Need some help on how to take out the priority valve plug on my pressure valve.  Does it screw out? Or is it just pressed in and the oring are making it stick?

Im still fighting my hyd system.  After raising any implement, we cant lower untill it feels like letting you or you lower the 3 point a bit then it seems to lower.  Fluid levels are good and filters are new. I was going to try and clean and inspect springs, seats and replace orings on the pressure valve and see if one was sticking causing it not release when wanting to drop the planter.