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In prep for stacking gears on the main shaft, you need to pre-install
the bushes to determine the required thickness of the circlip You se the
clearance by selecting the right thickness washer. As stated all too
often you need to RTFM.  improper assy will be short lived. You'll be
pulling the tranny again MUCH sooner than expected as 2nd gear CRUNCH
will not be avoidable when the clip goes out again. You even need to pay
attention to which side of the clip faces the splines. The SQUARE edge
needs to face the spline lips.
The rounded one leads to exactly what has destroyed your shaft as pictured
ptegler
On 3/19/2023 7:52 PM, aribert neumann wrote:
> Next question - my (new) replacement main shaft is oversize in a
> couple of places. Â The diameter under the 2nd & 3rd gear bushings (I
> have opened up the bushings to only have a light interference fit).Â
> Worst is the diameter under the rear bearing. I can install the
> bearing but I have to hammer it ***hard*** to get it to fit on the
> shaft - can't be good for the bearing - guessing I might change the
> inner race diameter a miniscule amount. I'm thinking of sending this
> main shaft back to Spitbits and reusing my old main shaft. I have
> cleaned up the groove for the split collars on my lathe. The other
> damage on the shaft is on the nose where the cage bearing rides in the
> input shaft - this damage is only on one side of the shaft and only on
> half of the bearing surface (fore/aft). I am already going to replace
> the cage bearing with a bearing bronze bushing since the surface
> inside the input shaft pocket is showing wear also. The max amount of
> surface missing on the nose of the old main shaft is 0.003 in
> diameter.  Images: exploded view from Bentley manual, nose of the
> old, worn mainshaft
>
> Your thoughts and suggestions please - off in digest mode awaiting
> your responses. Trying to formulate a new plan of attack for Monday
> morning.
>
>
>
> **triumphs@autox.team.net **
>
> Donate:http://www.team.net/donate.html
> Archive:http://www.team.net/pipermail/triumphs http://www.team.net/archive
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--
Paul Tegler
ptegler@verizon.net www.teglerizer.com
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<p>In prep for stacking gears on the main shaft, you need to
pre-install the bushes to determine the required thickness of the
circlip You se the clearance by selecting the right thickness
washer. As stated all too often you need to RTFM.  improper assy
will be short lived. You'll be pulling the tranny again MUCH
sooner than expected as 2nd gear CRUNCH will not be avoidable when
the clip goes out again. You even need to pay attention to which
side of the clip faces the splines. The SQUARE edge needs to face
the spline lips.<br>
The rounded one leads to exactly what has destroyed your shaft as
pictured</p>
<p>ptegler</p>
<p><br>
</p>
<div class="moz-cite-prefix">On 3/19/2023 7:52 PM, aribert neumann
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAGkVM2_qddwDt8R2M5Wx1mGzUgXgX1kQH6noupRw_yA7JqY-BQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">Next question - my (new)
replacement main shaft is oversize in a couple of places.Â
 The diameter under the 2nd & 3rd gear bushings (I have
opened up the bushings to only have a light interference
fit). Worst is the diameter under the rear bearing. I can
install the bearing but I have to hammer it ***hard*** to
get it to fit on the shaft - can't be good for the bearing -
guessing I might change the inner race diameter a miniscule
amount. I'm thinking of sending this main shaft back to
Spitbits and reusing my old main shaft. I have cleaned up
the groove for the split collars on my lathe. The other
damage on the shaft is on the nose where the cage bearing
rides in the input shaft - this damage is only on one side
of the shaft and only on half of the bearing surface
(fore/aft). I am already going to replace the cage bearing
with a bearing bronze bushing since the surface inside the
input shaft pocket is showing wear also. The max amount of
surface missing on the nose of the old main shaft is 0.003
in diameter.  Images: exploded view from Bentley manual,
nose of the old, worn mainshaft<br>
</div>
<div dir="ltr">
<div><br>
</div>
<div>Your thoughts and suggestions please - off in digest
mode awaiting your responses. Trying to formulate a new
plan of attack for Monday morning.</div>
<div><br>
</div>
<div><br>
</div>
</div>
</div>
</div>
<br>
<fieldset class="moz-mime-attachment-header"></fieldset>
<pre class="moz-quote-pre" wrap="">** <a class="moz-txt-link-abbreviated"
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **
Archive: <a class="moz-txt-link-freetext"
href="http://www.team.net/pipermail/triumphs";>http://www.team.net/pipermail/triumphs</a>
<a class="moz-txt-link-freetext"
href="http://www.team.net/archive";>http://www.team.net/archive</a>
</pre>
</blockquote>
<pre class="moz-signature" cols="72">--
Paul Tegler
<a class="moz-txt-link-abbreviated"
href="mailto:ptegler@verizon.net";>ptegler@verizon.net</a> <a
class="moz-txt-link-abbreviated"
href="http://www.teglerizer.com";>www.teglerizer.com</a></pre>
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** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
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