My 6600 was leaking PS fluid through the steering column and had gotten so bad that it would leak the reservoir dry in about 20 minutes. I took the top section of the column off and replaced the O-ring and seal in the upper bearing at the top where the column breaks apart. That's all we did. When we put the column back together, it was no longer leaking but the wheels would only turn to the left under power but would not turn to the right. I jacked the front of the tractor up and it turned both ways but the power steering only worked to the left. We bled the system several times, thinking it might be some kind of air lock but that didn't help. I have spoken with the two dealerships in my area and neither of the shop supervisors had any idea what was going on. They had never encountered the problem. Probably the easiest repair I have done on the tractor and the most baffling. Any thoughts would be appreciated. I forgot to mention, I also took a pump off one of my other tractors and that didn't help.
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