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 Posted - April 05 2021 : 11:21:11 PM
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So, I was running my Rivarossi 0-4-0 Docksider not too long ago, and it suddenly stopped. I have taken it apart and put it back together several times since then, and I have no clue what is happening. When I apply power in either direction, the light comes on, but there is no motor movement or sound. However, when I apply direct power to the motor from 2 wires, it runs perfectly fine (note: it was running fine before it suddenly stopped.)
Yes, the insulated wheels are on the right side. Yes, the wheels are fine/quartered.
Does anyone have any advice on how to fix this?
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in Heaven." - Matthew 5:16
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Posted - April 07 2021 : 1:15:03 PM
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| And how do pick ups look?
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Posted - April 07 2021 : 1:21:34 PM
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What kind of gearing does it have?
Aaron Anderson
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Posted - April 07 2021 : 3:20:19 PM
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From the wipers on the insulated side drivers to the motor, there is a wire. It's separate from the wire to the light, so if the light works, but the motor does not, and the motor works when power is applied directly to the motor, that pretty much leaves that wire as the weak link. Check if that's properly connected at both ends, and if so, whether it conducts electricity (it could be broken inside the insulation).
Another possible, but unlikely, point of failure would be if the mounting screws for the motor are loose, making for a weak ground to the chassis.
Carpe Manana!
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Posted - April 07 2021 : 8:56:09 PM
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Pick-up (or really one) is fine.
The gearing is a simple set-up, just a worm gear connected to the motor, that interlocks with the circular gear on one driver.
shaggy, I didn't even think of checking the wire....it may very well be broken inside, because I know it is connected to the pick-up wiper fine, but it may be loose to where it is connected on the motor. I will check this as soon as possible. I will also investigate the mounting screws.
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in Heaven." - Matthew 5:16
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Posted - April 09 2021 : 05:56:09 AM
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| Keep us posted. Interesting thread.
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Posted - April 09 2021 : 07:06:45 AM
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quote:Keep us posted. Interesting thread.
Originally posted by Chops124-April 09 2021: 05:56:09 AM
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Will do. I'll be working on it this weekend, since I'm off work. 
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in Heaven." - Matthew 5:16
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Posted - April 09 2021 : 7:57:01 PM
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| Yay! He finally got a day off!!
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Posted - April 13 2021 : 12:37:59 PM
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Update on the Docksider - So, I soldered a brand new wire from the contact piece to the motor, replacing the original black one. After putting the chassis back together and inside the shell, I tested the motor again with 2 wires (one from the contact piece and the other to a brush spring) and it ran with no problems, like normal. I then installed the driver/wheel assembly, but without the bottom plate - tested it the same way, and the motor ran fine again. I screwed the bottom plate back on, tested it once more with the 2 wires, and it didn't run. (0__/\__0) So, what do I do now?
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in Heaven." - Matthew 5:16
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Posted - April 13 2021 : 1:27:40 PM
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Is there any bare part of the wire that might touch the cover plate and cause a short? If so, a piece of tape on that might solve the problem. Otherwise, the only other thing I could think of is if the axles are somehow pinched so that the motor wants to turn, but the whole mechanism is bound.
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Posted - April 13 2021 : 9:13:00 PM
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quote:Is there any bare part of the wire that might touch the cover plate and cause a short? If so, a piece of tape on that might solve the problem. Otherwise, the only other thing I could think of is if the axles are somehow pinched so that the motor wants to turn, but the whole mechanism is bound.
Originally posted by scsshaggy-April 13 2021: 1:27:40 PM
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I'm thinking that the plate is causing a short...I don't believe the wire touches it, however. I'll investigate further.
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in Heaven." - Matthew 5:16
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Posted - April 13 2021 : 10:43:10 PM
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quote:I'm thinking that the plate is causing a short...I don't believe the wire touches it, however. I'll investigate further.
Originally posted by RP model railroads - April 13 2021 : 9:13:00 PM
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It also occurs to me that since the pickup wipers are mounted on that plastic block that sits in the frame and is held in by the cover plate, the cover may be pushing up on it in a way that causes the wiper or where the wire attaches to somehow touch the frame. An experiment might be to run it without the cover plate and then press on that block and see if it shorts out then.
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Posted - April 14 2021 : 8:34:03 PM
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Here's a short video I made explaining the issues. I thought it was the plate, but.....is it the screw? I am so confused now.
https://youtu.be/Eob49q2cfBU
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in Heaven." - Matthew 5:16
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Edited by - RP model railroads on April 14 2021 8:35:38 PM
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Bamos
Big Six
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Posted - April 14 2021 : 9:01:21 PM
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The screw may be shorting against the wiring for the light. is the insulation okay on the leads to the light?
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Posted - April 14 2021 : 9:17:20 PM
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The screw goes into the weight. The light sits on top of the weight and the weight is half of the light's circuit. I agree with Bamos about the possibility of the wire to the light light shorting out, but not only against the screw, but any part of the weight. It's suspicious that the light has stopped working, and this could be one explanation for both symptoms.
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Posted - April 15 2021 : 09:19:31 AM
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| make sure the weight is not bending down to make contact with the yoke.
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Posted - April 15 2021 : 9:23:56 PM
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Ah....I will check that out asap
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in Heaven." - Matthew 5:16
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Posted - April 18 2021 : 7:49:10 PM
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The B&O Docksider LIVES!
https://youtu.be/hw_vXsjDaNo
What I did was: paint the tube part of the screw that holds everything together, and also put a little paint on the frame behind the copper wipers, as I noticed that when they bend a certain way, they can short out on the frame. It runs good as new, and the headlight works again. Contact/shorting was definitely the issue - thank you all for your help.
"Let your light so shine before men, that they may see your good works, and glorify your Father which is in Heaven." - Matthew 5:16
Youtube Channel: www.youtube.com/rpmodelrailroads
Instagram: https://www.instagram.com/rp_model_railroads/
Edited by - RP model railroads on April 18 2021 8:02:41 PM
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