Yo team ZD30...

I have a problem with my ZD30. Started to hear a bit of metallic rattle sound at low revs. Inspected today and saw that the fan belt tensioner has oil apparently leaking out of both ends and the fanbelt seems to vibrate more than usual (I can see 10mm deflection when it's running).

So, wondering is it possible for that tensioner that looks like a little shockie to leak? I can get a replacement no problem, but was also wondering how do I remove the tension from the belt to allow me to slip off the fan belt so that I can safely remove the tensioner without it biting me?

Thanks in advance

Steve CAIRNS