What you are saying kind of makes sense. When I bought the seal kits for a 135 they were for a cylinder with a 5/8" rod. The rods on my tractor are 7/8". The 2200 has 7/8" rods. I raised the front axle off the ground and cycled the steering left and right about 20 times,added about a quart of fluid and now I have steering but it seems awful stiff compared to when a obtained the tractor. I also noticed when I raised the front end the spindles both dropped about 1/2" so maybe the thrust bearings are gone. But I'm back to square 1 when I don't know my model. I haven't tried to move the wheels with the axle off the ground since I got rid of the air lock but will try tomorrow. After that I will follow your advice to test the cylinders