Hi. I recently purchased a used EZ8 with expandable drum. It seems to have done a reasonable sanding job on a test floor with one issue-edge belt wear. I looked at the user manual but that issue is not specifically addressed. So I came here to ask what could be causing this and how to correct it. The sander appears to always rough up the right hand side of the paper installed. The drum is in reasonable shape(I believe), and all nail heads have been sunk. Sometimes the paper will make a noise like it is catching internally on the two wear blocks(#70) that are installed under the front cover wear strip( #57 ) of the parts list as seen in the user manual. I will add photo if needed.

"I posted links to relevant photos describing belt wear"
https://photos.google.com/photo/AF1QipPbo8696LOl8ijmRN08DL2K1vBlC2b5wI2Dmjpx

https://photos.google.com/photo/AF1QipO5IksFIeM-c80Uu16wNfgDA4tluEU98gtkOPi3

Ok, I got it figured out. I did the level adjustment by turning the adjustment bolt 1/2 turn CCW which caused the paper to grab a little more on the right side(opposite belt) of the sander and thus pushed the paper a little more to the left, thus centering the paper. Now it does not eat the paper on the right edge.

I also wanted to note that the drum edges have some wear, so they also affect the ability of the sandpaper to grab the floor. The drum, after constant use will begin to look like a football, when that happens, time for a new/rebuilt drum. You will know it when it affects your work, even though you have tried the level adjustment.