I always drop the fan off, saves a lot of grief and easy to do with a 36mm open-ended spanner and a mallet to undo the thread.
Remember that it undoes in the direction of rotation.
15mm socket on a knuckle bar to hold the tensioner off and away you go.
I can remember my layout by heart now, but first few times I have to look in Microcat, it doesn't come up in RAVE for some reason.
Peter