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ViTrains Class 37 Wiring help request


Damo666
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I bought a 2nd-hand ViTrains Class 37 loco at auction which is a non-runner. Removed the body and found all the bogie power cables were unsoldered. I think the previous owner was a careful modeller, all the parts seem to be in the box and the wires were not cut but unsoldered.

 

Would anyone have a ViTrains wiring diagram for the ViTrains 37422, model #2020, please?

1685942023_2020-06-2207_59_00v2.jpg.27bb0723bc216cef74ea84948bbc406f.jpg

 

I have 2 questions:

First is the obvious, how to reconnect the bogies to the circuit board.

1153156119_2020-06-2208_00_54v2.jpg.aea082457dde42849c318625befb9c49.jpg

 

1568036689_2020-06-2208_00_26v2.jpg.6a84260479f1a5997a2124d07725ce33.jpg

 

I think I have the answer to this, Bromsgrove Models have wonderful clear pictures here, but would like to double-check as I know that ViTrains had at least 2 versions of this model and the circuit board may be different between models. I have Model #2020.

 

My second question is what are the two light units, each with 3 wires? I cannot see how these might fit within the loco front. Are they for this model? Otherwise there are no lights on this model.

 

1140367620_2020-06-2208_01_25v2.jpg.65ce34395183274c74a48e3a3e34797e.jpg

 

334250340_2020-06-2208_06_29v2.jpg.96e11bf05eaab63b58b9ab23d8eba9c5.jpg

 

The Bromsgrove link above shows a red, black and blue set of wires coming off the circuit board. Is this for the light cluster?

What is the wiring configuration at the other side of the circuit board? and

How are the fitted in the loco body?

 

Many thanks

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I have coloured the PCB tracks to NMRA standards (Edit forgot this was DC but tracing the PCB tracks helps to show what pads do what)

Assuming the front of the loco & pin 1 on the DCC socket is as I have added to the pics

The pics should explain all

The small LED boards look to be wired

Red wire to Red LED

Black wire to the White LED

Blue wire common to both LEDs

 

1543748871_via2.png.399a316f0cc4d9de2f46e003ddc88102.png

 

 

If I was doing this I would connect the LED boards as I have drawn, plug in a decoder (edit forgot I was in the DC section )& test the loco without the body 

You should have a rear red LED & a front white LED on when going forwards

If not then transpose the red & black wires (to the LED board) at one or both ends as required

 

 

 

I cant help with assembling the loco 

 

 

John

 

Edited by John ks
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1 hour ago, John ks said:

I have coloured the PCB tracks to NMRA standards (Edit forgot this was DC but tracing the PCB tracks helps to show what pads do what)

 

......

 

If I was doing this I would connect the LED boards as I have drawn, plug in a decoder (edit forgot I was in the DC section )& test the loco without the body 

 

John

 

John, thank you for your clear and concise reply, that will be really helpful for me.

 

I will be adding a DCC decoder in due course, but the first step, as you rightly say, is to make sure it works on DC first.

 

I'm beginning to wonder if there is some clear plastic insert missing that refracts the light from the LED to the appropriate 'lights' on the front?

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Do these help?

144FE5F6-E989-4AB7-9E1D-75C09A35DAD9.jpeg.2064fc84f45bd4f88dc6963c663b0125.jpeg29CC80EB-3BDB-4075-A656-3585E09A2066.jpeg.ca4ab1068d8c2a4d5e0c6d4da2673be7.jpeg

 

The lights fit to the chassis, in a black plastic shroud in front of each cab.  Looks like you are missing that bit, but shouldn’t be difficult to make from some scraps of plastic.

5AD3969E-2C88-4E8C-9AC6-AD357AF65B91.jpeg.92919762e9bc0a3daef0a10372ea83e4.jpeg

Pick up wires on mine are red, think I changed them when I replaced the pickups.

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18 hours ago, Mark Forrest said:

Do these help?

 

 

The lights fit to the chassis, in a black plastic shroud in front of each cab.  Looks like you are missing that bit, but shouldn’t be difficult to make from some scraps of plastic.

5AD3969E-2C88-4E8C-9AC6-AD357AF65B91.jpeg.92919762e9bc0a3daef0a10372ea83e4.jpeg

Pick up wires on mine are red, think I changed them when I replaced the pickups.

 

They certainly do. Thank you for taking the time to provide me with clear images.

 

I have a bag of loose bits in the box, so this explains some of them.

1001818984_2020-06-2208_04_07v2.jpg.9f34edc9c3f18f2fb322e03718e9d36d.jpg

 

The cab interior, buffer beam and black plastic shroud are all there. (You seem to have a divider in the shroud).

 

The foreground items are the only things I haven't identified. There are 4 small springs, but only place for one.

 

Capture.JPG.e65ab238219c2e63e2261a0b2004cb9f.JPG

 

4 short screws and 2 slightly longer and other items.

 

Would you have a scan of the manual by any chance, which might help?

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I vaguely recall the couplings having springs attached to keep them centred, but chopped them off mine so can’t be sure.  Do the long sort of Y shaped bits fit into the chassis and the coupling attaches to them.

 

No idea what the parts under your pen tip are, don’t recognise them at all!  Divider for inside the light shroud is between the LEDs in your earlier photos.

 

sorry, I’m rubbish at keeping copies of manuals so can’t help there unfortunately.

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The parts under the pen tip are to secure the coupling holder in place beneath the chassis frame, just behind the bufferbeam. I can post photos later, unless someone beats me to it.

The springs attach to the little spigots on those unusual looking parts, and the other end of each spring attaches to the ‘V’ shaped top of the coupling holder.

Edited by forest2807
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On 23/06/2020 at 17:51, forest2807 said:

The parts under the pen tip are to secure the coupling holder in place beneath the chassis frame, just behind the bufferbeam. I can post photos later, unless someone beats me to it.

 

Please, I would appreciate that.

 

I've had a good day soldering the bogie pick-ups and LED light clusters to the PCB and all working well.

 

I like 3D puzzles but I'm struggling to see how these parts go together. The piece my pen is pointing to ('under bufferbeam part') seems to go under the bufferbeam but the spring (at the tip of the pen) is not correct.

 

Also, would you know how to remove the wheels from the bogie? I cannot see how this might work, or do I have to remove the body and then the whole bogie from the chassis to access it?

 

Thanks

 

Edited by Damo666
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4 hours ago, forest2807 said:

The part(s) that your pen is pointing at don’t seem to be what I initially thought they were, having compared your photos with mine. I’m not actually sure what they are.

If you mean the "parts" indicated by the arrows Then it looks like someone has done a bit of surgery on yours 

The bottom LH image shows Damo666's  part with a bit of digital butchery, now they seem to match

 

The next bit is a guess & could be completely wrong

With the surgery the done, the "part" can be installed with the springs installed as shown

Without the surgery the springs would need to be installed after the "part" is mated with the buffer beam

 

 

1058717168_viarail.png.094e7edc4f7c0138f14dcacae7f2b73d.png

John

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On 23/06/2020 at 11:08, Damo666 said:

Just a huge thanks to @John ks and @Mark Forrest for wonderfully detailed explanatory replies that doesn't require further deciphering.

 

Simple, concise and very much appreciated.

 

Thanks again, all wired, lights working correctly and end cabs plus shroud assembled.

 

260271531_2020-06-2411_03_28.jpg.c6a9b74dc953895084f48c98fe5b69d5.jpg

 

Next will be the buffer beam.

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