forum.audiv8.com Foren English Audi V8 Forum steering and brakes is too hard

I have a problem.
Brakes difficult and the pedal vibrates by pressure.
Pump pressure in norm. But on a cold motor, the rudder is not pivoted.
When the engine will get warm, the rudder all over again can be turned to the left, and then after a while to the right.
I have replaced a bomb, but it not new. As it correctly to test.