Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I took the cylinder head off to look at the piston and to check the condition of the cylinder bore, and this is what I found,

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Over all not terrible with one exception.  You will notice that there is no port from the steam chest to the cylinder.
The way this was adjusted, the piston completely blocked the steam port when it was all of the way out.  I was able to adjust the piston by screwing it in a little bit using the 2 spanner holes (poorly) drilled into the piston.  I adjusted it so that the port was just slightly exposed when the piston was all of the way out.  I will have to determine a way to check the rear port.

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You rarely see pictures of the bottom;

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You can see where the feeders or risers were placed.

The original builder made a small mistake with a hole placement.

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No problem, plug it and redrill in the right location.

The cylinder is attached to the base with 4 screws.  two from the top and two from the bottom (one missing).

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The Cross head is not bad.

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This Piece is cracked and is not screwed on by more then one thread so I need to make a new one.

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More Later

Jim in Minnesota