The hammer is trying to get it back apart.... they are almost impossible to dissassemble once you have needles in the bottom of the cup (they push through the cup and break it .... guess how I know ). There was one yoke here that someone else could get apart that I thought might be tight enough to use. I ended up pushing one of the cups almost through so I could get to it with a 1mm wheel in an angle grinder and cut through the cup, and chisel it apart. They had already broken the base out of the cup. once apart I found the yoke quite munched up, so it must have failed in use.