The belt is stuttering on treadmill when walking on it

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.

Drive Belt Installation for Treadmills

The drive belt is used by the motor to drive the treadmill walking belt via the front roller pulley. A drive pulley is mounted on the roller and the roller has knurling or a sleeve to help it drive the walking belt. The treadmill console detects the current speed of the treadmill by monitoring the movement of a magnet mounted on the front roller pulley with a reed switch or by using an optic switch which monitors an optic disk mounted either on the front roller or on the motor shaft. If the sleeve moves to the side, you will not be able to keep the belt centered and many optic disks can be warped if pushed to the side by the sleeve if it moves, but we do have replacement sleeve kits if needed.

Steps to Replace Drive Belt-

1) Remove the safety key and unplug the treadmill from the wall outlet.

2) Remove the screws securing the motor hood and gently remove the motor hood.

3) Using an Allen wrench provided with the treadmill, loosen the two rear roller adjustment bolts until the rear roller comes into contact with the walking board. Turn the bolts and equal number of turns on each side and keep a count of how many turns you made so you will know how to properly re-tension the walking belt.

4) Remove the drive belt from the motor pulley. Place a screwdriver between the pulley and the belt and turn the pulley by hand. Use the screwdriver to guide the belt over the edge of the pulley. Be careful with the screwdriver to prevent damage to the pulley.

6) Mark the position of the front roller axle on the front roller bracket above the front roller adjustment bolt using a Sharpie marker so you will know where to put the bolt back into position. Remove the front roller adjustment bolt if your treadmill's front roller has a pitch adjustment bolt. If your treadmill does not have exposed roller bolts you will need additional instructions. Please see the troubleshooting section on our website for further help.

7) Gently slide the front roller from out of its mounting position on the frame. Do NOT remove the roller from the walking belt.

8) Slip the old drive belt off the roller and loop the new drive belt onto the front roller pulley.

9) Replace the roller back into its slot on the pulley side and re-tension the front roller pitch bolt to its proper place using the Sharpie mark as a guide.

10) Using the screwdriver, loop the drive belt over the motor pulley. Many Icon units originally had the drive belt misaligned by design (if you can believe it). This was to use the side load of the drive belt in order to keep tension lower. It does lower amp draw for the machine and replacing a side load drive belt occasionally is much cheaper than replacing a motor and/or controller so if your original drive belt was off-centered, install the new belt in the same manner.

11) Re-tension the walking belt.

12) Plug in the machine and check the drive belt for slipping. You can use some automotive fan belt dressing on the grooved or contact side of the belt to help it with grip on the pulleys and it will treat the belt as well. We prefer using belt dressing rather than over-tensioning the belt for the aforementioned amp reasons as well as additional stress placed on the drive system parts.

13) Replace the motor cover and test.

14) Make sure the walking belt is not slipping and is properly aligned and your treadmill is ready to use.

Copyright 2009 by TreadmillDoctor.com, Inc.

All illustrations, photographs, and scanned images, and text are the property of TreadmillDoctor.com, Inc. and may not be reused, retransmitted, copied, given, sold, or bartered to any third party. The recipient of this property is authorized to use it only in the manner expressly indicated by a staff member of TreadmillDoctor.com, Inc. All rights reserved.

You need to adjust the roller tension, The adjustments are at the sides of the treadmill by the rear roller. Sometimes there is a cover over them.

it's a big job, the front cover protecting the motor unit has to be removed, the rear roller has to be loosened inwards by using the large allen key to release the tension. The front roller has to be loosened and lifted out of the treadmill (it may need cleaned to take away any rust)
The rear roller can be lifted out and then the bed (running deck) needs unscrewed (allen keys) this should slide out. The new running belt should be put in place in the treadmill, place the front roller in place, the bed and the rear roller, fasten each of them up and adjust the rear roller so that the belt runs straight and it tight enough that when walking on it, you can't stop the belt.

Dear Sir:

Hello, I will try to help you, inmediately.

Please follow the next step:

1) 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.

2) 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, . 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 from Steps 1 and 2 and test your treadmill for

slipping. If belt continues to slip, repeat Steps If a second attempt does not repair the problem

3) If you have arrived at this step, let's make sure you have a drive belt tension problem. With the motor cover

removed, 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. 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 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 entire front roller assembly repaired or

replaced (see the help topic on replacing a pulley) and the drive belt must be replaced. 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.

Please check this video:

http://www.youtube.com/watch?v=yX_0vRPdMfU&feature=related

http://www.youtube.com/watch?v=zXeHMWTcLUY&feature=related

E.CUADRA

MANAGUA, NICARAGUA. C.A

Either the walk belt is loose or the front roller pully has spun. In order to determine which one, you need to remove the moter cover and watch the drive belt and front roller while you walk, try to stop the belt and see which one stops. If the walk belt stops and the front drive roller keeps turning, then you need to put a couple of turns on the rear allen bolts. If the roller stops when the walk belt stops, see if the drive belt(small one going to the motor) stops as well. If the drive belt turns fine,but the walk belt and the front roller stop, you need to replace the front roller, because the plastic pully that is connected to the roller, is pressed on and cannot be tightened.


Hope this helps

If you need further help, I’m available over the phone at https://www.6ya.com/expert/matt_8dbc24bf722649ac

There is suppose to be lube between the deck and walking belt to reduce friction while walking on it. If the walking belt has sufficient tension then I would open up the motor cover and check to see if the motor belt is worn and it needs replacement.

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.

If the problem is in the drive belt, either the drive belt will stop when stalled or the front roller will stop when stalled. Follow this procedure: First remove the key and UNPLUG THE POWER CORD. remove motor shroud, then 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.
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 Tighten the bolt and test. If the problem is not corrected, repeat steps above and retest.
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. Follow this procedure:
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 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. Rear Roller Adjustment Bolts


If the drive belt continues to turn but the front roller stalls, you may have a broken front roller pulley and front roller must be replaced.
Follow this procedure: First remove the key and UNPLUG THE POWER CORD. remove motor shroud. Loosen the rear roller and remove the two adjustment bolts. Some models have a spring loaded tensioner on the right hand side so be careful when removing these bolts. After the bolts have been removed, remove the rear roller end cap(s). The rear roller should now simply slide out of the walking belt.
Remove the motor hood. Using a black permanent marker, make a mark on the front roller adjustment bolt on the motor compartment side at exactly where it fits flush with the roller so you will know where to retighten it later. The adjustment bolt is on the right hand side of the front roller. Then remove the bolt with a 7/16” wrench. then remove front roller and replace with new reverse procedure mentioned above

Unplug unit then remove motor shroud then do the following: If the problem is in the drive belt, either the drive belt will stop when stalled or the front roller will stop when stalled. 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 drive belt continues to turn but the front roller stalls, you may have a broken front roller pulley.

1) Adjusting the running belt if the problem: If the walking belt slips when walked on, UNPLUG THE POWER CORD. Using the hex key, turn both idler roller bolts clockwise, 1/4 of a turn. When the walking belt is correctly tightened, you should be able to lift each edge of the walking belt 2 to 3 in. off the walking platform. Be careful to keep the walking belt centered.Then, 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.
2) Adjusting 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.