Replace servo pump

Hello, so after I changed the hoses of the central hydraulics at ABH, I had to fix that the pump had to go out. ==References== Question : I would buy this general overhaul : What do you think about it :

http://www.autoteile.net/new-autoteile-guentige-autoreplaced parts/AUDI/V8+%2844_,+4C_%29/Servo pump/

And then the next question, how do you get the belt down and replace the pump the easiest. The pump seems to be bolted in a mount. I am grateful for all the tips.

Mfg Benni