Accucraft trains Ruby 0-4-0T Kit, Assembly Instructions Manual

rod end. The set screw that is installed in the main 
rod must seat in that dimple to hold the piston rod in 
place. Carefully remove the set screw.

With your fingers, rotate the piston rod so the dim

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ple is facing downward. Align the large hole in the 
crosshead with the end of the piston rod and ro-
tate the wheels, bringing the crosshead into contact 
with the piston rod. The piston should slide into the 
crosshead. Push it in all the way. Looking at it from 
the bottom, you should be able to look through the 
threaded hole and see that it is aligned with the dim-
ple. When this looks good, screw in the set screw. 
Now, when the wheels are rotated, the piston rods 
should move in and out of the cylinders.

3-4.

 Place the two sheets of gasket (45) on top of 

each cylinder, aligning the holes, as per the draw-
ing. The gaskets should be very oily. If they are not, 
put some lightweight machine oil on them. This will 
help them seal better. Then place the valve as-
sembly (47) on top of the cylinders, sandwiching 
the gaskets in between. Screw the valve assembly 
tightly to the cylinders with eight M2 x 14 screws 
(48). The chassis should look like photo 5 at this 
point.

3-5.

 Screw an M2 nut (38) onto the long end of the 

reversing rod (44). With your fingers, carefully re

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move the reversing valve from the valve assembly. 
This is the one in the middle. Screw the short end of 
the reversing rod all the way into the threaded hole 
in the reversing lever on the reversing quadrant 
(39), then back it off a half turn or so. See photo 6. 
You may optionally add an M2 nut (38) to hold the 
rod in the quadrant lever.

3-6.

 Screw the reversing quadrant (39) to the deck 

plate with two M2 x 4 screws (3), as per the draw-
ing. If the screw holes in the deck plate have paint 
in them, the screws may not go in easily. If this is 
the case, clean the holes out by running a screw 
into them by itself. Take it slowly so that you don’t 
run the risk of twisting off the head of the screw. (If 
the screw won’t start from the top side, try it from 
underneath.)

Adjusting the reversing valve. On the reversing 

valve itself is a very fine groove approximately 3/8” 

from the rear end. This is and adjusting aid. When 
the reversing quadrant is in the forward position, 
the groove should just be touching the valve block. 
If it isn’t, the valve can be adjusted in two ways. 1) 
The screws holding the reversing quadrant can be 
loosened and quadrant slid in one direction or the 
other to achieve the adjustment. 2) If this doesn’t 
work, the valve itself can be screwed or unscrewed 
along the reversing rod until properly adjusted. 
When proper adjustment has been attained, secure 
the valve to the rod with the nut.

3-7.

 Take a rocker-arm assembly (32) and slide it 

through the hole in the frame from the outside and 
into the rocker arm attached to the eccentric rod. 
The arm inside the frames should point down and 
the one outside, up. Fasten them together with a 
set screw (33) through the hole in the inside rocker 

arm. The set screw should engage the flat space on 

the shaft. There should be a slight amount of free 
play in the shaft so that it can move freely. Repeat 
on the other side. See photo 7.

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