There is no belt on these, the motor's inside. If you turn the wheel by hand, does it feel tight? There may be somewhere that still needs oiling. Did you grease the gears underneath? If it turns by hand easily, it could be the motor or the foot controller. The best place to go for more info is a Yahoo group called Singer Slants.
http://groups.yahoo.com/neo/groups/s...antsewing/info
If you didn't get a manual, they have one for downloading. You can search through their posts and find all kinds of info for getting your machine running. I have a 500 and some of the info is overwhelming, at first. But everyone there is patient and most of them started right where you are now.
You've got a great machine, you'll just have to give it a little loving care to get it where you want it.
Tate