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

I've worked on a number of these over the years, so I can't remember exactly which version is which. But, I would start with finding part numbers and hitting Google. There are a number of catalogs available online that show the components and in some cases very nice service instructions. It sounds like your version may be one of the earlier ones where the brake backing is integral to the spindle. It may not in fact be possible to remove.

Of course, Spindleberger is probably the best bet...

P3