hammer, hmm. if you knew how clumsy I am with a hammer you would have never have suggested that. but, since its the only bit of advice anyones offered me.....
never heard of that make of breaker! should there be a sharp pointy that goes in place of the bit that pushes the plates on? not sure if it's on yours? but ones i have seen the point goes against the end of the pin and screwing it in splays out the end of the pin .