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302 ac

  1. 302 AC binding up

    S Scale
    My 302 AC started squeaking and I could see that it slowed down in sync with the squeak. It seems to be the piston that pumps the air to the smoke unit and makes the chug sound. If I move the piston by hand it seems to intermittently rub or bind in the cylinder. I believe I read somewhere not to...
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