Hey guys, I’m in the process of replacing the ring gear and worm shaft in a big old Northern machine. The Machine type is a 450 geared machine, 12,500lb capacity. I can’t seem to find any useful technical info on how to set up the gear set, backlash etc. Or any tricks or tips to getting the worm shaft out of this ole girl. She’s big and heavy, just wondering if anyone has any experience with one of these machines.