DOH said:Brian- You should have posted this as a separate post, rather than hijack Welsh Dave's , which is on a completely different topic, to yours. In future you will achieve faster replies as people on the forum will be aware that someone else has a different problem to solve.
Anyway, leave 1he 13mm nut on loosely onto the spindle (This prevents you damaging bonnet or smacking yourself in the face when it comes lose). Lift wiper off from screen 90 degrees,yes do use WD40 on the spindle, using the straw with the can, now wiggle the wiper arm side to side a few times & then pull vertically up. It will lift off and then remove the 13mm nut :thumbs:
Though I would answer the question in the How-to section for if someone else has the same problem in the future. With that this topic will be full of information about the 'Front wing removal' instead of load of separated topics about one subject.
Sorry about the hijacking, Didn't meant to hijack anyone's topic. Sorry Welsh Dave