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<title>Re: NW-Modeling-List Digest, Vol 70, Issue 5</title>
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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Mark: Something is loose or
mis-aligned……duh….. Seriously, take the
shell off and look at the gear meshes. If it loads up heavily UNDER
LOAD and then speeds up without load (going down grade) it is likely that
the a gear mesh somewhere is either pinched together – no backlash in one
direction of rotation- or too far apart. I do not know about this model’s
transmission style, but a worm drive where the worm is shifted fore-or-aft over
the worm wheel or is spaced too high above or too low, taking out all of the
backlash, will cause your sort of problems. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Backlash= the space behind the meshing
gears where the driving gear tooth rolling out of mesh from the driven gear
clears the driven gear tooth to the rear. You gotta have some backlash or
the backs of the teeth cut away the opposite gear. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>On a worm gear, moving the center of the
worm wheel ‘up or ’down’ away from the centerline of the
changes the backlash. Also, shifting the worm away from or towards the
worm wheel will change the backlash too. This is changes by adding or
subtracting shims behind the worm wheel. Up and down requires mounting
corrections.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Drivers out of square (opposite pins not
at 90 degrees) and oversize rod bores can cause similar binding/no binding
situations. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Loose motor in its mounting is a possibility
too. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Gary Rolih<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>Cincinnati</span></font></st1:place></st1:City><font size=2
color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'><o:p></o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
nw-modeling-list-bounces@nwhs.org [mailto:nw-modeling-list-bounces@nwhs.org] <b><span
style='font-weight:bold'>On Behalf Of </span></b><st1:PersonName w:st="on">NW
Modeling List</st1:PersonName><br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, October 09, 2009
7:41 AM<br>
<b><span style='font-weight:bold'>To:</span></b> <st1:PersonName w:st="on">NW
Modeling List</st1:PersonName><br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: NW-Modeling-List
Digest, Vol 70, Issue 5</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=4
face="Lucida Grande"><span style='font-size:14.0pt;font-family:"Lucida Grande"'>The
J I have is only a year old. The engine won’t pull more than 8
heavyweights up my 2 percent. The big problem is that coming down the
other side it speeds up and the mech freezes, stalls locks, up or some such. I
have the “in service” version with the dual side rods between 2
& 3 drivers.<br>
<br>
<br>
Mark Lindsey<br>
Stuck in the 1930’s<br>
<br>
<br>
On 10/9/09 2:28 AM, "<st1:PersonName w:st="on">NW Modeling List</st1:PersonName>"
<<a href="nw-modeling-list@nwhs.org">nw-modeling-list@nwhs.org</a>>
wrote:</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=4 face="Lucida Grande"><span style='font-size:
14.0pt;font-family:"Lucida Grande"'>Mark,<br>
<br>
Which version of the Bachmann J do you have? If you have the original
Bachman J, then I agree with your assessment of the mechanism. Bowser
used to make a replacement chassis for them. If, however, you have one of
their recent (relatively) Spectrum J models, then I disagree. I think
Bachmann did a fine job with that model. Early ones had some problems
with the trailing truck mechanism causing derailments, but that was easily
fixed. Mine run superbly, and I installed either Soundtraxx DSD decoders,
or Soundtraxx DSX sound decoders with TSX motor decoders. Both work
superbly, although, I know that the newer Tsunami would work even better, but
I'm not changing them. It is easy to fry the lights, but also easy to
fix.<br>
<br>
Cheers,<br>
Kert Peterson<br>
<st1:place w:st="on"><st1:City w:st="on">Fircrest</st1:City>, <st1:State w:st="on">WA</st1:State></st1:place><br>
<br>
On Thu, Oct 8, 2009 at 9:00 AM, <<a href="nw-modeling-list-request@nwhs.org">nw-modeling-list-request@nwhs.org</a>>
wrote:</span></font><o:p></o:p></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=4
face="Lucida Grande"><span style='font-size:14.0pt;font-family:"Lucida Grande"'>Date:
Wed, 7 Oct 2009 18:18:48 -0400<br>
From: <st1:PersonName w:st="on">NW Modeling List</st1:PersonName> <<a
href="nw-modeling-list@nwhs.org">nw-modeling-list@nwhs.org</a>><br>
Subject: Re: Soundraxx Southern Steam decoder into a Bachmann J DCC<br>
ready Ho loco<br>
To: <st1:PersonName w:st="on">NW Modeling List</st1:PersonName> <<a
href="nw-modeling-list@nwhs.org">nw-modeling-list@nwhs.org</a>><br>
Message-ID: <<a href="4DA6E4E2-E8FA-4506-AB24-4B0C0D6A415D@earthlink.net">4DA6E4E2-E8FA-4506-AB24-4B0C0D6A415D@earthlink.net</a>><br>
Content-Type: text/plain; charset="us-ascii";
Format="flowed";<br>
DelSp="yes"<br>
<br>
The decoder might be set up for 16v lights? Just guessing. I
fried<br>
my J's lights with a Soundtraxx Steam decoder from 2002? era. Sounds<br>
great, but I cooked the LED lights. I'l re-visit the lights with MV<br>
lenses and Grain-Of-Dust lights.<br>
<br>
<br>
I hate my Bachmann J because of the wimpiest mechanism I've even seen<br>
in a 'modern' HO steam engine.<br>
I'm seriously looking at Gutting it and putting in a real motor and<br>
NWSL gearbox.<br>
This all depends on axle diameter.<br>
My Brazelton "Auto-Quarter" is for 1/8" axles and slightly
smaller<br>
Brass imports size.<br>
<br>
<br>
Mark Lindsey<br>
Stuck n the 1930's.<br>
<br>
<br>
<br>
<br>
<br>
On Oct 6, 2009, at 3:56 PM, <st1:PersonName w:st="on">NW Modeling List</st1:PersonName>
wrote:<br>
<br>
Hi<br>
<br>
I have fitted the above decoder into my Bachmann J which previously<br>
had the DCC ready decoder.<br>
<br>
All works well and I am very pleased, but, the lights don't work. The<br>
generator sound comes on but no lights on the loco.<br>
<br>
Any ideas please?<br>
<br>
Many Thanks<br>
<br>
Barry Reeves<br>
Songwriter & Musician<br>
www.northwestlondonblues.co.uk <<a
href="http://www.northwestlondonblues.co.uk/">http://www.northwestlondonblues.co.uk/</a>>
<br>
<br>
<br>
<br>
</span></font><o:p></o:p></p>
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