Here are two ways to try to separate telescoping tubing that has galled
or corroded.
1. Use a medium hammer and tap all around the outer tubing where the
two are overlapped. This shapes the outer tubing to a cylindrical shape
and it stretches it slightly. Use WD-4 or Liquid Wrench as well. This
is an old muffler shop trick, used it many times on race car exhausts.
2. If you can get at the open end of the outer tube, drive a piece of
dowel that is a good fit for the inside diameter up against the end of
the smaller tube. It has to be a reasonably good fit or you'll end up
with the wood stuck inside the smaller tube. Tapping sharply with a
hammer shock loads the joint and can break it free.
If that doesn't work you are left with carefully cutting the outer
tubing in a spiral with a hacksaw so it separates from the inner tube,
then making up a splice with new tubing, including a piece that fits
around the larger tube. Or you can simply replace the larger tube with
a new one at this point.
I mean WD-40, not WD-4, sri. This is one of the secret handshakes of
the Gear Heads, but the reader is authorized to try this at home. No
theoretical derivation is presently available, but some of my graduate
students are working on this as a paper to be published. Yeah, sure!
73 de Dave, W6QHS
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