My belt is slipping to one side and i no longer hav the manuel

assuming the belt and all those surfaces are clean it might need new centrifugal clutches.

There should be a diagram on the mower deck. The deck should be on the front hooks and have the rear pins engaged. Follow the diagram to install the belt. It may help to tie it in place with twine as you go. The last pulley to slip the belt over is the one on extreme left. You will need a 3/8" socket driver to slip into the square hole. Pull that back to extend the spring until there is enough slack to slide the belt over the last pulley.

BE CAREFUL!!!!!

If the treadmill belt continues to slip even after you have adjusted the rear roller bolts, then it is time to replace the running belt. These belts do stretch over time and must be replaced when they stretch to the point that it can no longer be tightened enough to not slip.
https://www.sportsmith.com/walking-belt/product/31332

One of the belts is loose. I would say it is the Alternator Belt.
What happens is that when you use the battery to start the car, the alternator immediately attempts to charge the battery back up once the car starts.
If the belt is loose, the belts slips some, making that horrible screech, until the battery is charged enough that the belt no longer slips, because the alternator no longer needs to make as much power, and the screech goes away.

Check to see that your alternator belt is the next one to replace, and tighten it up to specs.

hi your belt need to be tightened, check your manuel on how to do this. but do not walk on the belt when its doing this you can damage the belt and the motor very expensive to fix.

Under your motor hood you have a drive belt that can also slip. Depending on make you may after loosening the motor bolts and have an adjusting bolts.

if the serpen tine belt slipped off chances are that the spring loaded adjuster pulley is no longer functioning like it should replace the belt tensioner assembly and new belt. you can also purchase a repair manual at an auto parts store for very little as well as ther parts. there should also be a diagram under the hood that shows the correct rounting of the serpentine belt.

It is a straight forward procedure, but getting it around the fan is tight. Just put a wrench on the belt tensioner pulley, and pull up on it to loosen the belt. While holding the tensioner up, slip the belt off. Just make sure you draw a diagram of the belt routing, before taking it off.

It could be an old belt even if the upright is new. Check that the beater bar is not clogged with dust or threads and find a replacement belt for this vacuum and fit it to see if there is any difference. If not, then there's a problem with the vac and it should be returned.

Here are two solutions one is to get the belt centered on the treadmill and the other is to tighten the belt.

There should be two bolts in the rear of the treadmill, one on each side. These bolts adjust the rear roller of the treadmill. The walking belt will always go to the side that is looser. To get the belt back on track, (if you can start the treadmill so the belt is running) tighten the bolt on the side that the belt has slipped to. Tighten the bolt a little bit at a time. If you tighten the bolt too much, then the belt will go to the other side.

To tighten the belt, start by locating the two bolts that adjust the rear roller (one on each side of the unit in the back). Run the unit at about 3 mph. Tighten the bolts a 1/4 turn at a time. Make sure that what you do to one side, you MUST do to the other side or the belt will get off center. After you tighten it 1/4 turn, check the belt to see if it is still slipping. If it is then tighten the belt 1/4 turn again. Continue until the belt does not slip, but do not tighten the bolts more than 2 full turns.

As far as the manual, I have not been able to found anything yet.