How to repair loose pedal on shwinn exercise bike?

I work at a gym and the place where the pedal connects directly to the bike is loose. It looks like there is a bolt going through it from ther outside of the pedal into the bike. I am not sure how to loosen/tighten it or repair it. Any suggestions? Here is a website with a diagram of parts. a href="http://www.krislynn.net/catalog/index.php?cPath=4_35_37&sort=5a&page=1" rel="nofollow"http://www.krislynn.net/catalog/index.ph…/a