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3031 Reverse Unit / Telex - Replacement
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Offline OMAC  
#1 Posted : 22 April 2023 10:34:00(UTC)
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OMAC

New Zealand   
Joined: 14/07/2021(UTC)
Posts: 32
Location: Whangarei, Auckland
Has anybody got any spare Reverse/Telex units sitting on your shelf that I could get for a reasonable price?

I am looking to replace the one in my old girl 3031 and another to keep as a spare.

I don't really want to scrap the old girl.

I have been fixing her up and got her going nicely but unfortunately the reverse unit and drum are past the point of no return and the telex's stay on in all four pulses. I have been advised by a member not to run her continually like this as the telex's are only supposed to stay on for a moment to unhook the rolling stock.

The Telex's work fine - so is has to be the drum or the fingers of the reverse unit.

Cheers Owen


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Offline PJMärklin  
#2 Posted : 22 April 2023 14:20:40(UTC)
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PJMärklin

Australia   
Joined: 04/12/2013(UTC)
Posts: 2,210
Location: Hobart, Australia
Originally Posted by: OMAC Go to Quoted Post
Has anybody got any spare Reverse/Telex units sitting on your shelf that I could get for a reasonable price?

I am looking to replace the one in my old girl 3031 and another to keep as a spare.

I don't really want to scrap the old girl.

I have been fixing her up and got her going nicely but unfortunately the reverse unit and drum are past the point of no return and the telex's stay on in all four pulses. I have been advised by a member not to run her continually like this as the telex's are only supposed to stay on for a moment to unhook the rolling stock.

The Telex's work fine - so is has to be the drum or the fingers of the reverse unit.

Cheers Owen





PM. sent
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Offline OMAC  
#3 Posted : 23 April 2023 12:36:13(UTC)
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OMAC

New Zealand   
Joined: 14/07/2021(UTC)
Posts: 32
Location: Whangarei, Auckland
Hi PJ

Thanks again for your advice.

I have been having trouble attaching a file (apic of the reverse unit)

I will try again here.

3031 Reverse - Telex Unit with drum.jpg

If it does not open my email is:

owen.brett41karanui@gmail.com
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thanks 1 user liked this useful post by OMAC
Offline kaav800  
#4 Posted : 24 April 2023 10:32:22(UTC)
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kaav800

Norway   
Joined: 05/07/2019(UTC)
Posts: 48
Location: Rogaland
Hello Owen !!
I think tere suppose to be an isolationwasher under the metalplate for ground,not easy to tell from the picture.The telex is oprated by ground.As it seems to be now everything is grounded,an the telex are activated.
Maybee this is not easy to anderstand,but i mean the metalbracket that lies under the skrew holding the device.Also metalplate(ground) must be isolated from the springcontacts.
Hope you will be able to fix this.

Best regards kaav800
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Offline JohnjeanB  
#5 Posted : 24 April 2023 11:58:31(UTC)
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JohnjeanB

France   
Joined: 04/02/2011(UTC)
Posts: 3,123
Location: Paris, France
Hi Owen
Here is the 1960 Märklin parts catalogue related to the Telex Relay 21374
There is a long screw (#3) attaching:
- the contact plate with thin copper wire (coil)
- the relay transparent housing (fig 2)
- the drum holder (sheet metal #4)
- the loco frame
Indeed there must be an insulation between the contact plate with thin copper wire and the contact blade underneath otherwise, that contact blade - one of the motor directions- is permanently connected to the frame ground (goes in one direction and hums before burning in the other direction).
1960TelexRelay.png

Cheers
Jean
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latest vid
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Offline OMAC  
#6 Posted : 19 May 2023 12:20:30(UTC)
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OMAC

New Zealand   
Joined: 14/07/2021(UTC)
Posts: 32
Location: Whangarei, Auckland
Hello to all the members that offered advice on this subject.

Update - I have managed to get the old girl working with some creative soldering and pin adjustments. lots of trial and error but a great learning curve.

Cheers Owen
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