6400 JD loader with a grapple. The grapple opens and closes very slow rest of the loader is fine.A while a go same problem and I took apart the speed control knob and found the guts had came apart screwed it back together and it was fine for a while.It is also slow on the baler tailgate. It is a 300 series valve. Any thoughts?
6400 JD 1 slow control
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