Accucraft trains Ruby 0-4-0T Kit Assembly Instructions Manual - page 7
Testing the Chassis
The chassis should be tested on compressed air.
This could be from an air compressor or even a bi-
cycle pump. You will have to arrange a temporary
connection between the air supply and the inlet
pipe. Alternatively, you can temporarily install the
exhaust pipe (55) and apply the air there. If you do
it this way, the engine will run backward from nor-
mal (i.e. reverse when the lever is in forward gear).
First, oil all moving parts with lightweight machine
oil. Try running the chassis on about 20 psi air
pressure. The mechanism may be somewhat stiff
at this point and require a little more. Put the re-
versing lever in forward gear (pull the handle away
from the quadrant to move it), then apply the air. If
everything is well, the engine will run strongly and
smoothly in both directions.
The engine may run better in one direction than the
other. If this happens, double check the valve set-
tings on both sides (both timing and adjustment).
Through a process of trial and error, making one
adjust at a time, you should eventually get the
chassis to perform well and equally in both direc-
tions. If things get completely out of hand, readjust
and reset the valves according to the directions and
start again.
Boiler
3-10.
Screw the safety valve (22) and the filler
plug (21) into the boiler (23) finger tight , as per
the drawing. The throttle assembly features a blank
hex head plug on the right side that can be used to
add an optional pressure gauge later. Set the boiler
aside.
3-11.
Put the saddle blocks (50) in position above
the valve block assembly and screw them in place
with four M2 x 3 screws (72), as shown in the draw-
ing. (A) (B) (C) (D) show where the screws attach
to the saddle blocks. If the steam-admission line is
bent upward, gently bend it down so that it is level
or a little below. Screw the two saddle extension
pieces (49) to the sides of the saddle blocks with
two M2 x3 screws (72) each, as per the drawing.
3-12.
Screw the saddle plate (51) to the bottom
of the smokebox with four M2 x 4 screws (3). In
the event that the holes in the saddle plate do not
match up precisely, you may have to open them out
a bit with a small round file.
3-13.
The lubricator (27) must be mounted on the
deck plate. Before you can do that, though, you
must form the steam line. Look at the drawing on
sheet 3 and photo 10 for an idea of what it should
look like. At this point, just worry about the longer
line, the one that will be connected to the steam-ad-
mission line on the valve block. Gently work the
soft copper with your fingers, carefully bending it to
shape. Be careful not to crimp the tubing. Trial and
error will see you through. Eventually the lubricator
should sit flat on the deck and the end of the tube
will mate with the admission line (photo 10). When
this has been achieved, fasten the lubricator to the
deck from underneath with a cap nut (29). Screw
the union nut at the end of the steam line from the
lubricator to the fitting on the steam-admission line.
Hold the fitting with a wrench while tightening the
union nut with another wrench. The chassis is now
ready to receive the boiler.
5