While you wait for answers, we may have found some information which could help you.
Click here for Stops Good Motorsimpson maxi dry 452 tenson pully spring?
Simpson Sirocco 450 does not heat up?
How to fix lack of heated air from dryer?
simpson dryer?
Broken hinge on Simpson Scirocco 555 dryer?
The belt on the dryer stops when going the other way?