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Offline Dimi194  
#1 Posted : 18 July 2011 02:22:38(UTC)
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Dimi194

Australia   
Joined: 21/02/2011(UTC)
Posts: 382
Hey all,
I have a problem. My Digitally converted 3099 steam loco is running oddly. At low speeds it runs fine, but once it passes about halfway it get jerky. This has been happening for a while, but just today the engine makes a screeching noise when it is run over about half speed. The engine sounds like it is slipping or something, but I don't see how this is possible. I can't see anything that looks damaged and I checked the motor brushes, they are okay. Any ideas?? Thankyou, Dimi
Author of the gritty sci-fi novel 'Stories of Earth: WWIII' (featuring an awesome train chase)
Avid YouTuber (XtremeTrainz and TrainzXtreme) and train person!
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Offline Dimi194  
#2 Posted : 18 July 2011 02:54:36(UTC)
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Dimi194

Australia   
Joined: 21/02/2011(UTC)
Posts: 382

This is a video of it happening...
Author of the gritty sci-fi novel 'Stories of Earth: WWIII' (featuring an awesome train chase)
Avid YouTuber (XtremeTrainz and TrainzXtreme) and train person!
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Offline mvd71  
#3 Posted : 18 July 2011 05:43:01(UTC)
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mvd71

New Zealand   
Joined: 09/08/2008(UTC)
Posts: 1,727
Location: Auckland,
Hi Dimi,

Your loco needs servicing! It needs a drop of oil on the gears and each end of the motor armature, as per the marklin instructions.
Once you do this the problem should go awayCool

Mike.
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thanks 1 user liked this useful post by mvd71
Offline RayF  
#4 Posted : 18 July 2011 09:07:24(UTC)
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RayF

Gibraltar   
Joined: 14/03/2005(UTC)
Posts: 15,839
Location: Gibraltar, Europe
Mike is absolutely right. This is classic behaviour from a Marklin DCM motor. A drop of oil on each of the motor bearings is all that is needed.
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 hxmiesa  
#5 Posted : 18 July 2011 09:19:17(UTC)
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hxmiesa

Spain   
Joined: 15/12/2005(UTC)
Posts: 3,520
Location: Spain
-and if that doesnt help; change the motor-brushes.
Best regards
Henrik Hoexbroe ("The Dane In Spain")
http://hoexbroe.tripod.com
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Offline river6109  
#6 Posted : 18 July 2011 10:32:47(UTC)
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river6109

Australia   
Joined: 22/01/2009(UTC)
Posts: 14,720
Location: On 1965 Märklin Boulevard just around from Roco Square
.. and if this doesn't help clean the whole motor and gears.

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 Dimi194  
#7 Posted : 18 July 2011 12:11:35(UTC)
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Dimi194

Australia   
Joined: 21/02/2011(UTC)
Posts: 382
Thanks, I think all it need was an oil but it's still on probation...
Author of the gritty sci-fi novel 'Stories of Earth: WWIII' (featuring an awesome train chase)
Avid YouTuber (XtremeTrainz and TrainzXtreme) and train person!
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Offline intruder  
#8 Posted : 19 July 2011 00:28:25(UTC)
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intruder

Norway   
Joined: 16/08/2006(UTC)
Posts: 5,382
Location: Akershus, Norway
I excperienced some of the same symptoms on one of my locos after conversion.

I used the conversion set Märklin 60901. Oil did not help. I had to replace the motor cover, or brush holder if you like.
It seems like the rotor was not perfectly centered, or the bearing "hole" was too big, so the rotor started to vibrate at certain speeds.

Photo, for illustration only:
UserPostedImage
Best regards Svein, Norway
grumpy old sod
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