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Pantograph pick-up adjustment for typical Märklin locos.
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Offline BR01097  
#1 Posted : 10 April 2013 05:51:46(UTC)
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BR01097

United States   
Joined: 17/11/2010(UTC)
Posts: 228
Location: Denver, Colo. USA


Tonight, I just discovered the significance of the wings running parallel to the roofline of the typical locomotive flairing from the nut securing the pantograph to the roof: they limit the height of extension. If these are too flat, the pantograph will lose contact to the overhead wire or spark excessively.

Illustration on borrowed locomotive attached.

BR01097 attached the following image(s):
sncf%203038%20pantho.jpg

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Offline mike c  
#2 Posted : 10 April 2013 06:25:27(UTC)
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mike c

Canada   
Joined: 28/11/2007(UTC)
Posts: 8,220
Location: Montreal, QC
Those two pieces are actually used to clip the diagonal part of the pantograph so that the pantograph remains locked in the 'down' position when not in use.
Incidentally, the photo shows what appears to be a rather mangled pantograph base. Should the metal of the pantograph actually contact the metal surface of the locomotive, this would cause a short, so I would recommend that the pantograph be replaced, if this is in fact one of your locomotives.

Back to your comment, the tension of the pantographs is assured by the two springs, one of which seems to be missing and the excess sparking is caused if the slider is not evenly contacting the catenary wire.
The model, if I am correct, is one of the SNCF BB9200 models. FYI, Sommerfeldt makes a model of a SNCF pantograph that can be used in place of the original Maerklin one that looks more prototypical.

Regards

Mike C
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Offline river6109  
#3 Posted : 10 April 2013 06:36:58(UTC)
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river6109

Australia   
Joined: 22/01/2009(UTC)
Posts: 14,873
Location: On 1965 Märklin Boulevard just around from Roco Square
Mike,

Your observation is correct but you don't have to replace it.
Märklin Pantographs aren't the best when it comes to design but they are at least sturdy. What has happened here with the above photo, the loco pantographs had been pressed down and has come out of the slots it normally sits in. by taking the pantograph apart (which you can do) you can re align the metal strips and put them back into the isolator plate. the isolator plate may has been broken and this can be reset with superglue and one of its mounting slots have come out of the housing.
the arrow you've shown, indeed you can adjust the height of the pantograph but they are set by the manufacturer to a common height.
pantographs are not cheap to replace. usually between Euro 17.00 - 28.00 each

John.
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pantograph.JPG
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Offline mike c  
#4 Posted : 10 April 2013 06:49:43(UTC)
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mike c

Canada   
Joined: 28/11/2007(UTC)
Posts: 8,220
Location: Montreal, QC
Actually, the 7218 pantograph can be found for very reasonable prices on ebay.de
Here is the Sommerfeldt one I mentioned: http://www.tee-usa.com/store/product5758.html

Here is the real lok: http://www.railfaneurope...een/9260-92/9200aust.jpg

Regards

Mike C
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Offline river6109  
#5 Posted : 10 April 2013 11:36:19(UTC)
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river6109

Australia   
Joined: 22/01/2009(UTC)
Posts: 14,873
Location: On 1965 Märklin Boulevard just around from Roco Square
Originally Posted by: mike c Go to Quoted Post
Actually, the 7218 pantograph can be found for very reasonable prices on ebay.de
Here is the Sommerfeldt one I mentioned: http://www.tee-usa.com/store/product5758.html

Here is the real lok: http://www.railfaneurope...een/9260-92/9200aust.jpg

Regards

Mike C


Looking closely at the prototype it is closer to this panto

John

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loco 6.JPG
loco 3.JPG
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Offline BR01097  
#6 Posted : 10 April 2013 23:18:16(UTC)
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BR01097

United States   
Joined: 17/11/2010(UTC)
Posts: 228
Location: Denver, Colo. USA



I should have chosen a better sample to illustrate the point. First, this is not my model; my BB9200 has single-bar. It came off a Google search and its pantograph is twisted and the plastic base badly damaged. Pantographs are secured in the "down" position by four clamps and spring up when the clamps are cleared.

However, the point is the two tongues that protrude from the screw. THESE regulate the height the unit can reach when it is not on the track. If these are too flat, the pantograph may not rise to meet the wire.



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