sometimes you have to lift that end up and out to get over the bracket if it is stuck. Mine used to do that all the time. a little lubricant up there might not hurt at all either. Just grab the arm and lift up an inch and then towards you. Probably take care of it.
2010 Jayco Quest G2(SOLD)
2014 Jayco Eagle 33.5RETS
2007 Ram 2500 5.9L Cummins(SOLD)
2015 Ram 2500 6.7L Cummins 4WD