Damo666 Posted June 22, 2020 Share Posted June 22, 2020 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? I have 2 questions: First is the obvious, how to reconnect the bogies to the circuit board. 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. 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 Link to post Share on other sites More sharing options...
John ks Posted June 22, 2020 Share Posted June 22, 2020 (edited) 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 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 June 22, 2020 by John ks Multiple errors 1 Link to post Share on other sites More sharing options...
Damo666 Posted June 22, 2020 Author Share Posted June 22, 2020 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? Link to post Share on other sites More sharing options...
RMweb Premium Mark Forrest Posted June 22, 2020 RMweb Premium Share Posted June 22, 2020 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. Pick up wires on mine are red, think I changed them when I replaced the pickups. Link to post Share on other sites More sharing options...
Damo666 Posted June 23, 2020 Author Share Posted June 23, 2020 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. 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. 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. 4 short screws and 2 slightly longer and other items. Would you have a scan of the manual by any chance, which might help? Link to post Share on other sites More sharing options...
Damo666 Posted June 23, 2020 Author Share Posted June 23, 2020 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. Link to post Share on other sites More sharing options...
RMweb Premium Mark Forrest Posted June 23, 2020 RMweb Premium Share Posted June 23, 2020 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. Link to post Share on other sites More sharing options...
forest2807 Posted June 23, 2020 Share Posted June 23, 2020 (edited) 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 June 23, 2020 by forest2807 Delete incorrect info Link to post Share on other sites More sharing options...
Damo666 Posted June 24, 2020 Author Share Posted June 24, 2020 (edited) 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 July 1, 2020 by Damo666 remove errant word Link to post Share on other sites More sharing options...
RMweb Premium Mark Forrest Posted June 24, 2020 RMweb Premium Share Posted June 24, 2020 To get the wheels out you'll need to unclip the bogie sideframes; lever with a small screwdriver or similar - same as how Bachmann do theirs. You don't need to remove the body to do that. 1 Link to post Share on other sites More sharing options...
forest2807 Posted June 24, 2020 Share Posted June 24, 2020 Photos as promised - sorry it took so long. Hope they are some help today in getting it back together again. 1 Link to post Share on other sites More sharing options...
forest2807 Posted June 24, 2020 Share Posted June 24, 2020 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. Link to post Share on other sites More sharing options...
John ks Posted June 25, 2020 Share Posted June 25, 2020 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 John 1 Link to post Share on other sites More sharing options...
forest2807 Posted June 25, 2020 Share Posted June 25, 2020 You are right John, mine seems to have undergone some surgery at some point. Hope that solves the mystery of how it all fits together! 1 Link to post Share on other sites More sharing options...
Damo666 Posted June 25, 2020 Author Share Posted June 25, 2020 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. Next will be the buffer beam. 1 Link to post Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now