Steering gear broken?

Hello dear members, the following on my Volvo S60, (103KW BJ 2001 and key numbers 9101 845), is the following damage, it started a few months ago that the supply tank of the servo broke, so that the tube is broken, then the steering was constantly on the healing because of the air that pulls the system, I immediately fixed it, was 3 months quiet. Now the steering gear oil loses, I guess, however. But the loss is just gigantic, half a liter is gone at a distance of 20km, while steering in the parking lot you can see the tracks, it splashes out. So now I’m also angry. Can a steering tribe ever lose so much oil from today to tomorrow, the damage was not creeping but from one moment to another? Can it not be something else? And my last question could give me some tips about a change in the form of instructions…