On Saturday, June 24, 2017 at 11:30:39 AM UTC-4, wrote:
Bolt appears welded to axle arm. Cannot remove spindle either.

AFAIK, if you're looking at the backing plate and spindle, you've gone as far as you can go without cutting/welding. Assuming the entire assembly didn't get hot enough to anneal/soften the spindle, why do you need to do any more disassembly? Replace or reline the shoes, think about replacing the springs, inspect the bearings/grease seals and replace if necessary, repack with grease, and put it all back together.

Chip Bearden
"JB"