I cleaned up the rear hubs as best I could. I didn't get the hub off the drum, but when I thought about it, there probably wasn't much point in doing that anyway. I installed new wheel studs and got new nuts since some of them had smashed threads and weren't in good shape. I took the brake shoes to a local tractor repair shop and had them reline them. I replaced the brake cylinders and cleaned up all the internal parts. The wheel bearings were in good condition, so I just cleaned them up and packed in new grease. Once it was assembled, the brake cylinder ends were rotated to adjust the brake retraction just until there was a small amount of drag. I didn't do anything to the parking brake cable other than free it up and try to clean it up. I didn't replace it or pull the cable out of the sheath to clean it. I suppose that's something that I can do later if it becomes an issue.