The brake rod usually just has a lug welded to the side of it with a hole in it for the plunger to push into and lock it in place.
Regarding the axle, it's probably worn through or perhaps broken the retainer that sits in the groove in the shaft. Hopefully you don't find any other damage in there.
Regarding the axle, it's probably worn through or perhaps broken the retainer that sits in the groove in the shaft. Hopefully you don't find any other damage in there.