4930 boom lowering unexpectedly ??
hi guys need some help. I have a 2011 jd 4930 sprayer and my centre boom rack lowers itself all the way down unexpectedly while I'm spraying. I tried disabling my auto boom height control and centre rack control and spraying in manual mode and it holds its height than and i can raise and lower the tips and i can raise the centre rack and it holds but as soon as i try and lower the centre rack it lowers itself all the way down and if I press the raise button to stop it from lowering it raises it up but as soon as i let go of the switch it lowers itself all the way down again. here is the weird part though when it starts lowering itself down unexpectedly if i press the spray button on the hydro handle to turn the spray off it stops lowering itself immediately and holds its height. any ideas??