Loader hydraulic issue

[Dirt1]

I have a MF 135 with some kinda homebrew FEL. The main lift cylinders on the FEL aren't exactly in sync with each other. The right side rises before the left, and the left side contacts the ground before the right. The issue has broken the welds on the cross members between the main lift arms.
I've had the cylinders rebuilt so thats not the issue.
Any ideas on a possible remedy is appreciated.
I don't have much hydraulic repair experience, so don't beat me up too bad.
Thanks

 

[Zebrafive]

Since the loader is homemade, do some measuring. Check center to center on each end of the cylinder mount pins to the boom pivot point. They should match side to side.

Try swapping cylinders and see if the problem stay the same, if so somethng is binding the slow side. If the problem changes sides, its a cylinder problem, bent shaft maybe?

Look at the boom pivot pins are the square to the boom? Parallel to the ground?