What's wrong with my power steering???

[ssuesens]

I just upgraded from manual to power steering. I bought a refurb pump from the parts store and a gearbox from a site member. Also used an Alan Grove PS pump bracket - very cool! My pulleys seem to line up well and no leaks.

Here is the problem... when we fired it up tonight (after turning wheel to wheel 4 times to purge air from the system) it was somewhat difficult to turn right. Turning left was very easy but there was also a chattering sound coming from somewhere in the engine bay.

What could be causing this?
Thanks