Had a track come off about an hour ago, same one my brother had come off a couple days ago, either the tensioner is junk or something else is messed up.
This Deere has been useful but had lots of bugs since new, it’s out of warranty now so any service calls are going to add $ up quickly. The fan quit several times, the reverser on the fan never worked properly from the time he bought it, the hydraulics have had a few bugs also.
Apparently Deere knew they had problems because there were some service bulletins out about the hydraulics & fan reversers according to his buddy.
I tried to get my brother to buy a Kubota, Takachi (whatever they are called ) or an ASV (Terex) but Deere had the best finance options & his buddy was a Deere tech ( now he has started his own business).