MF 231S power steering leaking

[fireman4074]

I have MF 231S. It has started leaking from ps pump where the red circle is and on the steering section. I have top off with fluid while I’m using it. When I get ready to take fill screw off, a lot of air come out every time. Also when top off, it will make whining noise when turning it either direction. What can cause leaks and is it easy fix???