Great work - you pull the chrome/stainless cap from the splined shaft, try and hold it as parallel as you can otherwise it doesn't want to come off is my experience. Make a mental note or mark the shaft relative to the arm as it will save the trial and error when refitting, it's easy to scuff the screen surround otherwise when the wiper over sweeps.
So the wiper arm just pulls off ?
Not quite...
Loosen the screws immediately next to the three spindles.
This screw is attached to a wedge that pulls the wiper up tight on the wheel box splines.
No need to take them all the way out. Just back them out 2-3 turns.
With the screwdriver still in the screw slots, give the screwdriver a tap back down towards the scuttle with the palm of your hand.
This knocks the taper wedge back down and away from the wheel box spline
Angle the arms up 90 degrees against the tensioning springs as previously mentioned
