Posted by Bob And on July 28, 2009 at 13:48:32 from (75.104.160.36):
A neighbor has a 560 Farmall that developed a steering problem in that it will turn to the right but won't turn to the left. I raised the front end off the ground and it turns both ways equally well---with the engine running and shut off. When you get to the turning limits either way it doesn't seem to load the engine or produce a hydraulic "squeal" like they usually do. The steering shaft is free and has about a quarter turn free play, engine on or off. Is there a pressure relief valve in this system? If so where is it located. (Parts schematic don't show one) I'm thinking it's either the power steering pump or a pressure relief valve stuck open, but need some wise counseling as to how to check this hyd pressure and what to do next. I've not been into this system before so thanks a bunch.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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