Good question. When I took it apart the spring bottom was about a 1/4 below the shoulder. The pin looks discolored in the picture but felt smooth to the touch and once fully assembled moved freely like the one in the new spare. Not sure if there was a surge in pressure that pushed the pilot...
My mystery is solved!
I could swing the boom to the left but not to the right. If the tractor was on a slop leaning right, the boom would slowly move to the right indicating the pressure relief valve was open. Many people have suggested shaking the backhoe with it tilted the other way using...
For reference, I had checked the fluid level the day before and all was good with no leaks to draw it down. Will recheck this weekend again but expecting it to still be fine. I hope to take the problem relief valve out to compare to the spare one I have for the boom once I get time. I will...
I have the spare pressure relief valved for the boom hydraulic control valve when that acted up a couple of years ago and will take that out of the bag for some close up pictures this weekend. I may still remove the swing relief valve to compare even though the 2 are different part numbers...
I found the parts diagram for the swing control valve below and it shows an overload relief valve on the top and bottom (part # 100). One for right swing and one for left swing. I had an issue 2 years ago where the boom would fall and pulling back on the stick (boom up) would raise it and...
You will never guess what happenned..... I joined the forum tonight because yesterday digging out a stump on a slight incline where my M59 tractor was leaning to the right. After a few movements of the backhoe it stopped responding to the left swing control input and slowly moved all the way...