you can pull off the whole whole shaft by taking the clip off the back i think. Or if you leave the shaft in place you can take off the big nut and the pulley unit will slide off the shaft. dont take the clip off the front it will make the springy part fly apart and you will have to reset it.
That's where I'm having the issue. I know from watching assembly videos if I pull the nut off the front I can slide the shaft out but the issue is I can't figure out how to stabilize the rear pulley so i can torque down on the nut