They can be very stubborn. A solid surface is your friend. You can try some Penetrating oil and let it soak overnight. A heavy hammer is also your friend. Iirc I used a two pound sledge. A good quality drift punch a little less than the size of the pin and a heavy hammer on a solid surface should do the trick. I think I placed mine over two pieces of hardwood on the concrete floor in my garage. Once you get that rascal out, it comes out easier the next time.
