Problems with the steering pump S3 8L, help.

Hello everyone, I have problems with the steering pump of my S3 8L. I Have a noise related with the steering pump because the sound increase when I move the steering wheel from left to the right and vice versa, so I have changed the old steering pump for a new one and the problem persist. I dont know how to fix it. Please I need help.

Here you have a video with the problem:

Thanks for all [:I]
Hi, Im sure its not low the fluid level, because de steering pump and the fluid are new and I have checked it.
Did you check the tie rod end as well as any seals to verify that nothing is leaking?