I'm in the process of rehabbing a 52" Wright Stander and had a few questions... I picked up the machine cheap because it had issues with the right side hydro drive. Closer inspection revealed a bent hub and wasted wheel motor. I replaced both parts and now have a functioning mower. My only issue is when I try to attain speeds above 25%, I get a stuttering noise and feel from the right side. It seems to be coming specifically from the lines connecting the pump to the wheel motor. You can hear it there and feel it if you put your hand on them. When I give it more than 25%, it stutters and loses power. I noticed this while trying to load it into my enclosed trailer to move it from one shop to another. I got 1/2 way up and the power to the right wheel just faded. Is this normally the symptom of a dying/dead hydro pump? My first thought is cavitation, but why would everything be perfect below 25%? When the motor was replaced, I flushed the system and replaced the filter. I manually bled the air from the wheel motor prior to reassembly, and then followed the standard way of bleeding the hydro pumps while I still had it on the lift. BTW- this is more or less a side project I'm working on with hopes of adding it to the fleet someday. The left side already has a new pump & motor. Thanks for any ideas.