Have read in previous threads that this piece is a common problem. It's the shaft under the seat that's has a spring on each end an a fitting on each end that has a ball bearing that is bored and threaded. Just got my tractor back from a warrenty issue(steering tie rod rubber boot replacement). Had to use the backhoe and noticed that swinging the seat didn't do the seat raise. Looked underneath and this linkage piece was tied to the base on one end but other end was tied to nothing. Has them replace my seat because they cut it after last new tractor dealer issue. Dealer is now charging transport fee for any warrenty issue. After the boot repair, I said," why do I have to pay for transport on a new machine with a Deere Problem!,,,). Long story short, transport fee is on me for the next two years for warrenty issues. Want to get this fixed but it might be cheaper for me to order the part and do it myself. Wanted to fix the boot but dealer said if I do it myself, I void the warrenty. Wish I noted the seat issue on drop off, I would have told them take it back. Getting real sick of these minor problems on a new machine that costs me money to get fixed! If some one has been thru the seat reapair re: turn buckle, would appreciate. Ready to go down there and literally kick someone in the ass! Brand new machine and a lot of minor problems. The steering knuckle repair took 8 days!!!!! Covered under warrenty but banged again for the flatbed transport!!! Love owning the John Deere but venting a bit and sick of factory problems costing me money and a missing tractor for weeks! Don't want to cause an adversarial relationship with dealer but debating wether to go there cause a f$&ng riot!