94 540i power steering problem

[Unregistered]

Hi all... has anyone ever had a problem turning while braking? I ran my brake fluid low and after topping it off, the brakes work fine, but the steering locks up when braking and turning to the right. I parked in the driveway and turned the wheel to the stops in both directions and there appears to be a spot that feels like the wheel is binding, almost like there's air in the power steering system. Has anyone ever experienced anything like this?

Thanks.

Brian