Front roller pulley worn and slipping on front roller. Where do you get replacement pulleys for this model. New front roller is $470 thats way to much

If we use the treadmill daily it might need maintenance regularly. Running of 180 hours on the treadmill might lose the belt. Drive belts usually last for longer time of 5 to 7 years.So you have to adjust the tension of the belt.
Keep enough tension in the drive belt
If a user wants to improve the motor efficiency it is necessary to connect the motor to the front wheel which helps the belt to spin.
Too little tension results in slippage, excess heat and high-pitched noise, or too tight belt produces tension causing stress on belts, bearings, and shafts. Prevent premature motor failure by adjusting the belt at a suitable place. The belt should be fixed half an inch of play.
To improve the efficiency of the motor align the belt properly and lubricate it on time. Keep in mind such useful options may help the user. When the belt slips off the track, the friction between the belt and drive pulleys causes the belt to overheat. If you hear a high-pitched noise, it's time to replace the belt with a new one.
How to Ascertain that the drive belt can still be used?
If you test Front-wheel by walking on the treadmill and the belt stops but the motor is still moving, It means that the drive belt is loose and needed to be tightened or replaced.
Keep in mind
There are some exercises that are not suitable for the treadmill like jumping on it. This kind of usage can be rough on your treadmill and lead to your treadmill belt slipping.

This is likely due to a worn and slipping belt. Replacing the belt should solve the problem

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.

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Take the motor hood off and set aside. Straddle the walk belt and set the speed to 3 or 4. Take one foot and step on the walkbelt hard. While doing this look at the pulley on the front roller. Does just the roller stop and the pulley keeps turning, does the roller and the pulley stop together or does just the walkbelt stop? If the walkbelt is the only thing to stop it is loose. If the pulley, roller and the walkbelt stop the motor belt is loose. If the pulley continues to turn and the roller and walkbelt stop your pulley is slipping on the front roller ( press fit). Two solutions: 1) replace the front roller or 2) pin the front roller to the pulley. Align the pulley roller to the motor pulley by tapping it into position. remove motor belt by loosing motor. Drill 1/8 hole through the pulley and roller. Take a larger drill bit and countersink the pulley hole so the head of a screw will be below the pulley grooves when installed. install the screw. If you mess it up -- turn the pulley and roller and try again. This is a permanent fix for this problem. You may have a little pulley wobble and that is OK.

Pull the hood off. Stand on the sides of the walk platform and start the belt at 4mph. Take one foot and step on the walk belt hard. Look at the pulley on the front roller. Does the pulley continue to turn while the roller stops? If so, the pulley is slipping in the roller (which is a press fit). Replace the front roller or remove the motor belt from the pulley.Align the pulley with the pulley on the motor by tapping with a mallet. Drill an 1/8 hole throught the pulley and roller. Countersink the pulley hole so a small head screw will be under the pulley groves. Install screw in this hole. This is called pinning and is a pemanent fix. If both the pulley and the roller stop together when the belt is stepped on the motor belt is loose. If only the walkbelt stops when stepped on, the walkbelt is loose.

Either front roller may need to be replaced or the motor drive belt may need to be adjusted. This problems are caused when a walking belt is worn out and in need of replacement. Too much tension can cause bearing failure in the motor and the front roller and front roller pulley failure.

Motor drive belt adjustment: The motor drive belt is adjusted independently from the walking belt. Some newer models have an auto tensioner which is a lever that has a wheel that puts pressure on the drive belt and a spring on the other end that automatically loads the belt to the proper tension. You should not adjust these since they are preset. Tension can be affected slightly by adjusting the tension of the walking belt but if you have a slipping problem, the drive belt will require replacement. If your drive belt is too loose, it will slip on the front roller pulley or the motor pulley. If it is too tight, it will increase your amp draw to the point that you may have an electronics or motor problem. Due to this, it is better to be on the safe side and replace a drive belt rather than risk over tightening it.

The pulley on the front roller is pressed on. Sounds like you pulley has broken free from roller. The front roller needs to be replaced. A quick fix which I've seen last a long time. First verify that this is what your problem is. If it isn't obvious mark roller and pulley, use machine and see if your mark moved. Sounds like yours should pretty easy to tell. If it is indeed lose, mark where pulley sits on the roller. Remove the drive belt. Take a hammer and gently bump pulley to the side. Apply some super glue where pulley normally sits. Bump pulley back into place and let dry. Replace drive belt and check.

ALWAYS UNPLUG YOUR DRYER BEFORE ATTEMPTING TO DO ANY WORK ON IT.
Sounds like your problem may be a worn belt, or the belt may have slipped off of the motor pulley, or idler arm pulley.
If you have to check/replace your drum belt and if you have a front loading machine.
Remove the electrical console that holds the timer switch, start switch, etc. from the top of the dryer. Be real careful not to knock any of the wires off of the timer switch. Then remove the top of the dryer.
Remove the front of the machine, this will expose the belt and drum, remove the drum and belt and this will expose the drum rollers, idler arm bracket with pulley, and motor with pulley. Pay attention to the route of the belt, this will come in handy when you go to reinstall the belt and drum.
Sometimes the belt will slip off of the idler arm or motor causing the drum not to turn.
While you have the drum out, I would recommend that you lubricate the drum rollers at the shaft of the roller with a good grade of machine oil like 3 in One oil. This will save you a problem later with the rollers getting noisy, also check your drum rollers for flat spots, if they have flat spots on them this will cause a noise like a thumping type noise. You will need to replace the drum rollers if they have flat spots on them.
I will include these two websites for parts and further help:
http://www.partselect.com/
http://www.appliancepartspros.com/index.aspx
Both also have chat assistance 24/7.
Good luck,
I hope this helps

1st- check to see if pulley is worn and wobbly
this can cause the problem
idler pulley may be jumping
check all pulleys and make sure there not wearing out

Since the drive pulley is slipping on the roller itself, then the front roller will need to be replaced.