Power steering leak. Lost all fluid. Pump still making noise

50/50 it either did damage and will go out when it decides to go out. Or it didnt. If it was me id just run it if its working fine and giving no other symptoms.

That said an easy way to rule out air is to pop the cap and shine a light in there and look for froth or bubbles. If you got froth or bubbles, then its air. If you want to fix it. Just drain the system, make sure everything is tight and then flush the system and fill.

 

The one time I lost all the fluid I was in the middle of nowhere Idaho and didn’t have phone service. I patched it up and when I got to Lewiston I needed a pump. I can’t say if it was from losing all the fluid or if it was from me using the only extra oil I had to top it off, which was Rotella 15-40. Lol

 

It most likely overheated and done some damage, but hard to say how much.
I’d change the filter and ride around town 20-30 minutes see how it does.

 

Try a little STP,,, hey, the pump is probably fried anyway, and not the end of the world, but depending on how long it ran dry, best to replace the pump. If it's growling, a bushing or bearing is toast and will take out the main seal complicating matters considerable.

 

what kind of noise? IF it's air, turn the steering wheel all the way hard to the left, then to the right and repeat a few times to move the air out of the steering box. Air in the system sounds like rice krispies. Google air entrainment and cavitation.

 

I had the power steering lose fluid while driving, isn't that big of an issue. Just need to use the armstrong setting.

Highway speeds was really no different than normal. You really have to tug on the wheel when driving slow or moving while trying to park.
I changed my pump when I got back home. The next day a couple hundred miles later.
I'm sure your pump has some damage internal. How bad, not sure. But I am sure there's some damage. Best solution is to change it.

Also if you don't know how to set the stops and poppets. Hire someone to replace it. I installed my first pump and broke it. Thankfully the parts house replaced using warranty. I hired them to put the second pump in. I have been told it is easy to install. I figured it was even easier and cheaper for me to hire it out.
Good luck.

 

Some steering systems can be hard to get the air out of. One of the best was is to put a jack under the steering axle and lift the weight off the tires then crank the steering from lock to lock 3 or 4 times with the engine shut off.
If that does not help then the pump has been damaged and needs to be changed as metal from the pump will harm the steering gear and you will be replacing that as well.

 

That's true. UHaul/moving story. Several( many?) years ago, we rented a UHaul box truck, biggest one they had. Spent all morning loading the dang thing, time to leave, start the truck, oil pouring out the bottom. P/S pump fried. UHaul said they could have someone by in 3 hours, well we had people waiting for us on the other end, I told my gf, let's just run it. It was mostly hwy. and turning was difficult, but we made it. UHaul had the truck towed back.