Power steering problems. Options

[Tech9ine]

It seems like as soon as i fix something on my car, something else goes. This time it's the power steering i believe. As i turn my wheel, there are intermittent periods that lack power assistance and require a significant amount of force just to turn the wheel. At these points i also have to use manual force to turn the wheel back into a straight position. This doesn't happen all the time, just at particular points in the steering radius. (included a picture to illustrate.)

I checked the fluid and it is full, but quite dirty. 'Murky' would be the word i use to describe it.

The belt squeaked last winter, but stopped after some belt dressing was applied. Belt hasn't squeaked since.

Any advice as to what i should suspect is greatly appreciated.

[Tech9ine]

after fooling around some with the power steering pump, I think you are right. I'll have to find a new rack and pinion and throw it on it looks like. Thanks for the help.