I am working on heavy duty equiptment with a brake system I am not framilar with. This system is a hydrolic brake system with an upper and lower wheel cylinder. The only bleeder screw is on the lower wheel cylinder in the upper port. If I bleed the brakes here will at the air come out of the upper wheel cylinder. Or is there a specail way to bleed brakes like this. The two wheel cylinder have a small brake line that connects them, I think it goes from the upper w/c lower port to the lower w/c lower port.