Were basically farming an ancient river bed so stones and rocks are just something you get used to, we do have some good ground without stones but the majority of the paddocks have stones in varying quantities.
We have similar thing with a 7530 would run cold under idle or low load but when working gets up to temp fine replaced all the thermostats but still runs 10c lower under low loads not sure if there is another problem somewhere but dosnt seem to effect it in anyway.
Would they not just be walterschied parts every slip clutch on a JD machine ive taken apart has been walterschied . If you can find out the torque required they can usually tell you the correct combination of springs.
We have Fendt and john deere and realy dont like the spool leavers in the fendt i always have to have spool screen open on the monitor just to see what is happening as there is no feel to them and they return to neutral position, the JD on the other hand while a little clunky are very simple to...
If its a machine you have had for a while and know how its been looked after then keep it , you will gain very little in performance or running costs by getting a newer machine and 7000 hrs is not hogh hours for a digger.