I need to know how to bleed the hydraulic lift lines on my older 816. The hydraulic lines have been empty for a few years on an old 816 that I am attempting to resurrect. I filled the reservoir and bled the line at the "out" side of the pump then bled it where the line goes into the control. I know there has to be air in the cylinder and back to the reservoir. How do I bleed that or will it bleed itself when I start the engine?