The only thing that stops the grinding sound is to add power steering fluid. It lasts for about two weeks and then the noise comes back.
My power steering has a leak. How do I know if its the hose or pump?? on 1999 Toyota Corolla
A good cleaning and adding leak detection dye will prove beneficial. Messy, oily engine components are hard to find leaks in. Call around you local area and see if a reputable shop can help with this service.