Please Help!!!! 8 1/4 Reaend Teardown

Hi Guys and Gals - 1st time I am tearing down a 8 1/4 rear end and I cant figure out how to pull the centre pin out shown in the picture. I pulled the bolt out that was on the side but can't figure out how the pin comes out. Is it just pushed in or is it threaded in?
Thanks
Dwayne

Attached Images
 
Author: admin