DIYbanter - View Single Post - Steam Engine Valve Gear driven by Steam Pressure?

wrote:
I bought an old model steam engine at an estate sale today, and I am
puzzled by the valve gear. There is no mechanical connection between
the crankshaft and the valve!

The steam chest has a shaft protruding from the fore and aft - these
will slide in and out. Haven't gotten it to run yet - I would like to
try to find out more about it before dis-assembling.
I'm no expert on steam, but I get the strongest feeling that there is
SUPPOSED to be a link to that shaft on the steam chest. Is there
anyplace on the flywheel or the crosshead that the valve could be linked
to? Is there anyplace on the mounting board where something else once
went, like the reversing gear?

Jon