Author Topic: Lowering Micro-Trains depressed-center flat  (Read 1838 times)

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Mark5

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Re: Lowering Micro-Trains depressed-center flat
« Reply #45 on: March 19, 2026, 11:49:14 PM »
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One thing to keep in mind is the prototype GSC depressed center flats had the trucks inboard,
and the "weird" looking overhangs. If you are modeling a GSC car it is correct.

Kinda true as well for N&W's Thrall built ones 70096-70098: https://www.nwhs.org/archivesdb/thumbs/slides/NW13028.jpg


nickelplate759

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Re: Lowering Micro-Trains depressed-center flat
« Reply #46 on: March 26, 2026, 08:18:27 PM »
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A little more exprimenting and research....

I first tried filing down the bolster on the truck - that's what I did in the previous picture I posted.  There are two problems with this.  First, you need to fashion a custom bolster pin as the truck bolster is now too thing for stock MicroTrains pins, and the pin will interfere with the center axle.    Second, if you want to relocate the bolster, you can't easily do it.

So I tried the other method - file down the body bolster and use unmodified (except for removing the couplers) trucks.  This wasn't as fussy as I had feared, as the sides of the metal frame are hidden by the plastic casting for the end platforms.

But...as I looked at the one photo I have found of this car, I've become convinced that the trucks really should look inset from the ends.   I realize that's not true of ALL similar depressed-center cars, but I think it is true of this one (which was apparently built on a GCS cast frame).   The good news is that there is just enough room for the trucks to swing after lowering and substituting 28" ESM wheels (I track-tested it).  It won't work with the stock MicroTrains 33" wheels.

So...on to finishing!  Gotta strip and repaint it.
« Last Edit: March 26, 2026, 08:21:34 PM by nickelplate759 »
George
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I'm sorry Dave, I'm afraid I can't do that.

nscaler711

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Re: Lowering Micro-Trains depressed-center flat
« Reply #47 on: March 27, 2026, 12:09:46 AM »
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Ah I did this a few years ago, runs like a charm. Or whenever the roller bearing three axle trucks MTL made.
It's on my bench now because I canibalized the MTL 903s for a z scale project. I used Z scale couplers because of turning radius was limited to 17" and above.

I filed down the factory bolsters, and trimmed a washer included in some MTL coupler sets/ truck conversions. And this is where the trucks sit currently. I also used FVM 28" wheels due to a clearance issue with 36" wheels