Great video. I have a couple of additional suggestions and tips. Mine is a 520x from around 2003. I would recommend taking both rear end caps off, unscrew tensioner bolts for rear roller and just remove that roller completely. It makes maneuvering that belt off and on a lot easier. I actually swapped my belt to correct slippage, but that ended up not being the issue. I ended up having to replace the front roller as the bearings were bad which I should have known just by how noisy the unit had become over the years. Tip on roller replacements. It is much cheaper to just replace the roller bearings vs buying entire roller assembly and there are plenty of videos out there on how to do that. In my case the front roller has non-serviceable bearings, meaning you can't replace them. At the ends of the roller I had plastic caps that are part of the mechanism that holds the bearings in place. No way to remove without destroying, so save yourself some time and just buy the new roller if you have the plastic caps. Tip on that is to go to searspartsdirect to order as it was only about $60 there and the other parts places are charging 120-150. Good news here is that the replacement roller I got does not have the plastic end caps so if they ever go bad in the lifetime that I own this I will be able to just replace the bearings. Hope this helps others. thx.

My belt tore at the same exact place, it was a small tear that I cut but then ended up getting snagged where your belt did and needed replaced. Thx for the video.

Took me 10 mins to do mine thanks to you! Cheers mate!

Thanks for making this video! I was able to replace my belt following your instructions.

Happy to find a video about my exact model. Thanks!

Great tip about how to get both tension setting screw/bolts even!!! Additionally, here's one of my tips - use a piece of styrofoam to insert all the screws/fasteners in, maybe use a Sharp'e marker to label locations where they came from on the styrofoam...sometimes just a sketch of the item (TREADMILL) and poke the srews on the locations on the sketch - then you won't lose the screws, and know exactly where they go. But remember, left over parts means you improved it!

Thanks for making this! super helpful.

Thanks I’ve got the 875E and the screws for the plastic sides were hidden under the adjustable cushion strips! Everything else pretty much the same, ,,again thanks!

Amazing job explain everything. Thank you.

Thanks a lot! This video was a huge help

thank u all the way from the US Virgin Islands! 🎉

Thank you. Very helpful

Hi, very clear explanation. Thanks !!!

Thank 'u for your time lesson. Good job

Appreciate this vid! Regarding deviation---- Do the foot rail screws (where the allen key goes) just "hang out" (on the end of the screw) through a loose/oval hole (just to keep them straight somewhat) or are they threaded at the end of the screw with a hole that fits the screw? I bought a cheap treadmill and we're having insane problems with it. The left foot rail has the "oval" hole (bigger than the screw itself), and the right foot rail is fully threaded. When I adjust the belt deviation, the right is damn near impossible to tighten (because it's already WAY tight) and the left can loosen or tighten easily. Something has to be wrong. Any help is appreciated, thank you!

Thanks. That was great.

Props man! Thanks!

Thanks for your video! I do wish you turned the treadmill and taken the video from the other side so it was more visible and nix the flip flops on a treadmill 🙃

Thanks for tips!

Hola. Did you realease the belt of the motor or it happened when you took the tensioner screw out? Gracias

Very Helpful🤠🇺🇸

That bolt with a nut on the back, it would be preferable to use a socket and ratchet so you don't lose the nut in the abyss as soon as It comes off. If there isn't enough space for that, lossen it until bolt isn't protruding from the nut. The put a piece of tape on the jaws of your wrench so it can stick to the nut. It might sound dumb, but it's alot nicer than hunting for a loose but inside of a treadmill

Thank you very much!

Cute doggie, mine will be helping me replace my belt too.

Very good like it.

I have the exact model and will be replacing my belt soon. Any info on part number? I’m sure it’s in my manual but for other viewers. And do you know about how many hours you had prior to replacing? I’m near 200 and I’m starting to get that outer curvature. Thanks for the video by the way!

Hi, James! When you unfurled your new belt, was it fairly tight around the board and rollers at first, or was it always somewhat loose? I bought a belt that I thought was correct for my ProForm model, but it looks as if it's just long enough to get around the board itself, and doesn't seem to intrinsically include extra distance to go around the front and back rollers.

Good video. Best part was the cameo by Coco!!

I cant make the exact adjustment to each side. It keeps rolling Either right or left! Any recommendation?

Thank you for the video. Very helpful. I needed to replace the black running belt, bc it went on a diagonal and starting ripping. We replaced it, I turned it on and the new belt start moving at a diagonal and if I don't it, it will chew up the new belt. Any suggestions.

Awesome

Good evening I have benefited greatly from your channel I bought a new belt and it fits very well. - The sound of the machine has improved The machine is not heating up - And we finished touching the electrode in the handle *I have two questions 1- After I installed the belt, I began to hear a sound as if it was the sound of wood. This is if I was running in front near the machine, but if I went back away from the machine, I did not hear the sound, and I made sure that the wood screws were tightened. Where does this sound come from? 2- My device is the F85, and I walk on it for a full hour between walking and running. Some of them told me that this burns the machine because the device cannot bear it, so what is correct?

Thank`s.

Thumps up

Gracias a pesar de que no muy bien inglés le puede comprender lo que explicó

I have pro form 505cst would you know if its the same ?

at 5:33 you mention that bracket under the deck. on my treadmill the belt was on the outside of that, not the inside. I replaced mine the same way, but you said to put on the inside. just curious your thoughts on that.

just saved my bacon! thanks.

Where can I buy the lubricant for it??

Hey there, I know you published this a while ago and I am struggling to find the proper hex key for the adjustment belt as none of my allen key seem to be fitting and I can't adjust nor replace the belt! At 3:06 of the video, you are using a key to take the screw out: could you help me identify the size of the hex key you have used for this? Thanks!

In the beginning, I think he says he unscrews both sides but you probably only need to unscrew the right side. Do both.

What made you change the belt? Was your treadmill slipping?

Do you think it will be somewhat the same for a proform zt6

I got it all replaced. the new belt is making a staticy sound. I'm assuming thats the belt relaxing as it moves for the first time. Did you experience that?

I have a question what will make the treadmill shut off after one second after pushing start button

Do you have to use the right side to remove the belt? Can it be done the same on the left side?

Hi James, it may be too late as it was posted 5 years back, But please help me if you can. My drive belt is slipping even with new one. The motor mount is not adjustable. Please help, how can I do it.

What I do to save time and not struggle taking the old belt off, I take a razor knife cut the belt and pull it off like a roll of toilet paper. Just a small tip for your viewers.

Has the wooden platform break on anyone?

Hi.I hope you can help me.i have a Proform 750 much similar to yours.I bought this Treadmill on line here in Italy last year in Jan. In hours of use about 250 hours.The distributor is in England,contacted them about the problem with email,never got an answer.The problem takes place when i start the unit,as soon as i start it the belt moves to left side about 1/4 of an inch.I get on it and in within 10/15 minutes of continue usage,the belt slowly moves back to the right to the original position before i started well center.It is well lubricated What do you is the problem? Thank You

🙏🙏🙏

My drive belt slips i replace the belt and won't hold to the motor is there a adjustment to get drive belt tighter??

Hi any advice on why the belt slips especially when stepping harder

Is there a place that you can get a good price on belt?

Is that a Puggle??? We have one too - he's 14 now and just as freaked out by our treadmill LOL!

Where did you buy the belt?

How did you bring the treadmill down?

When I lift mine up, it gets stuck about half-way and won't go all the way up. I am sure it is just a simple thing, but how do you get it to go all the way up?

Where do you buy the bell

What if the treadmill stops when you step on it. It runs pretty good when nobody is on it

Where did u get ur belt?

NOTE: This product works exactly as described. kzfaq.infoUgkxguEIMc_Qwab-3QMTpF6jaRL80hiOOsIN It originally earned a four-star review due to a minor defect (see below). However, the manufacturer's customer service rep (Lita) went above and beyond the call of duty and deserves five stars now. I wish I could give even more!I purchased this item which arrived quickly. Assembly instructions were easy to follow. There was only one problem: One bolt did not screw into the hole properly. I called the company. Their customer service rep (Lita) was terrific! She took all my information and submitted a request to replace the defective part. I'm hoping to finish assembly and start using this treadmill soon. (Fingers crossed...)FOLLOW UP: Lita called back to inform me that the company will send a replacement part AND a technician(!!) to install it properly. AMAZING CUSTOMER SERVICE!! Thank you!!

Pro-form turns on, buttons don’t work & fan doesn’t work

Why waste the time removing the belt just take a razor knife and cut it then pull it off like a roll of toilet paper. Great video !

Sounds like this is very loud.. Is the belt on right

How to tighten my belt

what about the noice ?

That old belt is too wide for that machine. Make sure you have the proper size belt.

Was not it possible to fix the belt , just cut the torn side and that is it.

this shit flipped over in the middle do my workout i almost lost my shit

Its not proform advance 525X !

Hamster machine for humanoids