Noisy power steering after fluid change

[Sportston]

Hi,
Please could someone help me diagnose the noise I get from the power steering on my 2006 1.6HDI Citroen C5 Estate?
I had a minor LDS fluid leak. I replaced the hoses that were leaking, drained the system, and put all new TOTAL LDS fluid in up to the maximum mark. I bled the power steering as per the Haynes manual. But ever since then I have had a strange growling groaning noise that occasionally happens when turning the steering wheel a lot.
I have tried bleeding it again (using an easy bleed, with suspension on max height, engine running, and turning the wheel lock-to-lock repeatedly).
Is there anything else, I should be doing?
Please note, the car never did this before the hose change.

[mickthemaverick]

Since you've replaced all the hoses I'm wondering if one of them is stretching and relaxing under pressure while rubbing on something causing the noise? It is possible that a new hose is over flexi, try refitting the old hose from resevoir to pump and see if that relieves it.

[Sportston]

Hmm. I thought I was careful to avoid that, but I will investigate that further. Thank you for the advice.
I can’t refit the old hose, because I don’t have it anymore, but I will check for rubbing and stretching.

[xantia_v6]

Pump noise could be due to an air leak in the suction hose between the tank and the pump.

[Sportston]

Thank you. I will check that too