Also, you might remove front wheel and try turning whole brake to unscrew from stuck nut.
It's not quite like this, because the brake is not a single unit. Here's a picture from the front with the right caliper removed:
On the right is the left caliper, on the left is the holder for the right caliper, and in the center is the head of a bolt with a hex socket. I think this must be the bolt that goes through the fork to the cylinder nut. I cannot turn this bolt. The part that holds the right caliper appears to have a threaded hole around the bolt, because I can "unscrew" it until it hits the left caliper.
Here it is seen from the right side of the bike:
In the middle is the holder for the removed caliper, and to the left is a nut. This nut appears to also be on the same bolt as everything else. It can be screwed in until it hits the fork or out until it hits the caliper holder.
So it seems to me that what I really need to do is to unscrew the bolt from the cylinder nut. But the head of this bolt is not in great shape and it is thoroughly frozen. I guess I could drill off the head, at which point I'll be able to remove all the brake parts. Then maybe I can hammer the cut-off end of the bolt to remove the bolt and nut from the hole.
But I have a rideable bike now and I'm reluctant to convert it to an unrideable one unless I'm sure I can complete the job.
post edited by Ken Olum - 2019/12/25 07:46:39