Shay Cab - Shelf &
Nelson Riedel Nelson@NelsonsLocomotive.com
Initial: 11/11/03 Last
The plan was to go back and add to the first Cab page as
additional work was done on the cab. However, it is now clear that the
design of parts of the cab are heavily dependent on the
layout of the plumbing and it is normal for one to fabricate sections of the cab
in coordination with construction of other areas of the locomotive. The new plan for the Cab documentation is to cover the cab
in the following three short pages:
This is the page devoted to the shelf and platform. These
parts are integrated with the plumbing because the brake valve and whistle valve will be located on the shelf and the atomizer
regulator will be located under the platform. From a maintenance point
of view, it is desirable to be able to access each piece of plumbing without
disconnecting other plumbing. For example, one wants to be able to access
the plumbing under the cab floor without disconnecting the brake and
atomizer plumbing. Conversely, one wants to be able to get
at the brake and atomizer plumbing without disconnecting any of the water or
steam plumbing. These concerns have led to the following
cab disassembly features:
The cab front, sides and roof can be removed as a unit
without disturbing any plumbing. Once the 8 screws are removed, the cab can be lifted off vertically.
The cab floor can be removed after the cab front and
sides have been removed by taking out an additional 7 screws,
sliding it back about one inch and to the left about 1/2
There are screws from the cab front and sides into the
platform/shelf unit. However, the platform is also anchored to the frame via the
reversing gear stand so that is supported after the cab sides and front
as well as the floor have been removed.
Access to the atomizer regulator ( a likely high failure
rate component) is via the cover over the platform. That cover can
be removed without taking out any other parts.
|Photos of Cass Shays: Photos of some of the Cass shays were
reviewed before starting the platform and shelf. This is
a photo of the shelf on Cass 5. They were doing
maintenance on the locomotive when this photo was taken; that's
probably not the normal storage location for the tool box.
|This shows the back of the shelf on Cass 5. Plumber's
|I couldn't find a photo that shows the overall platform over the
reversing gear on Cass No
5. This is the platform and engineer's chair on Cass No11.
|This is the side of the platform on Cass No 5, taken to record the
platform height (On the original uncompressed photo it's easy to
read ---- 17" high).
|The Cass No 5 platform width --- 34"
|The Cass No 5 engineer sets on a box rather than the fancier seat
with back on Cass No 11 shown earlier. I didn't look in the
box but suspect it holds lunch, coffee & donuts, roadmaps, etc.
|Shelf & Platform: The shelf and platform were
fabricated from ~0.100 thick HR sheet steel. The brass fitting in the
photo is a prop to hold the shelf horizontal for the photo. The shelf top and back were made first,
fitting between the cab front, cab side, and the boiler.
Pieces of 1/8" square rod were silver soldered to the edges
next to the cab front and side edges to give sufficient width for
Holes for #1 button cap screws were drilled and tapped in four
rivet positions near the corners. The self top and back
were silver soldered together.
The platform cover and outer back were also silver soldered
|This shows the platform cover in position. There are
two platform backs, the inner one attached to the platform side and the
outer one attached to the top.
Silver soldering tip: The assembly was put together a few pieces
at a time. The pieces were held together with 1/16"
roll pins for the silver soldering. For example, the 1/8"
rods were first soldered to the shelf top and shelf back and then
the top and
back were soldered together in a separate
|The platform side is attached to the reversing gear stand with a
couple # 4 screws.
The platform side and the shelf back were joined using screws
through a short piece of 1/2" angle. After the assembly was
installed and adjusted as required, the assembly was removed and the
joint between the platform side and the shelf back was silver
|The shelf is attached to the cab with screws through the cab front and side using button
head cap screws that look like the rivets.
|This shows the inside of the cab with the platform top
|The platform top is in position here.
Comment: The shelf is much thicker than the cab front and
side because it must remain rigid when supported only by the the
platform side screwed to the reversing gear stand. The
edges are not visible so the extra thickness is hidden. The
platform on the prototype is made from wood so the 0.100" plate
is roughly to scale.
Holes have been cut in the cab floor and then the configuration
changed so that some holes are no longer needed.
Also, the cab floor ended at the back of the boiler. It now
appears that a better design would be to run the left side of the
cab floor up to the front of the cab. A new cab floor will be
made after the locations of all holes are firm. (This is one
area where I don't want to follow the prototype by putting little
patches over unused holes.)
The next step is to mount the atomizer regulator in the platform
and to work on the burner.