I have a bx25d and a newly installed bx 750D snowblower with a hydraulic chute rotation motor. The chute motor will only rotate one way, and when I switch hoses it rotates the other way only. I went through the entire troubleshooting procedure, including blowing out the motor with air. The air drives the motor both ways with ease, and I did get some crud out of the motor. So I disconnected the hoses from the motor and cycled through the control stick- I got a good stream from one hose but when I reversed the stick, I got a reduced flow from both hoses! I jyst took the LOADER off and it was working fine. I am at a loss, anyone have any ideas?