I have a 371 Porter Cable belt sander that has stopped working. The motor runs at full speed but the belt stops moving or slows down considerably when even slight downward pressure is applied. At first I thought that the drive belt was broken but it looks OK. I want to take the sander apart and look deeper for the problem. To do this the drive belt needs to be removed. Because there is no provision to remove the tension on the belt, (you can almost play a tune) it takes a $230 tool called an A19540 SRT installation tool to add/remove the drive belt. If I could find a picture of this thing, I might be able to make my own (much cheaper) but I haven't had any luck finding a picture or description on the Internet.
I have a picture of the drive belt:an assembly diagram for the sander: Sander.pdf .
Any advice on making a tool or procedure for adding/removing this belt on my own without spending $230 or sending it in to Porter Cable? I really like this sander when it works.