Well, I tried a method to get the stuck inside piston out of the caliper.
I drilled a hole in the center of the backside, then used a drift and bench vise to press on the piston.
The piston moved after some pressure and revealed the flaking chrome plating that was probably the cause of the jam.
It took a bit of work to clear the corrosion and chrome but finally was able to press the piston all the way through the outside bore and out.
I tapped the hole in the caliper with a 5/16" x 18 thread and will use a socket set screw to seal the hole.
Perhaps a better choice of thread/sealing is recommended?
This is a spare caliper I used to try this method, but I would like to put new seals and pistons in and see if the plug holds pressure.
I drilled a hole in the center of the backside, then used a drift and bench vise to press on the piston.
The piston moved after some pressure and revealed the flaking chrome plating that was probably the cause of the jam.
It took a bit of work to clear the corrosion and chrome but finally was able to press the piston all the way through the outside bore and out.
I tapped the hole in the caliper with a 5/16" x 18 thread and will use a socket set screw to seal the hole.
Perhaps a better choice of thread/sealing is recommended?
This is a spare caliper I used to try this method, but I would like to put new seals and pistons in and see if the plug holds pressure.