Just finished my 50 hour service on my new X590 no problems.Went to level deck problems. What a cheap design the lift link is made to capture the adjustment nut and is made of pot metal or some other type of cheap casting. The link ,for what reason I have no idea, with a slot cut into it that weakens it. Sort of like using the open end wrench when the box end is what should be used because it surrounds the entire nut. So I go to tighten or raise deck , is a pain in a$$,and something didn't feel right I think the nut or bolt rod has stripped but no it's the cheap link. I was able the make adjustments with a Visegrip C clamp holding the link together so the nut would not spin.
Come on John Deere I paid a lot of money for this garden tractor and you cheapen it up with China made parts,like my deck pulleys and spindles that I also noticed,another ticking time bomb.
Hopefully my local dealer will help me out as it is under warranty. I looked up
part and doesn't cost a lot . I would be happy with free replacement part and I install myself to save the hassle of transporting to dealer.
I posted this so others on this great forum can keep an eye on theirs.