Ed, I can't see any way of determining if there's any distortion. If
you look at the basic shape of the boxes they resemble a walnut--not
much is flat or straight. I did run a fine file through the axle
bearing area, but that really wasn't the problem from what I can tell.
If there's any crimping it must be in the top shaft that runs between
the two boxes. I did notice some 'humping' of the two boxes when you
twist the main center shaft--sort of like a Chinese dragon festival
without the fireworks ! I was trying not to remove those fragile
universal couplings on one end and the press fit brass coupling on the
other.
I plan to fix the main gearbox first then go into the truck again as I
start the reassembly process.
Bob Werre
BobWphoto.com
>
> > This set of axle mounted gearboxes didn't
> > run as smooth. <snip> I also went in
> > and reamed the axle holes a bit. It's
> > improved but still not as good as the other truck.
> > Bob Werre
>
> Bob....Is it possible the zamac gearboxes are distorting or expanding
> due to contamination? Or is there some other explanation? Have you
> contemplated the basic reason for the axles being tight in the
> gearboxes? Curious as heck since I am about to fine tune my FAs locos
> in a similar manner in the near future. Thanks...Ed L.
>
>
>
[Non-text portions of this message have been removed]
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