Ill check that.I dont see how it could be in control valve.With outer cylinders holding,not leaking down.The main pressure line tees off threw that block,supples all 3 cylinders.I thought that block ,had to do with hyd. cusion for the lift cylinders.I was going back to work on it today,but I want to be able to fix it this time.The owner is very understanding.Still yet,I want to be more noligable about how this system works.Thanks Kent.