The filing cabinet has two Accuride slides on each side of the double wide drawers:
Trying to figure out how to remove the drawers for moving purposes. Don't have a fork lift on delivery end.
We believe this is a 3620, a pocket and bayonet slide. For those type of drawer slides you have to move the drawer away from the locking tab, then lift the bayonet out of the cabinet pocket. Below is an image so you have a visual reference.
It turned out that the rails disconnected from the drawer by sticking a flat head screw driver between the two, and popping it off the rivets.