Straightforward job. You obviously have to take off the drive belt. To do that, put a 15 mm socket on the bolt that secures the tensioner pulley to the tensioner, and then use it to rotate the tensioner clockwise in order to release the tension on the belt.
Slip off the belt, remove the tensioner retaining bolt from power steering pump support, and take off the tensioner.
Slip off the belt, remove the tensioner retaining bolt from power steering pump support, and take off the tensioner.