With most doors this process does not go smoothly.
How to install door hinge pins.
Insert the hinge pin into the hole in the stopper assembly from above so that the shank of the pin extends below the assembly.
Then install the lower pin into the top bushing moving and adjusting the door as you go to allow the pins to slide in somewhat freely.
Slide the pin back into the hinge.
Insert the new brass cups into the hinge and then apply plenty of grease inside.
Slide the hinge pins into place and remove the blocks from the door.
Top hinge set of pics.
Once the pins are out knock the brass cups out of the hinge and clean inside the bore.
To seat the serration into the hinge just get out your socket again and place it over the point of the pin.
Taking a hammer and your nail punch gently ram the pin upwards.
Knock the pin back into the hole using a solid base to rest on if the pin is slightly longer allow for the difference to let the bolt seat fully home.
The pins have a serration under the head and this holds the pin tightly in the hinge.
Line up the two hinge plates so that the ones on the door match the ones in the jamb.
The fit is tight and it will likely require some force to complete the installation.
This leaves the stopper assembly.
Hold the door in place using blocks under the bottom to support it if necessary.
This will allow you to press the pin in that last little bit getting it seated fully into the hinge.
Force the pin up from the door hinge.