A washer? I don't recall seeing one. Unless it is specific to only ABS 4th gens (I have an ABS 5th and a non-ABS 4th). Or are you on about the knuckle ring, but that can only go in one way and doesn't need to be removed to get the drives haft out
Edit - Just looked at the 4th gen manual and there is a spindle washer but that is only on the rear (page 18-31), not on the front.