Vauxhall Insignia Power Steering Pump Problems

I've been hearing a groaning like sound under the bonnet at drivers side where you can actually feel some vibration on the pedals it only happens when you stop it's like something is trying to pump through?? Any ideas? Cars just been in for...

Power steering not work . , -1300 rpm. Steering not electric , only mechanic / pressure. No leaks. oil good.

Power steering failed after turning wheel full lock , replaced power steering pump and steering initially worked while sat on drive after replacement , took out for drive couple hours later thinking it was fixed then instantly failed , no...