Hi Willy, unfortunately I have not been able to find original prints of these diagrams, though I should have brochures packed away somewhere.  I have even been to the factory to witness a test run. Always a very informative experience.  I guess not being able to find them proves my wife’s point that I should throw them out!  So those diagrams are just pictures available on the web.  Obviously not supposed to find them useful, as they do not come up readable, nor do they link to readable pages.  Looks like a great search result until you actually need to read the drawings.  I did manage to read the words at the bottom, and they indicate that the diagram is supposed to be a suction valve on one side of the centreline, and a discharge valve on the other side of the centreline.  It is clear that superficially, they are quite similar.

I labelled the key parts with highlighter pens on one diagram, and on the cutaway.  They are legible on my copy and check with my labels.

Modern valves have two layers as shown, with plates and damper elements inside that open and close as required.  The discharge and suction valves look similar in this view, it is the arrangement of the internals that determine which is which.  Now days there are special provisions to ensure you can’t get them the wrong way around.  Again the result of learning what doesn’t work the hard way.

The retainer cage actually holds the valve in place.  The openings in the side of the cage allow the gas to flow in or out from the valve.  I don’t know whether your machine has those or not, it is possible that the valves are simply screwed in place from the outside with a special tool, then the cap screwed in to seal the outer shell.  Definitely looks like a threaded hole on the outer surface.  The outer covers on the picture I showed are flanged which is now normal on larger machines.

I hope these pictures and explanations help you understand what you are looking at on your machine, even though they are not necessarily exactly the same.  The principle is definitely the same.

MJM460

Hello Kim,

Yes, the lampshade was beaten with a ball-peen hammer and a pad of lead. The copper plate has to be heated several times.
I want to install an E 10 socket there.

Michael

 
The new one certainly has a lot more meat toward the business end!  Hopefully that will do it for what you need 

Kim

Hi "J" , this looks like an interesting project and I will be following with interest.
"W"

I liked the driven intake valve and the version of the Upshur plans that I worked from (bought from the family) had a two cam/two pushrod design so I can't take the credit for the enhancement.

Gotcha, I'd forgotten that version was available separately from the "Red Farm Engine" plans I worked from.