I keep having this problem with my 3-point hitch.  It goes up-down no problem.  I don't use it for a few months and then it's stuck in the up position.  Nothing changed - I didn't touch the adjustment knob at any point.  I pulled the plastic covers off the area under the seat.  I also pulled the seat and the remaining covers.  I loosened the control valve (the one that the flow control knob connects to) and hydro fluid spilled out and the 3-point hitch dropped.  I replaced the control valve (JB part number LVA800304) at a cost of $1,887.90 (ouch).  That seemed to fix the issue.  However, got the tractor back out after sitting this winter and I have the same problem.  3-point hitch stuck up.  So again I loosened the control valve and the fluid spilled out and the hitch dropped.  I reassembled without replacing anything and it works perfect again.  It's like there is a sticking valve somewhere.  Any suggestions?
	
		
			
		
		
	
				
			 
			 
 
		 
 
		 
 
		