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Old steamers (BR01 3048,...) chimney manufacturing
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Offline Brakepad  
#1 Posted : 30 August 2009 08:51:36(UTC)
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Brakepad

France, Metropolitan   
Joined: 25/08/2008(UTC)
Posts: 633
Location: Montlouis sur Loire, France
Hi all,

You may remember this topic:

https://www.marklin-users.net/fo...ult.aspx?g=posts&t=12585

where an old BR01 3048 was "overhauled", and it was stated that everything on it was built to last...except its chimney insert, which in early models is made from a material (fiber? plastic?) which gets worse as time goes by. In this particular model, the chimney insert had lost some material and its appearance was not good anymore:

UserPostedImage

This is the chimney insert once it has been disassembled from the loco:

UserPostedImage

You can see that its condition its poor...

Yesterday I visited a friend who has a small workshop in his garage. As we had some spare time I asked him to try to manufacture new chimney inserts made from stainless steel.

And this is the result. This was some kind of "approximative" test, actual parts are slightly oversized but they appear to be OK, in particular if the original part is not there to compare. Moreover, the smoke unit can be fitted to the new parts:

UserPostedImage

This one compares old vs new part:

UserPostedImage

This one shows how it gets when assembled on the loco:

UserPostedImage

This one compares a loco with the old insert vs another with the new insert:

UserPostedImage



check out http://maerklin-back-on-track.blogspot.com if you like to see how old Märklin locos are brought back into life! (in spanish by the moment)
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Offline Bigdaddynz  
#2 Posted : 30 August 2009 11:46:29(UTC)
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Bigdaddynz

New Zealand   
Joined: 17/09/2006(UTC)
Posts: 18,663
Location: New Zealand
Very clever approach to repairing the faulty item.
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Offline steventrain  
#3 Posted : 30 August 2009 13:17:23(UTC)
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steventrain

United Kingdom   
Joined: 21/10/2004(UTC)
Posts: 31,606
Location: United Kingdom
Very good.
Large Marklinist 3- Rails Layout with CS2/MS2/Boosters/C-track/favorites Electric class E03/BR103, E18/E118, E94, Crocodiles/Steam BR01, BR03, BR05, BR23, BR44, BR50, Big Boy.
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Offline RayF  
#4 Posted : 30 August 2009 14:02:29(UTC)
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RayF

Gibraltar   
Joined: 14/03/2005(UTC)
Posts: 15,839
Location: Gibraltar, Europe
Very good repair, Brakepad.

The old lady can smoke again!
Ray
Mostly Marklin.Selection of different eras and European railways
Small C track layout, control by MS2, 100+ trains but run 4-5 at a time.
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Offline river6109  
#5 Posted : 30 August 2009 15:03:04(UTC)
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river6109

Australia   
Joined: 22/01/2009(UTC)
Posts: 14,716
Location: On 1965 Märklin Boulevard just around from Roco Square
S/S is not the best electricity conducter.
Did you have problems with it.

regards.,
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 Brakepad  
#6 Posted : 30 August 2009 23:39:05(UTC)
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Brakepad

France, Metropolitan   
Joined: 25/08/2008(UTC)
Posts: 633
Location: Montlouis sur Loire, France
Quote:
[size=1" face="Verdana" id="quote]quote:Originally posted by river6109
<br />S/S is not the best electricity conducter.
Did you have problems with it.

regards.,
John


Hi John,

Even if S/S resistivity is much higher compared to, i.e., copper, the absolute value of the resistivity of the chimney insert, between the housing and the smoke unit would be low enough to allow perfect operation of the smoke unit. Thickness of insert between the housing and the smoke unit is very, very low (less than 1 mm), and IMHO the housing itself would have a higher electrical resistivity than the S/S chimney insert.

However, this locomotive (3048) does not rely on the chimney to conduct electricity to the smoke unit (in fact the original part is made from an isolating material!), but on two copper plates located beside the light bulb. See:

UserPostedImage

So far, I have had no problems at all with it, and appearance has improved a lot, IMHO. Perhaps this would be more noticeable if the loco was resprayed.

Thanks and regards.

check out http://maerklin-back-on-track.blogspot.com if you like to see how old Märklin locos are brought back into life! (in spanish by the moment)
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Offline kbvrod  
#7 Posted : 19 January 2013 23:43:15(UTC)
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kbvrod

United States   
Joined: 23/08/2006(UTC)
Posts: 2,597
Location: Beverly, MA
Hi all,
Weinert.

Dr D
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Offline Iamnotthecrazyone  
#8 Posted : 19 January 2013 23:50:45(UTC)
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Iamnotthecrazyone

Australia   
Joined: 22/01/2012(UTC)
Posts: 1,044
Originally Posted by: Brakepad Go to Quoted Post
Quote:
[size=1" face="Verdana" id="quote]quote:Originally posted by river6109
<br />S/S is not the best electricity conducter.
Did you have problems with it.

regards.,
John


Hi John,

Even if S/S resistivity is much higher compared to, i.e., copper, the absolute value of the resistivity of the chimney insert, between the housing and the smoke unit would be low enough to allow perfect operation of the smoke unit. Thickness of insert between the housing and the smoke unit is very, very low (less than 1 mm), and IMHO the housing itself would have a higher electrical resistivity than the S/S chimney insert.

However, this locomotive (3048) does not rely on the chimney to conduct electricity to the smoke unit (in fact the original part is made from an isolating material!), but on two copper plates located beside the light bulb. See:

UserPostedImage

So far, I have had no problems at all with it, and appearance has improved a lot, IMHO. Perhaps this would be more noticeable if the loco was resprayed.

Thanks and regards.



The earlier model may rely on the two plates. If memory serves me right on later models you have only the bottom plate but no side plate. This post makes want to go through opening the different versions to check on differences. Must be that my oldest ones are in perfect condition but I've never noticed the chimeney wasn't metal, everything seem to be the same material. Thank you for posting the photos.
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