Use a length of hinge pin with the end flattened to open the holes in the hinge knuckles to more easily fit the hinge pin. The flattened pin was chucked in a hand held drill and pulled/pushed up and down through the knuckles. Filed the knuckle ends to open the clearance to better put the hinge halves together. Hinge pin is a tight fit, but coaxed the pin through the hinge.