try TAPING it with a hamer (not to hard!) the shock should loosen it. As for the whole replacing the fuel pump thing goes im living proof of 'ask first' assume later. i replaced the a12 pump with a latter model one and ASSUMED it would be all good. i now have one broken drive arm somewhere in my sump and 2 dead pumps. so dont worry about asking 'dumb' questions on this site. i own a manual and it still didnt help me with choice of pump.