After the trauma of fitting the Coupling Rods this part went relatively smoothly with the exception of a couple of minor things.
First is to fit the connecting rods. This is pretty straight forward, round end towards the piston and
the square end over the crank pin on the rear wheel after fitting a 5BA washer. When you attach the front
end of the rod do not forget to fit the crosshead.
The ends of the rods are slightly bent (cranked I believe is the correct term) so make sure you put them
on the right way. You will notice in the pictures I originally fitted the wrong screws to the front
of the connecting rod, should of looked closer at the diagrams and I would not of made that mistake.
The return crank is next. The instructions goes into great detail on what angle to place them in
relation to the outside cranks but does not mention the return cranks have an inside and an outside face.
Look at the picture below and note that the outside face is level all the way whilst the inside
face curves in a bit.
Do not put these on the wrong way as I did on the right hand side as you will find out after fitting
everything else that they bind and will have to partially dismantle it to fix it.
The next step is to assemble the weigh shaft. This is only pretty straight forward.
Firstly you get the weigh shaft bracket or 'Penguin' bracket (use your imagination)making sure you
have it the correct way round as shown on the diagram and bend the 'wings' in slightly.
Then get the expansion link bush, remove the nut and slide the 'Penguin' on. Push the threaded end of the bush
through the hole in the chasis and tighten up the nut. The 'wings' should be resting on the top edge of the frame
holding it in place.
Before fitting the weigh shaft the book of words recommends checking that the two straight sections
are in line. Mine was off by about 1mm so a minute or so was spent gently tweaking it in line.
Once the weigh shaft is straight you simply slide it through the hole in the 'head' of the 'penguin'
and then bend up and fit the 'penguin' on the other side with the Expansion Link Bush.
Next the pivot pins of the Expansion Links are pushed through the Expansion Link Bushes taking care to put
them on the correct way as there is a left and right hand one.
They are secured in place with a starlock washer which I found I needed pliers to fit.
The eccentric rods are now fited to the return cranks not forgetting the 5BA washer and to the expansion links with washer. Make sure you fit them with the cranked bits as shown in the diagram or it will never fit as I discovered. :-)
Your chassis should now look like this.
If you push the chasis along so the wheels turn you should feel the pressure of the pistons and get a nice satifying chuffing noise as it moves.