Profile view of the DEV Dd4s van

Roco DEV Dd4s raised, interior fittings and lighting.

What is there to change about this van?

In fact, there is more to add than to modify: there is no interior fittings. Even though they are hardly visible, they are conspicuously absent, in particular by the roller shutters and the conductor compartment.

On the other hand, the vehicle is too low by almost 1 mm. It will therefore have to be raised.

Although this is not currently planned, this van would also benefit from being equipped with thinner footsteps and more compliant bogies. Anyway, I will fix the steps of the conductor compartment on the bogies.

Finally, I will install interior lighting as well as tail lights, as I do on Jouef vans.

Disassembly of the van

The body can be disassembled quite easily. Just spread the sides slightly and pull the chassis out with one of the boxes under it. To avoid them to be damaged, it’s better to remove the steps. Remove the bogies. Unclip the drawbar covers, which will not be reused. Pop off the clips that hold the ballast and remove it temporarily.

View of the dismantled chassis

Close-up view of the dismantled chassis

To the left of the chassis is the Jouef one also under construction. Compare the thinness of the photoetched steps mounted on the Jouef and those of the Roco… As well as the thinness of the buffers (Trix PBA vs. Roco). You can see the frankly ugly partition embryos that will have to be removed.

In the body, I remove the end glazing in order to install the lamps.

Raising the chassis

Although in theory I need a 1 mm raising, I am happy with 0.7 mm. A test will show that only 0.5 mm to the 1-point suspension point end.

Raisong spacers

I forgot to say that I replaced the ø 11 Roco wheels with ø 10.4 micro-modele wheels.

The pivots are hollowed out by about 1 mm from the top to give the bogies some clearance.

Hollowing the pivots

Let’s compare the result with a REE UIC coach from, successively coupled to both ends of the van.

Comparison of height with REE UIC

Comparison of height with REE UIC

The height is increased to 45.15 / 45.20 instead of 44.30 / 44.50 initially, depending on the end, for a scale height of 45.29. The result is very correct both at the buffer and the UIC bellows level. On the other hand, the green colour of the van which pulls a little on the spinach is not very convincing…

Mounting of the small steps on the bogies

The only way for the van to be able to run with the small steps fitted is to attach them to the bogies rather than to the chassis. This will be done with two ø 0.4 piano wire pins. The distance between the pins must be 6 mm.

First, let’s drill the steps. Behind the top step there is a cylindrical moulding which seems ideal for this. The step is fixed in the vice with a 2.5 mm thick support inserted between the two steps.

Click the photo for a closer view.

Drilling of the step

Drilling of the side beams.

Click the picture for a closer view.

Drilling the side beams

ø 0.4, 5.2 mm long piano wire pins are inserted flush with the inside of the beam. Gluing with CA (front and back).

Click the photo for a closer view. Note that the pins are chamfered.

Inserting the pins

Assembly of the steps. You can see that the holes have been drilled through the step. A little putty will correct this.

Click the photo for a closer view.

Assembly of the steps

Interior fittings

This layout will not be very detailed. A simple evocation will suffice. The dimensioned diagram is given in this PDF document. The whole is made of 1 mm thick plastic card.

Preparation of the chassis

The chassis has, as already mentioned, pseudo-partitions that have to be cut out, keeping small protrusions similar to the others to hold the glazing in place. The same goes for the tenons that held the ballast: the surface must be as flat as possible. The flush dimension corresponds to the ballast thickness

Cut-out chassis partitions

Hover over the image to see the details.


Here are the cut parts.

Cut-out parts of the interior fittings

We check that the base of the fitting fits correctly into the chassis. It perfectly plays the role of holding the drawbars in place.

Chassis with interior base

The main wall (along the corridor plus both ends) is in one piece. The inner corners are milled at 90° to about three-quarters of the thickness, see in the medallion. The piece is then carefully folded, glued into the corners (liquid model glue) and held in place with adhesive tape while it dries. Small partitions are then added. Finally, the whole thing is glued to the base.

Gluing of the partitions

It is possible to paint these fittings: light beige seems appropriate to me.

Roller shutters

The roller shutters are represented by household aluminium stuck on a double-sided adhesive, grooved every millimetre with an empty ballpoint pen. Once the sheet has been drawn, it is cut to the correct width and to a height twice that of the wall. The shutters will be glued astride the wall.

Finished interior fittings

Finished interior fittings

Hover over the image to see the details.
Note in particular the roller shutters and the pieces of double-sided adhesive glued to the ballast that has been put back in place, intended to fix the fittings


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