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Offline Kartik  
#1 Posted : 27 March 2020 09:24:39(UTC)
Kartik

India   
Joined: 27/03/2020(UTC)
Posts: 6
Location: Mumbai
Hey

Given the current hiatus, I decided open up my vintage train sets and found that my Marklin 3029 engine only works in reverse

How do I fix this ? I have two Marklin sets and tried both analog power boxes to reverse the engine so it starts moving forward but no luck

Please help
Offline Jay  
#2 Posted : 27 March 2020 10:28:11(UTC)
Jay

South Africa   
Joined: 01/05/2010(UTC)
Posts: 265
Location: Johannesburg, South Africa
Hi Karthik,
there are experts on this forum that will be able to also help you with this problem,but I will attempt to help you as I have had experience with this very problem. You however have to remove the body of the loco(screws underneath loco) to attempt to solve the problem.
First check that the reverse relay is not stuck in one position by placing the loco on track and applying the reverse/forward pulse of the controller to the locomotive.The relay should energise on this power input.If not you could try freeing the mechanism using a small screwdriver. Be careful to not over stretch the little spring on the solenoid. Lets see how you progress with this remedy before we go on to other possible causes.I also look forward to comments and remedies from other forum members.
Good luck and kind regards
Jay

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Offline river6109  
#3 Posted : 27 March 2020 11:28:48(UTC)
river6109

Australia   
Joined: 22/01/2009(UTC)
Posts: 13,029
Location: On 1965 Märklin Boulevard just around from Roco Square
Jay, the 3029 has no screw on the bottom, all you do is extend the housing in the middle of the loco and you will be able to remove it.

your other advice is spot on unless there is wire loose

John
https://www.youtube.com/river6109
https://www.youtube.com/6109river
5 years in Destruction mode
50 years in Repairing mode
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Offline Jay  
#4 Posted : 27 March 2020 12:11:19(UTC)
Jay

South Africa   
Joined: 01/05/2010(UTC)
Posts: 265
Location: Johannesburg, South Africa
Hi John,
thanks for the correction.
I did a similar repair on a loco,I do not remember the number but it had screws at the bottom.So i made
the mistake of giving advice on my experience. much appreciate the information.
Warm regards
Jay
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Offline Kartik  
#5 Posted : 27 March 2020 14:18:38(UTC)
Kartik

India   
Joined: 27/03/2020(UTC)
Posts: 6
Location: Mumbai
Hi Jay, thank you for your reply I managed to open as per river6109’s directions (thanks) -

Please help me identify the solenoid. In addition, I think someone has tried to repair this before and there is a paper stuck (I am assuming this is supposed be where the spring is hence it’s in reverse.)

Ps how can I send a picture to you over here in the forum 🤭

Offline Jay  
#6 Posted : 27 March 2020 16:13:54(UTC)
Jay

South Africa   
Joined: 01/05/2010(UTC)
Posts: 265
Location: Johannesburg, South Africa
Hello Kartik,
unfortunately I help cannot help you with this one. However I am sure John or one of the more experienced members will oblige.
Just hang in there and you're bound to get a reply. So sorry that I cannot help.
Warm regards
Jay
Offline cookee_nz  
#7 Posted : 27 March 2020 19:52:25(UTC)
cookee_nz

New Zealand   
Joined: 31/12/2010(UTC)
Posts: 3,411
Location: Paremata, Wellington
Originally Posted by: Kartik Go to Quoted Post
Hi Jay, thank you for your reply I managed to open as per river6109’s directions (thanks) -

Please help me identify the solenoid. In addition, I think someone has tried to repair this before and there is a paper stuck (I am assuming this is supposed be where the spring is hence it’s in reverse.)

Ps how can I send a picture to you over here in the forum 🤭



https://www.marklin-user...me-tips-and-instructions
Cookee
Wellington
NZ image
thanks 1 user liked this useful post by cookee_nz
Jay
Offline Kartik  
#8 Posted : 29 March 2020 12:23:17(UTC)
Kartik

India   
Joined: 27/03/2020(UTC)
Posts: 6
Location: Mumbai
DB69288D-608E-4FA1-8A82-F184E6EDA70A.jpeg378B27B4-198F-437F-952B-104FB48924ED.jpeg

Hi Jay,

Managed to upload the pics

In general people seem to be adhering to the lockdown. but there are some areas that are going astray and local authorities are now going to step up their efforts a notch higher to bring people in line

Cheers

Stay Safe
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Jay
Offline ktsolias  
#9 Posted : 29 March 2020 14:46:08(UTC)
ktsolias

Greece   
Joined: 01/05/2016(UTC)
Posts: 476
Location: Athens
The spring on the relay is missing that is the reason of the problem

Kostas
Offline TrainIride  
#10 Posted : 29 March 2020 15:33:30(UTC)
TrainIride

France   
Joined: 23/10/2010(UTC)
Posts: 1,614
Location: FRANCE
Part number of this spring:

Märklin 7194
This spring is available in a set of 5 :
7194

Best Regards
Joël
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Jay
Offline jlopez  
#11 Posted : 29 March 2020 15:39:36(UTC)
jlopez

United States   
Joined: 28/11/2004(UTC)
Posts: 140
Location: San Francisco
If you have a pen around that is one of those click types take it apart and try using the spring. Might work in a pinch. I’ve also used it to fix switches while waiting
For parts.
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Offline Kartik  
#12 Posted : 29 March 2020 16:06:42(UTC)
Kartik

India   
Joined: 27/03/2020(UTC)
Posts: 6
Location: Mumbai
Thank you Kostas, Joël and Jlopez CF6BCB93-2D1D-427B-8B4D-2D31DD403695.jpeg

I have attached another image with mark up line of where I think the spring has to be fixed.

However, I this is the correct place because I can’t find the second hook where the spring should hook into on the loco

thanks 2 users liked this useful post by Kartik
Offline TrainIride  
#13 Posted : 29 March 2020 19:08:05(UTC)
TrainIride

France   
Joined: 23/10/2010(UTC)
Posts: 1,614
Location: FRANCE
Hi Kartik,

You are right!
Please take a look at my loco:

Marklion_3029_inside.jpg

Best regards
Joël
Offline Kartik  
#14 Posted : 29 March 2020 20:44:34(UTC)
Kartik

India   
Joined: 27/03/2020(UTC)
Posts: 6
Location: Mumbai
Originally Posted by: TrainIride Go to Quoted Post
Hi Kartik,

You are right!
Please take a look at my loco:

Marklion_3029_inside.jpg

Best regards
Joël


Hi Joel, thanks for the pic 👍🏼

I think the plastic hook on loco is broken, I will have to find a remedy for this, if you have any ideas let me know...

Till then I will need to find some small plastic part to fit there
Offline cookee_nz  
#15 Posted : 29 March 2020 22:08:50(UTC)
cookee_nz

New Zealand   
Joined: 31/12/2010(UTC)
Posts: 3,411
Location: Paremata, Wellington
Originally Posted by: Kartik Go to Quoted Post
Originally Posted by: TrainIride Go to Quoted Post
Hi Kartik,

You are right!
Please take a look at my loco:

Marklion_3029_inside.jpg

Best regards
Joël


Hi Joel, thanks for the pic 👍🏼

I think the plastic hook on loco is broken, I will have to find a remedy for this, if you have any ideas let me know...

Till then I will need to find some small plastic part to fit there


You only have two solutions really. Either you will have to glue something on to hold the other end of the spring, or replace the entire reverse unit. Possibly that small plastic hook got broken when refitting the body some previous time, in which case you might find the broken piece (tiny) and more importantly the spring in the box it was stored in?

You could probably fashion something out of just about anything you might have lying around, or you nay even be able to look at opening the loop of the end of the spring to hook it onto the body of the reverse unit but that will be a bit fiddly and you'll need steady fingers and fine tweezers. Be careful not to stretch the spring.

Oh, the other thing is you can at least manually reverse the unit so the Loco runs forward, but without the spring, the solenoid will tend to 'chatter' (vibrate and try to operate)

Cookee
Wellington
NZ image
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Offline kiwiAlan  
#16 Posted : 30 March 2020 09:22:23(UTC)
kiwiAlan

United Kingdom   
Joined: 23/07/2014(UTC)
Posts: 5,074
Location: ENGLAND, Didcot
Originally Posted by: Kartik Go to Quoted Post
Originally Posted by: TrainIride Go to Quoted Post
Hi Kartik,

You are right!
Please take a look at my loco:
...
Best regards
Joël


Hi Joel, thanks for the pic 👍🏼

I think the plastic hook on loco is broken, I will have to find a remedy for this, if you have any ideas let me know...

Till then I will need to find some small plastic part to fit there


What I would try and do is to drill a small hole, about 1mm (40 thou) or smaller diameter in the end wall of the reversing unit. Don't use a drill when doing this, hold the drill bit in a pin vice rotated between your fingers. with care it should be possible to drill a large enough for the loop of the spring to go through without damaging the solenoid winding. This would at least get you running again until you find a replacement reversing unit on eBay or the like.
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