Yes you are correct the boom goes up and down with the curl doesn't work, it just suddenly stopped out of the blue, I haven't changed anything to it in the last 6 years other than change the quick connect five years ago, I'll have to try that I have not tried that yet, it just have a couple days ago and I got almost a month till I have to move hay again so I just started fooling with it thanks.Since you seem to know how to hook up and disconnect hydraulic lines well…
As I understand it you have a function (lift) that works and one that does not work (curl). So have you tried to move the hoses from lift to curl and also curl to lift (swap the four lines) and see what happens then? If it is the valve curl should work but lift won’t. If it is the curl circuit then it won’t work but lift should.
I think that is all correct but think it through and see what you think about that before you do it.
Thanks Moose 🫎