There have been some discussions regarding brake lock up with the mechanical brakes, mostly 31 and 32's. You may want to do a search on this site, but I will suggest that pulling forward a slight amount has always allowed mine to release. I did find on mine that a couple of the rollers had frozen on the pins and freeing them up along with re-centralizing the brakes cured the lock up problem. If you want to discuss further send me a PM with your phone number and I'll give you a call.
Last edited by m006840; 03/26/14 07:03 PM.