1991 pickup leaking PS fluid

91 Toyota Pickup 4X4 SR5 107K miles
Leaking fluid from ABS/Power steering fluid device ( don’t know exact name). Little vent tube that sits on top of frame.
I have done some work . Replaced both power steering lines, pump , gear box. Flushed PS fluid twice
Did some research and came across a 4Runner form . Guy had similar issues. He was told to bleed the rear brakes. I went ahead and flushed the whole system with fresh fluid.
Start truck up and I’m still leaking fluid out of that little vent tube.
Is there something else I need to do?
I’ve tried to research this out more , but there’s not much info on this device leaking. From what I see part isn’t available. So it must be pretty reliable I guess
I’m lost . thank you for your help

 

Please Post some pictures.

I have no idea what your trying to describe .

 

I won’t be home today. I don’t know the exact name. It’s a Device on the passenger side frame . Power steering lines go into and also I guess it’s part of the ABS too.
little vent tube on the bottom front dripping PS fluid.

 

When ever you get time!! I really have no idea.

Power steering and Brake fluid should not mix that is what has me baffled .

 

It’s the brake actuator. Sorry I haven’t gotten back in .

 

I have basically replaced everything except the power steering control valve

 

If you look at the 2nd picture taken from below. You will see a rubber breather tube. That’s where it does a consistent drip of P.S. fluid

 

Well . Finally found the time to install power steering control valve , and still has a drip from the breather tube on the brake actuator.

 

Any help out there?