[Engine] 1.9d XUD auxiliary belt tensioner

[Jaques_Schitt]

Hi again
Just a quick question, how is the spring loaded aux belt tensioner removed on the 1.9d multispace? Seems to be pivoting on a central nut but cant see any other bolts from the top/side. The last garage I took it to replaced a perfectly good tensioner with a nasty bit of crap from china.  Its got side to side movement now and never fitted the belt correctly in the first place. 

ANy guidance would be appreciated ta. Its an x reg. 2000.

[Jaques_Schitt]

UPDATE I found out the tensioner is just held in with one centre bolt. No problem there but the reason it had failed in the first place is because THE TIT AT THE GARAGE FORGOT TO TIGHTEN THE CENTRE BOLT UP and left it loose.