Have a jcb411 here obviously, industrial spec machine. Pushed up a lot of silage in it's life too.
Great machine, got no care at all, and if it wasn't for the silage it would still likely be like new.
Currently needs a radiator and it's blowing engine oil round the engine bay from somewhere, something wrong it won't go into 3rd or 4th gear, been like that for 3 years or more and still it won't die!
Poor aul thing if it had a soul(and it might just have one) it should be proud of itself.
Get a fresh one, keep it away from a silage pit, you will never ever wear it out with farm yard work.