Posted by mEl on May 05, 2013 at 14:24:27 from (96.249.137.235):
In Reply to: Hydraulics on Kubota posted by teachingscience on May 05, 2013 at 13:19:46:
I work for a Case/Kubota dealer but specialize in new Case hoes and loaders and was there when Case introduced their first hoe and loader. Most modern hydraulics as complex as a hoe and loader have load check valves which hold the backpressure from the cylinders till the oncoming pump pressure can lift the loadcheck off it's seat allowing a drop free lift. I would suspect a load check in the particular circuit that is dropping. We have replaced many in the Case skid steers for just what you are describing although a foot is more drop than I experience with those failures.
Changing filters is a maintainance issue and usually does not correct problems. When looking for problems often we cut filters apart to see if evidence of detrioration of packing or worse yet metal fragments which indicate deterioration of hard parts.
As previously stated, I work with full size wheel hoes and loaders but the same principles apply.
As simple as it may sound, if I had a weak circuit such as you describe with that stabilizer I would automatically look at the spool stroke to insure it was travelling full stroke in the weak direction.
I do not know about Kubota but the stabilizer sections on Case hoes do not have secondary reliefs. Just drawing on my years experience hopefully to point you in the right direction.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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