If you managed to get all the bolts out, make sure you got all of them, and you dont have them all broke, and its just the gasket holding it in place, take a block of wood, 2x4 or whatever and place it on the pump and hit it with a hammer, the wood, not the pump. It should come right loose. If the bolts are broken, do the same thing carefully. and use vise grips on the bolt stumps. If you cannot even get the bolts loose, you will probably break them when you try to unbolt it.
If you want good answers, you have to post good questions.. Vague questions will get poor response, or sent to the tool shed.