Jd 830 3 pt lift

Lift has problem named to know if thermostatic control valve has a spring and check ball mine has spring and PC of metal but let's fluid bypass all time should it?
 

Welcome to YT.
It's possible the rockshaft control valve seals are leaking as JD utility tractors similar to your tractor have a long history of the seals mentioned failing!
 
(quoted from post at 16:12:51 01/09/17)
Welcome to YT.
It's possible the rockshaft control valve seals are leaking as JD utility tractors similar to your tractor have a long history of the seals mentioned failing!
TX Jim I would like to speak with you about this tractor
 
I have removed rockshaft housing from
tractor when I use air to operate the arms
raise but as soon as I let off of air they
begine to fall also residual fluid and air
is coming out of what I think is thermal
valve part number at27481
 

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