http://item.taobao.com/item.htm?spm=...id=14999949320
http://item.taobao.com/item.htm?spm=...&id=4228922994
http://item.taobao.com/item.htm?spm=...&id=2388228770




I am not 100% sure if those are your related parts? You would need to take off the side cover and if you do you need the gasket to replace.
http://item.taobao.com/item.htm?spm=...id=16404239899


Its hanging up and why is something to do with all the parts above, I am guessing.