Heidelberg Windmill -disassembling gripper GT1301

My GT1301 was deformed because of an accident,
so I need to buy a new one to replace it.
But I can`t remove it.

Came here to search for the issues that might someone had a same problem :

But I still can`t understand how the topic remove it,please show me the detail or steps to remove it.
Really appreicate for help!

image: side


image: close up

close up

image: gt1301


image: front.jpg


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The part you want to remove is “tapered”. Therefore after tightening screw of puller you must get a large hammer and hit the end of the puller bolt. This will jar the casting off the taper. Make sure the puller is very tight first!