Power steering issue

Hello all. Turning to this forum for advice as I don’t know how to troubleshoot my issue further.

recently my power steer pump have been making and awful noise and gets very very hot. Like making the oil smoke hot. I turn the car off before anything real bad happens but I’m really stumped on how to fix this issue. I’ve replaced everything and the new pump, still does the same thing. Old pump never broke but I replaced it as a precaution. New pump new lines. New rack.

Is there a line I should disconnect to know for sure the pump is primed. Is there a way to put vacuum on the system to suck fluid through it all?

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