Is the idea to have the electroplater build up the pistons slightly oversized and then have them ground or turned back to the correct diameter?
I’m also wondering if the replating route doesn’t turn out to be an option could those pistons be turned down in a lathe and sleeves made up to bring them back up to the correct outside diameter.
I think your idea of drilling and taping the four raised points where the motor was originally swagged on, and using a spacer block and retaining band to hold the motor back on would work fine. It wouldn’t need to be a very deep threaded hole to hold the bands down and work.
All of this work falls under the heading of experimental, but often good fixes and repairs come from it that may be helpful to others in the future. Let’s hope for some good news from the electroplater.
I’m also wondering if the replating route doesn’t turn out to be an option could those pistons be turned down in a lathe and sleeves made up to bring them back up to the correct outside diameter.
I think your idea of drilling and taping the four raised points where the motor was originally swagged on, and using a spacer block and retaining band to hold the motor back on would work fine. It wouldn’t need to be a very deep threaded hole to hold the bands down and work.
All of this work falls under the heading of experimental, but often good fixes and repairs come from it that may be helpful to others in the future. Let’s hope for some good news from the electroplater.