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Treadmill noise -walk on right side belt doesn't make noise, but walk on left side, it makes a grating noise, looked under plastic sheet on top of the deck, right side is very clean, top and bottom sides, but on left side some dirt and dust visible on the underside, and the plastic sheet has bumps probably from the dirt(sand). the top side is clean on the left side

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  • stephfol Apr 28, 2009

    I have the same problem only now it's on both sides. It's a wining sound when you step on the belt. If you let the treadmill run on it's own, there is no sound.

  • Anonymous Mar 22, 2014

    when cold it starts on the left, after warm it ends up on the right



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If it is a chirping noise it will be the mylar sheet under your walking belt. You will need it replaced after that kind of damage. If it is an actual grinding noise it will be something else.

Posted on Apr 14, 2009

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The Mylar sheet is probably damaged if it is a whirring sound. The underside of the belt is a fabric and if you think of a continuous piece of corderoy rubbung when pressure is applied, this ma make some sense to you. You can look up "mylar treadmill" on ebay and come up with some suppliers. I got one for $25 + shipping. You will need to know what width it is, usually 17" or 19". You can use a yardstick of a tape measure and pull gently up on the belt and insert the measuring utensil under the belt. It will be narrower than the belt itself, so the measurement is not of the belt, but rather the thin plastic sheet under the belt.

Posted on Mar 05, 2010


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Hi Paula, I know nothing about it, you could lift the belt and use DW40 or vegi spray where it's squeaking. Nothing beats a walk in the park. Greg.

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How do you lube the deck belt

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Apr 16, 2014 | Reebok Exercise & Fitness

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Can the plastic sheet under the walking belt be purchased . My belt is making a "squealing" noise as it is rubbing off the plastic sheet,which has become "pitted" and worn,This plastic...

we named this sheet deck and it is not plastic but it is wood coated MDF you can measure it and buy any wood shop.
we would be glad help you by smartphon contact us 00989195116738

Sep 10, 2011 | Proform 790T Treadmill

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Making more noise when it is running. Did not make so much noise before.

If the noise is coming from the walking belt this could be due to sand or grit getting under it. These belts are big electro-magnetic generators. The attract sand and grit to them. Usually it will make a high pitched sound when there is sand under the belt, especially if there is a mylar or plastic sheet under it. If this is the case the sheet can easily be replaced.

Jun 15, 2010 | Proform 370E Treadmill Walking Belt

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I am having problem with the belt moving when i am trying to walk/run on treadmill

Normal 0 false false false MicrosoftInternetExplorer4 st1\:*{behavior:url(#ieooui) } /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-parent:""; mso-padding-alt:0in 5.4pt 0in 5.4pt; mso-para-margin:0in; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:10.0pt; font-family:"Times New Roman"; mso-ansi-language:#0400; mso-fareast-language:#0400; mso-bidi-language:#0400;} First, ensure that it is the walking belt that is loose. There is a belt hidden under the hood that connects the front roller to the motor (motor/drive belt). Start the treadmill at 3 or so and carefully apply pressure to the walking belt until it slips/stops. Watch the front roller. If it continues to spin when the walking belt stops, it’s the walking belt. It the front roller stops with the walking belt, the motor belt is loose and needs adjusted or replaced.

To adjust the walking belt, locate 2 hex head bolts, one on either side of the deck on the very back of the machine. These bolts will be recessed inside the plastic covers. Your treadmill came with a tool for this, but if you can’t find it, a standard (not metric) allen wrench kit will work. It’s helpful to have a wrench in each bolt so that you can adjust them at the same time, but one will work.

The allen bolts thread directly through each side of the rear roller. As you tighten the bolts, it pulls the rear roller away from the front roller, tightening the walking belt. This also centers it; if you tighten one bolt, it pushes the belt towards the center of the walking deck away from the bolt you’re tightening. So if the belt is too far to the right, tighten the right bolt and it will move towards the center.

Place your wrenches in the roller bolts and turn the machine on to 3-4 miles an hour. Keep your fingers clear of the belt, it will eat them. This method is quick, because you can see the belt move as you tighten one side or the other. It takes a few seconds, but if you tighten the right bolt for instance, you will see the belt move to the left. If the belt is loose but centered, tighten each bolt ½ turn and then get on the machine and see if it slips. The user manual will tell you to pull it up a couple of inches to test the tightness, which is a relative method and doesn’t necessarily work. My wife can pull on the belt and get 2 inches, and I can probably get 3 or even 4 if I’m showing off. The best way to test it is to gradually tighten it until you can run on it without it slipping.

You should lube the belt a couple of times a year. You can get them from

Good Luck!

Mar 04, 2010 | Proform 760 CrossTrainer Treadmill

1 Answer

Walking belt on image 10.0 tread mill slips, purchased it used, can see where it has rubbed to the left. How to adjust it?

There are adjustment screws on the very back of the deck… one on each side.

1. You will need a hex wrench that came with your unit (look on the side of the deck) sometimes it is attached to a bracket or look in your plastic bag with your instruction manual. If you cannot find it, do not worry, it is a common “hex” size. Purchase a "multi size” hex wrench at the hardware store"

2. Locate the screws on the back of the treadmill on the deck "where you walk" You will see one on each side.

3. With your wrench in hand, start your treadmill on a low speed and take note of which side the belt is "creeping" to the left or right.

4. If the belt is not centered and over to the left side take your tool and adjust the screw on the left side slowly a few turns until you notice the belt creeping back to the center....usually it does not take much adjustment.

5. Once you start getting the hang of what adjusting each particular screw does to the belt....You will be a pro in no time.

6. Once the belt centered, turn off the treadmill and unplug it. Take your hand and slide it under the belt about midway. The belt should feel "snug" against the deck. If it feels too loose...use your new found adjusting skills to tighten the belt adjusting each side a few turns…unplug…checking for tightness until you feel good about it.

7. Last suggestion: Some treadmills decks need lube to help it run smooth. Without it your deck will get worn and the belt will "stick" to the deck....not good. Buy the lube a sporting goods store or at a place that sells treadmills. If you cannot find any buy some spray on graphite.

Feb 25, 2010 | Exercise & Fitness

1 Answer

Instructions for changing the walking belt on my Cadence DX15 treadmill

1. Unplug the treadmill and remove the motor hood.

2. Use a permanent marker like a Sharpie and mark the roller positions on the bolt on the front roller and bolts on the rear roller- not all front rollers have this adjustment bolt.

3. Loosen the walking belt at the rear of the treadmill.

4. Remove the front roller adjustment bolt.

5. Some higher end treadmills use straddle covers that have an undermount or slide mount. If you don't see staples or bolts on the top of the cover, do not pry them up. If you do have one stapled or screwed down, use a flat head screwdriver or similar instrument, pop the plastic deck cover on the right hand side up (if you are standing on the treadmill like you are using it, the deck cover on the right side). If you see screws, simply unscrew and remove the screws. Screws are included to reattach the cover near the end of installation.

6. Remove the deck boltsmost have 3 or 4 bolts.

7. Once the deck is loose on the right side, completely remove the screws from the rear roller. Be careful with the plastic endcaps. The endcaps and the roller need to be removed in this step.

8. One person should hold the deck up and hold the front roller in position near the pulley while a second person removes the old walking belt (some models that do not fold and a very few number that do have a side handrail on the right side that attaches at the base of the treadmill…if yours does, remove this handrail before removing the belt). If you are talented, you can do this with a single person.

9. With one person holding the deck up and holding the front roller in position near the pulley, the second person should reinstall the new walking belt. Once the belt is in place, raise the deck up again and look underneath to make sure the belt is in the center of the belt guides that stick down from the deck underside. When tensioned, the belt guides should make the outside edges of the walking belt turn toward the center of the belt.

10. Replace the rear endcaps and rear roller and start the rear roller bolts. DO NOT TIGHTEN THE REAR ROLLER BOLTS IN THIS STEP.

11. Refasten the deck bolts. Go ahead and tighten the deck bolts fully in this step.

12. Refasten the front roller bolt and return it to the marked position (it was marked in step 2).

13. Replace if you have undermount straddle covers or fasten the plastic side deck cover with the enclosed screws if yours were screwed or stapled down. Removing the staples in the deck with a pair of pliers before reattaching the deck cover is not required but will make it easier to reattach.

14. Retighten the walking belt to the marked positions on the rear roller bolts.

15. Check the walking belt for proper tension by lifting it 2” to 3” in the center of the belt.

16. Test the treadmill for slippage and make adjustments (if needed) for lateral centering or tracking.

17. Once the belt tests good, replace the motor hood.

Feb 17, 2010 | Exercise & Fitness

1 Answer

Have a 4.9 treadmill and cant get it to adjust if i loosen bolts in back it slips if i tighten bolts on motor it quits pulling when i put weight on it can you help

Ok I really need more info but let's take a stab at it. The bolts in the back of the rear roller adjust the belt right and left. It also tightens and loosens. Ok there is also a drive belt from the motor that needs to be tight. Generally you should be able to twist the drive belt about 45 degrees. If it's more than that it probably needs to be tightened. If this is loose it will affect the walking belt the same as the walking belt being loose. So when your walking belt is slipping, make sure you tightened the right belt. Tightening the wrong belt can lead to other problems. Tightening the walk belt with the rear roller- turn both bolts clockwise equally to tighten. Remember the walking belt will travel to side with least tension. So to center belt, adj left or right side to fine tune. If belts are adjusted properly and machine stops when you walk on it, you have other issues. Could be the deck ( the board under the belt) and belt or the motor.

Nov 17, 2009 | Proform 6.5q Treadmill Walking Belt

3 Answers

Whilst jogging hands free the treadmill belt sticks why would this happen

you need to lubricate the belt every 6 months or so. to do this lift up the belt and squirt some lubricant onto the belt board(not the rollers), do this on the left and right hand side.
you may also need to tighten the belt. this is normally done with an allen key, look at the end of the treadmill as if you were to walk onto it, and there should be a plastic cover on each side. look in here and you should see an allen key type bolt. turn each bolt one full turn. this will tighten the belt and stop it sticking.

Jul 17, 2009 | Cadence Exercise & Fitness

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