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Treadmill stops and jerks when I run (not when I walk). Almost throws me off. Someone on FixYa said to tighten the motor. But I don't know how to do that. Can anyone help?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

buffalonyman
  • 1865 Answers

SOURCE: Pro-form 320x treadmill slows down then motor stops.

Sounds like it is overheating, you have to disassemble the unit and find why it might be overheating

Posted on Aug 29, 2009

  • 103 Answers

SOURCE: Proform 400GI Treadmill making a very loud noise,

This definitely sounds like the drive motor. One way to check is to remove the drive belt and run the motor without the walk belt connected. Obviously if you still have the noise it will be a motor issue. If not then it will be one of the 2 rollers. Good Luck! Tim

Posted on Nov 13, 2009

  • 1 Answer

SOURCE: I have a Proform 770 EKG Treadmill jerks and squeaks

The drive belt was loose. I tightened up the motor just a smidge using a crow bar. That solved the problem.

Posted on Dec 30, 2009

  • 5 Answers

SOURCE: Treadmill stops when I step on it?

your running belt might b on 2 tight or u dont have enough power going 2 the motor make shure u have a designated power line 2 your machine

Posted on Jan 28, 2010

maxtreadmill
  • 832 Answers

SOURCE: Reebok treadmill

Hi James
Unplug unit remove motor shroud then plug unit back in , press start and begin walking on the belt normally and try to stall the belt to make it slip ( planting foot to stop the belt).
Be careful during this test. If the problem is in the drive belt, either the drive belt will stop when stalled or the front roller will stop when stalled. Here is the procedure for adjusting the drive belt.
Find the motor mounts. Many motors in Icon treadmills have a main pivot joint in which a bolt runs the full length of the motor mount. This bolt will require loosening to provide maximum adjustability. Some models have a single jack bolt and others have an auto tensioner. Single jack bolts are the easiest to adjust.
Find the set bolt(s) on the motor. This is typically run through only one side of the motor mount or may be on both sides but it does not run the full length of the mounting. Loosen this bolt(s) but do not remove. Jack bolt models will have flat mounts and may contain up to four bolts.
Look for a bolt that will tension the motor. If it has this bolt, it typically runs in the same direction parallel with the drive and walking belts. If your treadmill is not equipped with this bolt, skip to Step 4. If your treadmill is equipped with this bolt (very few are) the repair will only require one person. Using 2 7/16" wrenches, make a few turns to this bolt, tighten the bolts and test your treadmill for slipping. If belt continues to slip, and if their is too much tension ( you should be able comfortably twist the drive belt 90 degrees ) then replace drive belt.
If the motor, drive belt, and front roller continue to turn when the walking belt is stalled, the problem is with the walking belt slipping on the front roller, here the procedure adjusting the walking belt.
If the walking belt slips when walked on, first remove the key and UNPLUG THE POWER CORD. Using the allen wrench, turn both rear roller bolts clockwise, 1/4 of a turn.When the walking belt is correctly tightened, you should be able to lift each side of the walking belt 3 to 4 inches off the walking platform. Be careful to keep the walking belt centered. Plug in the power cord, insert the key and carefully walk on the treadmill for a few minutes. Repeat until the walking belt is properly tightened
If the drive belt continues to turn but the front roller stalls, you may have a broken front roller pulley. If this is the problem, you will notice it because the plastic will usually make a loud squealing sound on the metal front roller. The front roller assembly will need to be replaced and the drive belt must be replaced also. We suggest replacing the drive belt as well because it is a low cost item and will most likely, have suffered unusual wear from the problem. Another possibility is that the drive belt has worn down. In some cases, belt dressing may help correct the problem. If not, the drive belt must be replaced.

Posted on May 24, 2010

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Dec 13, 2011 | RTO Sole F80 Treadmill

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I have a Reebok treadmill. The belt stops while the motor continues while walking on it. What could be causing this to happen?


the drive belt is too loose. you need to tighten the belt that drives the front rolller, which drives the walking belt. depending on the type of treadmill there shoudl be a way you can do this by loosening the motor and adjusting that to tighten the belt. it could also be that the belt needs to be replaced and also could be the walking belt. you should try to tighten the walking belt first. that is at the end of the treadmill where you walk on it. there are two holes one on each side of the treadmill where teh belt goes back under the treadmill. there are allen key bolts that you need to tighten clockwise one turn then try the treadmill. if it doesnt tighten then turn another full turn. if not tight enough then it might be the drive belt. if you tighten the walking belt all the way then try to tighten the drive belt.

Jan 28, 2011 | Reebok Exercise & Fitness

1 Answer

When i start running it isnt a steady flow of the belt there is jerks every few seconds making it very hard to run and almost is enough to make you fall what do you think the problem might be


It sounds like you either have a loose walk belt or a slipping front drive pully. The walk belt shoould be tightened so that you can pull up on the edge of the belt about 2 inches. If that is OK, pull the motor cover, start the treadmill and walk trying to stop the belt with you feet. Watch the drive belt this time (the small one going from the drive motor to the front drive roller), if this belt stops, you need to tighten motor, or replace if it is older/wornout. If the drive belt keeps turning fine, watch the front roller and see if the pully connected to the drive belt keeps turning while the roller connected to the walk belt stops, if so you need a new front drive roller.


Hope this helps

Nov 03, 2010 | Epic View 550 Treadmill

1 Answer

When I step on the treadmill, the runner stops and


Unplug unit then remove motor shroud the walk on the belt normally and try to stall the belt to make it slip. Be careful during this test. If the problem is in the drive belt, either the drive belt will stop when stalled or the front roller will stop when stalled.
Find the set bolt(s) on the motor. This is typically run through only one side of the motor mount or may be on both sides but it does not run the full length of the mounting..
Look for a bolt that will tension the motor. If it has this bolt, it typically runs in the same direction parallel with the drive and walking belts. If your treadmill is not equipped with a bolt as described above, the drive belt must be tensioned by hand. While one person applied increased tension to the drive belt, the other person should tighten the motor set bolt(s) that are described in Step If your treadmill is equipped with this bolt (very few are) the repair will only require one person.
If the motor, drive belt, and front roller continue to turn when the walking belt is stalled, the problem is with the walking belt slipping on the front roller.
If the walking belt slips when walked on. Using the allen wrench, turn both rear roller bolts clockwise, 1/4 of a turn. When the walking belt is correctly tightened, you should be able to lift each side of the walking belt 3 to 4 inches off the walking platform. Be careful to keep the walking belt centered. Plug in the power cord, insert the key and carefully walk on the treadmill for a few minutes. Repeat until the walking belt is properly tightened.

May 27, 2010 | Proform 575 Crosstrainer Treadmill

1 Answer

Reebok treadmill


Hi James
Unplug unit remove motor shroud then plug unit back in , press start and begin walking on the belt normally and try to stall the belt to make it slip ( planting foot to stop the belt).
Be careful during this test. If the problem is in the drive belt, either the drive belt will stop when stalled or the front roller will stop when stalled. Here is the procedure for adjusting the drive belt.
Find the motor mounts. Many motors in Icon treadmills have a main pivot joint in which a bolt runs the full length of the motor mount. This bolt will require loosening to provide maximum adjustability. Some models have a single jack bolt and others have an auto tensioner. Single jack bolts are the easiest to adjust.
Find the set bolt(s) on the motor. This is typically run through only one side of the motor mount or may be on both sides but it does not run the full length of the mounting. Loosen this bolt(s) but do not remove. Jack bolt models will have flat mounts and may contain up to four bolts.
Look for a bolt that will tension the motor. If it has this bolt, it typically runs in the same direction parallel with the drive and walking belts. If your treadmill is not equipped with this bolt, skip to Step 4. If your treadmill is equipped with this bolt (very few are) the repair will only require one person. Using 2 7/16" wrenches, make a few turns to this bolt, tighten the bolts and test your treadmill for slipping. If belt continues to slip, and if their is too much tension ( you should be able comfortably twist the drive belt 90 degrees ) then replace drive belt.
If the motor, drive belt, and front roller continue to turn when the walking belt is stalled, the problem is with the walking belt slipping on the front roller, here the procedure adjusting the walking belt.
If the walking belt slips when walked on, first remove the key and UNPLUG THE POWER CORD. Using the allen wrench, turn both rear roller bolts clockwise, 1/4 of a turn.When the walking belt is correctly tightened, you should be able to lift each side of the walking belt 3 to 4 inches off the walking platform. Be careful to keep the walking belt centered. Plug in the power cord, insert the key and carefully walk on the treadmill for a few minutes. Repeat until the walking belt is properly tightened
If the drive belt continues to turn but the front roller stalls, you may have a broken front roller pulley. If this is the problem, you will notice it because the plastic will usually make a loud squealing sound on the metal front roller. The front roller assembly will need to be replaced and the drive belt must be replaced also. We suggest replacing the drive belt as well because it is a low cost item and will most likely, have suffered unusual wear from the problem. Another possibility is that the drive belt has worn down. In some cases, belt dressing may help correct the problem. If not, the drive belt must be replaced.

May 24, 2010 | Reebok 8050 ES Treadmill

1 Answer

I started up my treadmill after a year sabbatical :) to find that it stops abruptly when I increase the speed above 4 and then when I restarted it as soon as I stood on the belt the motor lagged & then...


If the walking belt slips when walked on, first remove the key and UNPLUG THE POWER CORD. Using the allen wrench, turn both rear roller adjustment bolts clockwise, 1/4 of a turn. When the walking belt is correctly tightened, you should be able to lift the edges of the walking belt 3 to 4 inches off the walking platform. Be careful to keep the walking belt centered. Plug in the power cord, insert the key and run the treadmill for a few minutes. Repeat until the walking belt is properly tightened.

Apr 28, 2010 | HEALTHRIDER S600 Treadmill Motor Control...

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I have a Proform 770 EKG Treadmill jerks and squeaks


The drive belt was loose. I tightened up the motor just a smidge using a crow bar. That solved the problem.

Dec 29, 2009 | Exercise & Fitness

1 Answer

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