The top part of the belt goes around the small red knob at the top. It also drives something else but should be in place. It is pretty much obscured by the side covering. Once you look inside that, it becomes easier to see how it is done. You can download the User Manual from the bissell website....go to bissell.com and then click on international to get to the UK site. The manual is a PDF document but it has the information that I think you want. My Proheat gets clogged with dogs hairs and this type of thing is what puts a stress on the roller and belt. Try giving the belt area a really good clean now and again to increase the life of the belt.
Alex, April 2008
