I have an 2006 Exmark Turf tracer 17hp 48" that I bought used. The problem I am having is when I want to turn right and I squeeze the right side ECS handle and the wheel shuts down completely. Its almost like it loses all pressure which is unlike the left side. When I want to go again the power comes back all at once causing wheel spin. I jacked the rear end up and the left side is silent, unlike the right side which has a slight whine in it. I replace the hydro filter with Emark products and no change. Has anyone every had this happen? Any suggestions?