[LT 72 Jimmy]

I just broke one of the studs on one of my front hubs. I have a 72 4x4 Jimmy with disc brakes in the front. Could someone please give me some simple instructions for changing the stud? I am having new wheels and tires mounted in the morning. The tire place won't change the stud. I am trying to paint some of the hub area before the new wheels and tires. Thanks in advance for your help.

LT