when you had the pins out and the doors off you should have seen marks made by the first set of pins ribs, I think it is possible you have the pin out of alignment with those original slots created by the original pins. The hinge holes have those and the new ones should be lined up with those for the pin to just slide in. Just before the pins are about to go into the hinge at those ribs grab the top or bottom of the hinge depending on which pin it is, one goes up one goes down. Grab the head with a pair of vice grips and give it a slight and I mean slight twist and then try to push the pin in. you must have your pin out of alignment with the original slots in the hinge. because they should go in fairly easily if the are lined up.
Worst case scenario grab a big C clamp and a socket, put the head of the pin under the clamp and the socket on the other end so that there is room for the pin to slide threw the hinge. if you understand that, I know it should just slide in fairly easily with either a tap with a hammer or the clamp method. You really shouldn't have to beat the living crap out of the pin to get it in, as others have said it could damage the hinge if you hit it to hard or to many times with to big a hammer.http://youtu.be/vFkYOTKTFgQ
Technology is great when it works,
and one big pain in the ass when it doesn't
Detroit iron rules all the rest are just toys.
[This message has been edited by 84fiero123 (edited 07-10-2014).]