Re: Broken cast iron end of Owen Dyneto generator for 1931 Packard
Posted by HH56 On 2022/8/23 16:43:43
If the 55-6 starter bezels could be repro'd there is certainly a need as I believe it is all but down to finding a good used part now and those are becoming scarce.
The usual failure is the small hooks that hold the ignition switch weaken and distort due to continual pressure from the heavy spring. One or both will be pushed outward and eventually break off at the very narrow point where they join the body.
I am wondering how the piece could be cast with conventional sand casting unless there would be a removable or sacrificial core involved. I would imagine when they were diecast there was some kind of multipart mechanical center that expanded and retracted to clear the hooks and allow the release of the part.
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The usual failure is the small hooks that hold the ignition switch weaken and distort due to continual pressure from the heavy spring. One or both will be pushed outward and eventually break off at the very narrow point where they join the body.
I am wondering how the piece could be cast with conventional sand casting unless there would be a removable or sacrificial core involved. I would imagine when they were diecast there was some kind of multipart mechanical center that expanded and retracted to clear the hooks and allow the release of the part.
Attach file:
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