2010 Volvo S80 power steering problems
 

So I was driving one day n my pump had died and it felt like I was driving a Miata with a manual steering rack expect much heavier I changed my pump which I bought from rock auto it was by Bosch n I also changed the reservoir I put fluid n turned on the car it still whining but I'm like okay maybe I need to bleed so I did it how it usually works on my other cars by cutting right n then left but still whining n then I was like maybe it needs to be broke in a couple day passed the steering feels good but still whining I took it to a foreign auto mechanic and he said it because it not a oem pump can someone please shine light on my problem this is my first Volvo so I'm not to familiar with them please and thank you
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Jimmy .y

Check any flexi hoses for collapse or restrictions, the whining sound could be the pump is under excessive load due to this.
Hope this helps.