I have a Dixie Chopper that developed a steering problem today. Can anyone tell me why one of my steering levers becomes almost impossible to move. It is like the hydraulic pump on that side is stopped up or something. When it develops this issue, after you get mad...you can jerk it back and forth two or three times and it will free up. You can raise the seat and there is nothing blocking the movement. It is internal in hydro system, whatever it is. Is there something in the oil, or do I have a pump going bad, or what?