You should have your hands on the front and back handles.
How to change belt on floor sander.
Using a hammer either tap the staples or nails back in or remove completely being sure the floors are still secure.
Next all you have to do is pull it towards you with some amount of force.
After installing the new belt use a screwdriver to snap the roller back into position.
Slip the old sandpaper up off the side of the rollers.
3 loosen tracking screw until front roller is released.
Changing the belt once you have located the lever place the sander on its side so that the lever is pointing towards you.
Track the belt on these sanders in the same way as the newer models.
Plug in the sander and holding it above the floor press the on button.
Slide the new sandpaper back on in the same fashion making sure that the arrows on the back of the paper are pointed so the belt will rotate in a forward direction.
4 with sander running use tracking screw to center belt.
On belt sanders make sure the belt is facing the right direction the floor sander will pull away from you so you want the arrows on the inside of the belt to follow the same direction as the travel of the drum and that the tensioner is activated so the belt has no slack.
Keep the machine constantly moving in the direction of the wood grain.
Push the front roller against a hard surface such as a workbench when relieving pressure on the belt to change it.
Think of the belt as the treads on an army tank.
Make sure the hardwood floors are completely clean and have no objects on it while the sander is unplugged place a coarse grit sandpaper on the sander.