Problems M.U.'ing Kato and Athearn locos

Problems M.U.'ing Kato and Athearn locos

Post by Elson Trinida » Mon, 03 Feb 1997 04:00:00



I just bought a Kato C44-9W the other day and I just *LOVE* the way it
runs. I already own an Athearn version of the model (SP) so since I model
modern-era, I thought it would be neat to get a UP leading unit since
there's lots of UP locos heading SP trains these days due to the merger.

Anyway, when I pull a 12-unit container train with an Athearn Dash 9
followed by an Athearn SD40T-2, everyhing is fine. However, whenever I use
the Kato to pull either the Athearn Dash-9 or the SD40T-2, on certain
sections, the foremost axle of the Athearn (the one that's closest to the
Kato) has a tendency to derail. I even checked the wheels with an NMRA
gauge and they seem fine and in gauge, however when I watch the trucks
carefully, they seem to have a slight wobble (amongst the axles). Is this
the main problem? How do I fix this?

Also, when I pull the Kato UP Dash 9 with any Athearn loco, the problem
doesn't arise.

Can anyone help?

Elson
--
                                     -30-
========================================
Elson Trinidad, Los Angeles CA, USA

http://www.westworld.com/~elson
Nostradamus predicted that no one would take his predictions seriously.
Confucius say: "Please stop quoting me."

 
 
 

Problems M.U.'ing Kato and Athearn locos

Post by Bryan Christense » Tue, 04 Feb 1997 04:00:00


Are these locomotives going around curves when the derailment happens?  If
so, it could be that your curves are too sharp for such long locomotives.

-Bryan



Quote:

> Anyway, when I pull a 12-unit container train with an Athearn Dash 9
> followed by an Athearn SD40T-2, everyhing is fine. However, whenever I
use
> the Kato to pull either the Athearn Dash-9 or the SD40T-2, on certain
> sections, the foremost axle of the Athearn (the one that's closest to the
> Kato) has a tendency to derail. I even checked the wheels with an NMRA
> gauge and they seem fine and in gauge, however when I watch the trucks
> carefully, they seem to have a slight wobble (amongst the axles). Is this
> the main problem? How do I fix this?

> Also, when I pull the Kato UP Dash 9 with any Athearn loco, the problem
> doesn't arise.

> Can anyone help?

> Elson
> --
>                                      -30-
> ========================================
> Elson Trinidad, Los Angeles CA, USA

> http://www.westworld.com/~elson
> Nostradamus predicted that no one would take his predictions seriously.
> Confucius say: "Please stop quoting me."


 
 
 

Problems M.U.'ing Kato and Athearn locos

Post by Lyle Dowe » Wed, 05 Feb 1997 04:00:00



<snip>........................................ However, whenever I use

Quote:
>the Kato to pull either the Athearn Dash-9 or the SD40T-2, on certain
>sections, the foremost axle of the Athearn (the one that's closest to the
>Kato) has a tendency to derail.

Does this happen on straights, curves, or both? If it's only on curves, how
sharp are they? The locos with which you are having trouble are VERY long
vehicles, and their extra length creates a lot of coupler swing that might be
trying to pull an adjacent vehicle off the rails. If your other Athearns are
shorter, even tho' they may be SD's, this could be the problem. You may be able
to change coupler length to help this(presumimg yu're using Kadee's or
similar). Hope this helps.  :)

Lyle Dowell

 
 
 

Problems M.U.'ing Kato and Athearn locos

Post by Elson Trinida » Wed, 05 Feb 1997 04:00:00




Quote:
> Are these locomotives going around curves when the derailment happens?
If
> so, it could be that your curves are too sharp for such long locomotives.

Thanks. At times I hate myself for building my layout 8 years ago with 18"
radius curves.
Only after I laid the track did a lot of 22" minimum stuff came out as well
as 22" radius track.
But it's too late now...

The derailments do happen at curves, but not all of them. I do have a
problem track section that I'm working on replacing.

Incidentally, I tried the Kato pulling an Athearn FP45, which is about the
equivalent length, and it had no problems.

Elson

 
 
 

Problems M.U.'ing Kato and Athearn locos

Post by dorega » Wed, 05 Feb 1997 04:00:00


Quote:



> > Are these locomotives going around curves when the derailment happens?
> If
> > so, it could be that your curves are too sharp for such long locomotives.

> Thanks. At times I hate myself for building my layout 8 years ago with 18"
> radius curves.
> Only after I laid the track did a lot of 22" minimum stuff came out as well
> as 22" radius track.
> But it's too late now...

> The derailments do happen at curves, but not all of them. I do have a
> problem track section that I'm working on replacing.

> Incidentally, I tried the Kato pulling an Athearn FP45, which is about the
> equivalent length, and it had no problems.

> Elson

Well, if your trucks are not swiveling enough to match the radii tou can
modify (file the heck out of them) the undercarriage so they will turn
better. I've done this with a few "SD" type engines and it works well.

Dennis