Threads caught in the take up lever wheel

Question

I am using rayon thread on my quilting project. The pfaff 7570 came to a halt with a grinding sound. I had the machine serviced 2 months ago so everything was working very well. With close inspection I could see thread had wound around a wheel below the the take up lever. Much to my dismay I have tried to get thin crocet hook to get it unwound the thread comes out a little at a time. The machine works now but there is still thread wound around there. Is there any way to open the left side of machine to get into the threading area? That should do it. Pfaff is not like some machines that you are able to open this area. I hate to spend another $$$$ to have this looked at just to remove the threads Appreciate it Nettie