wiper pivot dismantle

No c-clip. You'll have to grind off the swaged bit at the bottom. Could be fitted back on then secured with a bit of welding. I've got one disassembled now because the steel shaft is worn and sloppy at the upper bushing. You would think the bushing would wear out first. The thing that looks like it could be a clip is actually a wave washer, along with that there are 2 other very thin washers. Replacement bronze bushings are available although they are slightly longer that the originals.Hope this helps. Cheers
Brian