< Drain System >
I employed stainless steel taper pin for
the drain cocks. The valve bodies are finished
with a taper pin reamer.
The cross hole in the body is drilled and
taper reamed in a jig. Note the hole in the
jig is extended after drilling so as to clear
the taper pin reamer.
The taper pin will be fixed in the valve
body with an E-ring. The photo shows how
to determine the position of the groove for
E-ring. The groove is formed with a thin
parting tool. When turning, the pin is supported
by a brass bar in the tail stock.
The taper pin and the crank pin are silver
soldered in each end of the oval plate. The
oval shape is filed out with two rollers
around the plate as guides.
45 degree cross hole in the taper pin is
drilled with a jig and a triangle.
Drain system assembly. The front and rear
drain cocks are coupled with the connecting
arm. Then the left and right connecting arms
are coupled with the operating levers at
the both end of the stem. The lower stem
is connected to the upper stem with the forked
levers, and the upper stem is connected to
the operating handle in the cab with the
reach rod.
The operating handle is mounted at the right
corner of the firebox where the driver can
accesses easily.
I prepared mockup of the cab plates with
cardboard to check convenience of driver's
operation. If you are right-handed, you had
better place important gears at the left
side of the cab to where you can access easily
more than the right side.
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