The biggest torque setting you'll need is 80nm for the main tensioner bolt. Follow the guidelines carefully for resetting the tensioner. Doing it out of order can prematurely wear the bushings inside.
This is half the reason so many break is because uninformed mechanics or DIY'ers do not do follow the manual at all, or follow it incorrectly and seeing as the bushings are already aged, it just finishes it off.
You don't need to remove the power steering pump though as the manual states. I got away without as shown here:
I
recommend getting new allen bolts since more than likely you'll chew them up a bit. Just remember to crack the bolts with a swift palm hit rather than just using increasing pressure as that'll just strip them then you are in for some fun...The DIY on this site at the top covers the procedure pretty well if you have not reviewed it yet.