help - power steering pump noise

[Solomon Ngan <sngan@netaccess.on.ca>]

Hi guys,
I really need some help here.  I've just purchased a re-built power
steering pump (I believe it is also called the hydraulic pump) from
Linda of Carlsen.  A non-audi shop installed it for me.  What happens
now is that it makes a lot of noise as soon as I touch the steering.
I remember some discussion about "fleeding" the hydraulic system.  Air
may be trapped.  The shop I went to does not know anything about it.

When the shop called an audi dealership, they told him there is nothing
he can do.  It must be a defective pump.  I don't know that's true or
not.  Perhaps the dealership just does not want to help.

With Carlsen's reputation, I do have some confidence in their product. 
Linda said it is directly from factory.

Is there any trick in installing the hydraulic pump ?

Can the hydraulic system be over-filled ?

Can anyone help !!!!

Thanks
Solomon