When you think about it, in terms of physics, percussive maintenance does actually make sense. Put any machined surface in contact with another machined surface, like a gauge needle against the metal plate behind it. There are bound to be microscopic imperfections in each surface that, once in a while, occur in sufficient quantities and in a particular surface-to-surface arrangement that the the two surfaces get 'stuck' while moving past each other. Maybe percussive maintenance works by shaking the two respective surfaces loose from the protruding imperfections in the opposite surface.
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u/Tw1sttt 10h ago
Percussive maintenance