Removed Power Steering screen, now whines when driving

The power steering reservoir screen was clogged, causing a whining and screeching whenever I turned the wheel, so I removed the reservoir, opened and cleaned the inside, accidentally broke the screen off, then replaced and flushed the PS system. I added an in-line magnetic filter to the return line to replace the broken screen.

When the truck idles, it's silent. I can turn the wheel to full lock and it doesn't make a sound. But when I'm driving around, I can hear a whine from the the power steering pump, even when driving in a straight line. I had a friend rev the engine while I looked into the PS reservoir, and the fluid swirls faster when the engine speed increases (which makes sense given the pump is driven by the engine).

Above 2000 RPM the fluid in the reservoir forms a vortex, and I think air may be entering the system that way, like in your bathtub when you pull the drain. Maybe the screen broke up the flow of fluid, and now it's not there to stop the vortex?

Has anybody who's removed the screen from their power steering reservoir had the same experience?

 

It helps prevent aeration from the agitation the fluid receives from the pump, pressure and heat.

It's like the screen before the mass air flow sensor, simple things do a lot if you think about it.

Time to hit the wreckers!

 

You could probably get away with using one of those heavily porous scotch brite pads, or maybe a steel wool brillo pad. Just kinda cut it to shape or form to shape, whatever. We're you positive on getting all the air out of the lines? There's a fairly easy procedure for this.

Edit: nevermind, thought crossed my mind that what if a piece of the new 'filter' material breaks off and moves downstream of the reservoir? Yeah, prolly not a good idea. My bad.

 

I'm going to make a plastic insert for the reservoir that should (hopefully) slow down the movement of fluid.

 

save yourself some time and energy and just buy a new reservoir