Ran into this problem las year, thought I had it solved, but apparently not. I have a B7500 host...when using a back blade to pull snow.....more importantly, when the blade is angled...I pop the snap ring off of the hydraulic shaft...and the lift arm falls off. I verified correct snap ring and orientation, cleaned the groove in the shaft....but a little bit of side load, and it comes off and the lift arm falls off. I’m about ready to put some tack weld on it. It was 4 degrees today and not fun to be working on it. Any thoughts?