I cut the entire piece of rubber hose out. There was about 6" of it, crimped on to the metal hose on each end like you would normally see in a hydraulic system. I cut it past the rubber on the metal part, put a new piece of hose over top of the metal tube, and put 2 hose clamps on each end.
I *think* one of two things is happening: either I have air in the system that is refusing to bleed out, or maybe the hose I put in has a kink in it and isn't allowing the fluid to return the way it should.
Belt is fine, still fairly new, tensioner working properly.