my old man was hanging off an extension bar about 1 metre long, we had a bar through the back wheel (across the swingarm) and that still did not budge it.
i dont know why Kwak bother with the retaining washer, coz theres not way that sucker was coming off alive.
it didnt even have loctite on it.
with the angle grinder, we put 2 placed cut into and knocked it with a chisel and few times and bobs your uncles brothers sisters brother.
not quite a total butchers act, but it did the job after about 4 hours of stuffing around.