While you wait for answers, we may have found some information which could help you.
Click here for Apart Pull Belt
Janome MC3000 noise?
thread OK on top but not at bottom?
How to unjam a stiff wheel on a Janome 6260?
how can I fix my Janome 6000 Memory craft?
I need to catch the thread on my sewing machine?
Sewing machine won't stop running?