Trying to help Veteran neighbor maintain his property. His 4600 has 2 levers for the 3 point. Position control and draft. These levers are to be " free" from each other. These are not, they move together like the outer shaft has rusted to the inner shaft. I pulled the handles, fiber washers, spring and the quadrant off the shafts. They are clean, but I still put "Blaster" on the shafts and blew it in towards the top cover. Also tried a little heat, to no avail. I have a tiny window using the lever that I can almost use a bush hog. Otherwise it is either up all the way or it drops to the ground. Ring any bells? All my tractors have one 3 point control. How do I free up the controls?