Posted by pete 23 on March 25, 2010 at 07:53:31 from (173.87.145.42):
In Reply to: 560 steering posted by farmall650 on March 24, 2010 at 17:13:19:
You need to determine if the control valve is shifting in both directions and far enough to direct the fluid each way. To start with, make sure the splined coupled universal joint is free to slide back and forth or allow entire shaft to move back and forth. The input splined shaft has to move in turning one direction and out turning the other, this moves the mechanism internally to toggle the spool in valve back and forth. It is common for the nut to come loose inside or set screw holding recirclating ball mechanism into piston. You can test for leaking cyl piston rings by unhooking the two lines going into bolster and pressurzing them with air, wheels off ground, air should turn wheels. This will tell you if fluid is just going on past inside. Take end cap off steering valve under unit and see if spool moves both directions. Yes, you may have to tear it all down to repair but be sure it is not just simply the external linkage like maybe someone didn't get the steering shaft positioned properly where the two shafts are keyed together by the starter. I have seen this happen several times.
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