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By Kmfg. (anonymous) | Posted November 02, 2014 at 19:29:35
Steam engines, especially large ones, should be run on lubed steam and only that. Compressed air or electric turning do not expand the cylinders or valve cages to thermal expansion design dimensions, and compressed air does not carry an atmosphere of steam oil like steam does. Running these engines on anything but steam would be highly inefficient and irresponsible and inevitably damaging to them.
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