br 130

br 130

Postby jmass » Thu Mar 25, 2010 9:13 pm

i just bought a berliner bahnen br 130 on ebay. its a nice loco but it seems to wobble at mid and slow speeds.was going to take it apart and have a look in side, but a little nervous as it doesnt seem to snap apart. any info would be appreciated.
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Re: br 130

Postby BTTB Fan » Thu Mar 25, 2010 9:33 pm

It opens in the same way as most other BTTB diesels. If you turn it upside down, you will see the cut-outs in the frame next to the cab doors. Stick in a small screwdriver and gently pry the body away from the frame (to the outside and "up").
Also, for most BTTB diesels, I find that oiling the wrom mechanism in the bogeys makes a big difference in running characteristics.
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Re: br 130

Postby AstroGoat760 » Thu Mar 25, 2010 9:46 pm

I would take a look at the frame, once the shell is off and make sure that the frame is in good condition and not too badly warped.

A little weight might also help with the wobbling, just make sure to not overload the frame and motor as well as try to keep the center of gravity as low as possible.
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Re: br 130

Postby ConducTTor » Thu Mar 25, 2010 10:11 pm

I've come to the conclusion that the wobble in BTTB models is caused by misalignment and/or warping of gears over time. Due to this at certain points in the revolution two gears press against each other more than normal requiring more torque to get through the tight spot. This in turn torques the motor and therefore the body against the trucks causing the body to tilt. That's why the faster it goes, the higher the frequency of the wobble.

I've also come to the conclusion that the only fix is a drive train overhaul. Sorry :(
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Re: br 130

Postby jmass » Sat Mar 27, 2010 12:03 pm

where does one order parts for a drive train overhaul? bttb was taken over by tillig i believe, but i wonder if they would still have parts for they older locos.maybe eurotrain hobbys.
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Re: br 130

Postby CSD » Sat Mar 27, 2010 1:23 pm

Hello, jmass. Before you get too heavily involved in reworking this model you may want to consult this thread:
berliner-tt-bahnen-library-model-q-a-t401.html

The old BTTB BR130 has enough issues that you may want to consider one of the new BR132's from Roco.
Mark
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Re: br 130

Postby jmass » Sat Mar 27, 2010 2:00 pm

hey csd, thanks for the heads up. this is getting into the realm of o guage and o 27. i guess i wont be spending any money on getting this fixed.
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Re: br 130

Postby ConducTTor » Sat Mar 27, 2010 2:52 pm

Not sure why I didn't think of this earlier but there is an alternative. Do a search on Harry Barth here on the forum. He is a guy in Germany that used to sells kits on Ebay for older BTTB locos. The kit comes with a new Mashima motor with flywheel and a few gears. If he is still selling them, that could be an option for you. I bought 3 a couple years ago and they made a big difference although I don't remember if they completely cured the wobble (I sold the locos shortly after modding them).
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Re: br 130

Postby ConducTTor » Sun Mar 28, 2010 2:57 pm

What people think: "liberals/conservatives are ruining my country"
What the powerful know: divide and conquer
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Re: br 130

Postby jmass » Sun Mar 28, 2010 5:22 pm

thanks alex, i put it on my watch list and if it still there by thursday i will buy it.
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