After recently getting this sled back together after 2 years of sitting, the brake is having problems. We just took the track off and put the right size on. But now the brake when tightned all the way in, locks up the sled. So i back off on the bolts and it works. But then the bolts back off and eventually have no brakes. Is there saposed to be a spacer in there it can be bolted down all the way?