to spread the silicone oil lubricant all over the running surface. Do not apply the silicone oil on the belt. You will need about half a bottle for the running surface. Once you are done, place the belt down and tighten the two rear roller bolts in a clockwise the similar number of times you used to loosen it.

    4.Once you are done applying the lubricant on the parts, plug the power cord into the outlet. Reset the lube belt settings by pressing and holding the speed-up belt button. Press the stop button and simultaneously press the two buttons for about 5 to 7 minutes.

    5. Press the start button. Let the belt run for about 3 to 5 minutes at 3 mph so that it can spread the lube evenly throughout the running surface. Get on the machine and run for about 3 minutes to allow the lubricant to spread well on the treadmill.

    6. While running on the treadmill, ensure the belt is perfectly aligned and there is proper tension.

    7. If the belt is running properly and is well aligned, you can press the stop button. Use a damp piece of cloth to wipe off any silicone oil spillages on the treadmill.

    How to Replace Treadmill Belt?

    After a prolonged use of the treadmill, the belt will wear out even after a series of repairs and maintenance. If the belt of your treadmill is no longer working, you can just replace the belt, rather than replacing the entire machine.

    Replacing the belt is easy and you can DIY without much trouble. In this guide, you will learn how to replace the belt of your treadmill, step by step.

    1.Remove the Old Belt

    Start by removing the old worn out belt.

    • Unplug the treadmill from the power outlet.
    • Unscrew the motor hood and open it.
    • Identify the front and rear roller bolt. Use a permanent marker to mark the rollers and their positions to avoid mixing the later.
    • Loosen the belt so that your hand can fit underneath
    • Then, remove the adjustment bolt on the front roller completely.
    • This step might differ depending with the model or brand of the treadmill. Some treadmills have straddle covers with under mount or side mount. Be gentle while removing them.
    • Separate the three or four deck from the treadmill. Then, remove the rear roller screws. Also, remove the plastic ends and the cap rollers.
    • If your treadmill has side handrails, remove them.
    • Now, remove the old belt. You will require help from another person.

    2.Install the New Treadmill Belt

    • Check the status of the deck before installing the new belt. Also, clean the rollers and remove any debris or dirt on it.
    • Have someone lift the deck and hold the front rollers as you slide in the new belt on the board.
    • After installing the belt, raise the deck to check the underneath if the belt well aligned at the center.
    • Place back the rollers and the end caps as well as the rear roller bolts. Don’t tighten them yet.
    • Once you have put in place the deck bolts, you can fasten them. Secure the front bolts too. Remember to fix them back to the place you had marked while removing the old belt.
    • Once you have fastened the bolts, you can start the treadmill slowly at 4 kph. Walk on the gently on the newly installed belt to test if its working properly. Ensure there is no slippage.
    • You can increase the speed as you continue to test it. If the treadmill is functioning as it should, place back the motor hood.
    • Finally, lubricate the belt using silicone lubricant. Run the treadmill to distribute the lubricant evenly on the board.


    Proper and regular maintainace of your treadmill keeps it good condition which makes it possible for it to serve you for a long time. Ensure the treadmill is properly aligned and fix it immediately if it is misaligned. It should not be too loose or too tight.

    Wipe of dust on the belt and the motor and keep the parts clean all the time. Dirt can clog the moving parts and interfere with its proper working condition.  Use a clean pair of shoes while using the treadmill.

    Also, remember to lubricate the running surface and other parts after three months. Lubrication prevents premature wearing and tearing of the parts. If the belt is worn out, replace it.