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    <p>Bill:</p>
    <p>You wouldn't happen to have the flywheel weight for the H,
      perchance? At a guess I'd place it at around 100 lbs, since an H
      is slightly smaller than a B, but I've never seen the figures.<br>
    </p>
    <p>Thanks,</p>
    <p>Mark J</p>
    <p>"dad" to Little Johnny, H-17616<br>
    </p>
    <div class="moz-cite-prefix">On 6/30/2020 11:43 PM, Bill Brueck
      wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:BYAPR08MB5991EF257F5D39C9D4E00D9FC26C0@BYAPR08MB5991.namprd08.prod.outlook.com">
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        <p class="MsoNormal">Interesting question and comment about
          flywheel and crankshaft weights.  And I’ve been wondering
          about flywheel weights as I have a G and a 70 that need to
          come apart sometime soon.  As a younger man I would have
          tackled them, but they’ll be managed with a hoist now.  The
          older I get the better I was…<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">The Deere Master Parts Index, last
          published about 1970,  has the weight of many or most parts, I
          suppose to help in estimating shipping cost.  An online
          version of this catalog is available at
          <a href="http://www.b2parts.com" moz-do-not-send="true">www.b2parts.com</a>. 
          If you use the online parts index, note that the user ID and
          password are contained in the explanatory material at the
          entry page. 
          <o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Anyway, following are weights for a
          sampling of 2-cylinder engines.  I tried to use the later
          models for the letter series, although the entry for some of
          them was missing the weight information so I reverted to an
          earlier model of the same tractor.  <o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
        <p class="MsoNormal">Regarding the crankshaft weight
          contributing to the inertia, remember that the flywheel
          inertia is a lot more the further the weight is from the
          center.  Thus although the crankshaft is substantial in
          weight, it’s close in and doesn’t contribute proportionally to
          the flywheel effect.  The D flywheel below isn’t one of the
          heavier ones but as I look at my D the flywheel is
          substantially larger in diameter than any of the others.<o:p></o:p></p>
        <p class="MsoNormal"><o:p> </o:p></p>
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          style="border-collapse:collapse;border:none" cellspacing="0"
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                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
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                <p class="MsoPlainText">Model<o:p></o:p></p>
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              <td style="width:93.5pt;border:solid windowtext
                1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt"
                width="125" valign="top">
                <p class="MsoPlainText">FW <o:p></o:p></p>
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                1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt"
                width="125" valign="top">
                <p class="MsoPlainText">FW #<o:p></o:p></p>
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              <td style="width:93.5pt;border:solid windowtext
                1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt"
                width="125" valign="top">
                <p class="MsoPlainText">Crank<o:p></o:p></p>
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              <td style="width:93.5pt;border:solid windowtext
                1.0pt;border-left:none;padding:0in 5.4pt 0in 5.4pt"
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                <p class="MsoPlainText">Crank #<o:p></o:p></p>
              </td>
            </tr>
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              <td style="width:93.5pt;border:solid windowtext
                1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
                width="125" valign="top">
                <p class="MsoPlainText">B<o:p></o:p></p>
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              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
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                <p class="MsoPlainText">AB3844R<o:p></o:p></p>
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              <td
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                valign="top">
                <p class="MsoPlainText">113<o:p></o:p></p>
              </td>
              <td
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                valign="top">
                <p class="MsoPlainText">AB2752R<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
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                valign="top">
                <p class="MsoPlainText">60<o:p></o:p></p>
              </td>
            </tr>
            <tr>
              <td style="width:93.5pt;border:solid windowtext
                1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
                width="125" valign="top">
                <p class="MsoPlainText">A<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText">AA2367R<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
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                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText">155<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
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                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText">AA3926R<o:p></o:p></p>
              </td>
              <td
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                valign="top">
                <p class="MsoPlainText">89<o:p></o:p></p>
              </td>
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                <p class="MsoPlainText">G<o:p></o:p></p>
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                <p class="MsoPlainText">AF689R<o:p></o:p></p>
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              <td
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                <p class="MsoPlainText">181<o:p></o:p></p>
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              <td
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                <p class="MsoPlainText">AF1314R<o:p></o:p></p>
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              <td
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                <p class="MsoPlainText">112<o:p></o:p></p>
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                1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
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                <p class="MsoPlainText">D<o:p></o:p></p>
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                valign="top">
                <p class="MsoPlainText">AD852R<o:p></o:p></p>
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                valign="top">
                <p class="MsoPlainText">145<o:p></o:p></p>
              </td>
              <td
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                valign="top">
                <p class="MsoPlainText">AD838R<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
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                valign="top">
                <p class="MsoPlainText">185<o:p></o:p></p>
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                1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
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                <p class="MsoPlainText">50<o:p></o:p></p>
              </td>
              <td
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                <p class="MsoPlainText">AB3844R<o:p></o:p></p>
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              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
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                <p class="MsoPlainText">113<o:p></o:p></p>
              </td>
              <td
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                <p class="MsoPlainText">AB4684R<o:p></o:p></p>
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              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
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                valign="top">
                <p class="MsoPlainText">65<o:p></o:p></p>
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                1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
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                <p class="MsoPlainText">60<o:p></o:p></p>
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                <p class="MsoPlainText">AA4240R<o:p></o:p></p>
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              <td
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                <p class="MsoPlainText">Missing entry<o:p></o:p></p>
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              <td
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                valign="top">
                <p class="MsoPlainText">AA6009R<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
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                valign="top">
                <p class="MsoPlainText">91<o:p></o:p></p>
              </td>
            </tr>
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              <td style="width:93.5pt;border:solid windowtext
                1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
                width="125" valign="top">
                <p class="MsoPlainText">70<o:p></o:p></p>
              </td>
              <td
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                valign="top">
                <p class="MsoPlainText">AF1646R<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
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                valign="top">
                <p class="MsoPlainText">181<o:p></o:p></p>
              </td>
              <td
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                <p class="MsoPlainText">AF1366R<o:p></o:p></p>
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              <td
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                <p class="MsoPlainText">133<o:p></o:p></p>
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                <p class="MsoPlainText">70D<o:p></o:p></p>
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                <p class="MsoPlainText">AF2194R<o:p></o:p></p>
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                <p class="MsoPlainText">185<o:p></o:p></p>
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                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText">AF3748R<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText">144<o:p></o:p></p>
              </td>
            </tr>
            <tr>
              <td style="width:93.5pt;border:solid windowtext
                1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
                width="125" valign="top">
                <p class="MsoPlainText">720<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText">AF2609R<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText">176<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText">AF2730R<o:p></o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText">160<o:p></o:p></p>
              </td>
            </tr>
            <tr>
              <td style="width:93.5pt;border:solid windowtext
                1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
                width="125" valign="top">
                <p class="MsoPlainText"><o:p> </o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText"><o:p> </o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText"><o:p> </o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText"><o:p> </o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText"><o:p> </o:p></p>
              </td>
            </tr>
            <tr>
              <td style="width:93.5pt;border:solid windowtext
                1.0pt;border-top:none;padding:0in 5.4pt 0in 5.4pt"
                width="125" valign="top">
                <p class="MsoPlainText"><o:p> </o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText"><o:p> </o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText"><o:p> </o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
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                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText"><o:p> </o:p></p>
              </td>
              <td
                style="width:93.5pt;border-top:none;border-left:none;border-bottom:solid
                windowtext 1.0pt;border-right:solid windowtext
                1.0pt;padding:0in 5.4pt 0in 5.4pt" width="125"
                valign="top">
                <p class="MsoPlainText"><o:p> </o:p></p>
              </td>
            </tr>
          </tbody>
        </table>
        <p class="MsoPlainText">              <o:p></o:p></p>
        <p class="MsoPlainText"><o:p> </o:p></p>
        <p class="MsoPlainText">B²<o:p></o:p></p>
        <p class="MsoPlainText">Bill Brueck<o:p></o:p></p>
        <p class="MsoPlainText">Pine Island, MN<o:p></o:p></p>
        <p class="MsoPlainText">Confusion is a higher state of knowledge
          than ignorance.<o:p></o:p></p>
        <p class="MsoPlainText"><o:p> </o:p></p>
        <p class="MsoPlainText">-----Original Message-----<br>
          From: AT <a class="moz-txt-link-rfc2396E" href="mailto:at-bounces@lists.antique-tractor.com"><at-bounces@lists.antique-tractor.com></a> On
          Behalf Of Mark Johnson<br>
          Sent: Friday, June 19, 2020 6:58 AM<br>
          To: <a class="moz-txt-link-abbreviated" href="mailto:at@lists.antique-tractor.com">at@lists.antique-tractor.com</a><br>
          Subject: Re: [AT] John Deere Projects UPDATES</p>
        <p class="MsoPlainText"><o:p> </o:p></p>
        <p class="MsoPlainText">110 lbs for a Deere flywheel seems about
          right. The weight of the flywheel is almost independent of the
          engine size...730 flywheels aren't much over 100 lbs either.
          Apparently as the engines get bigger, the extra mass in the
          crankshaft provides enough moment of inertia to keep things
          running. Does anyone here remember how much the crankshafts
          weight in various larger two-cylinder engines? I know they
          aren't featherweights, given that the rod journals on a
          620/630/60/G are about 4" in diameter.<o:p></o:p></p>
        <p class="MsoPlainText"><o:p> </o:p></p>
        <p class="MsoPlainText">My recollection is that one stout feller
          can take one off, but it took two of us to put one on! The
          only task I can remember that was worse was replacing the main
          reduction gear, which on a 730 is 'interference fit'
          <o:p></o:p></p>
        <p class="MsoPlainText">- you have to heat the gear in hot oil
          to get it to slide onto the crankshaft! It's probably the same
          on the 620/630 but I didn't happen to be around when they (Pop
          & Grandpa) rebuilt that one. I do have a used<o:p></o:p></p>
        <p class="MsoPlainText">620 connecting rod in my junk iron
          collection.<o:p></o:p></p>
        <p class="MsoPlainText"><o:p> </o:p></p>
        <p class="MsoPlainText">Mark J<o:p></o:p></p>
        <p class="MsoPlainText"><o:p> </o:p></p>
        <p class="MsoPlainText">Columbia MO<o:p></o:p></p>
        <p class="MsoPlainText"><o:p> </o:p></p>
        <p class="MsoPlainText"><o:p> </o:p></p>
        <p class="MsoPlainText">On 6/18/2020 8:44 PM, <a
            href="mailto:lcmason@uslink.net" moz-do-not-send="true">
            <span style="color:windowtext;text-decoration:none">lcmason@uslink.net</span></a>
          wrote:<o:p></o:p></p>
        <p class="MsoPlainText">> I had a JD 520 that had a cracked
          flywheel. It also made a bad noise.
          <o:p></o:p></p>
        <p class="MsoPlainText">> It was not hitting anything, just
          shifting slightly on the shaft, It
          <o:p></o:p></p>
        <p class="MsoPlainText">> is similar to the noise that would
          occur if the flywheel was not
          <o:p></o:p></p>
        <p class="MsoPlainText">> tightened enough. It was quite a
          few years ago, and the flywheel
          <o:p></o:p></p>
        <p class="MsoPlainText">> didn't feel too heavy coming off,
          but the replacement seemed a lot
          <o:p></o:p></p>
        <p class="MsoPlainText">> heavier once I saw the shipping
          weight (110 lbs???) Larry Mason
          <o:p></o:p></p>
        <p class="MsoPlainText">> Hackensack MN<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> ----- Original Message -----<o:p></o:p></p>
        <p class="MsoPlainText">> From: <a
            href="mailto:szabelski@wildblue.net" moz-do-not-send="true"><span
              style="color:windowtext;text-decoration:none">szabelski@wildblue.net</span></a><o:p></o:p></p>
        <p class="MsoPlainText">> To: "Antique Tractor Email
          Discussion Group" <o:p></o:p></p>
        <p class="MsoPlainText">> <<a
            href="mailto:at@lists.antique-tractor.com"
            moz-do-not-send="true"><span
              style="color:windowtext;text-decoration:none">at@lists.antique-tractor.com</span></a>><o:p></o:p></p>
        <p class="MsoPlainText">> Sent: Thursday, June 18, 2020
          7:27:36 PM<o:p></o:p></p>
        <p class="MsoPlainText">> Subject: Re: [AT] John Deere
          Projects UPDATES<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> My bet is that you’re correct and
          that there is some displacement and that nut indicates it is
          where the most displacement occurs. That’s probably why the
          cracks and why the nut is beat up. Do you know what it was
          hitting against? I’d take a good look and see what it was
          hitting to make sure nothing else is damaged.<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> Probably explains the clutch
          burning also.<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> Carl<o:p></o:p></p>
        <p class="MsoPlainText">> ----- Original Message -----<o:p></o:p></p>
        <p class="MsoPlainText">> From: STEVE ALLEN <<a
            href="mailto:steveallen855@centurytel.net"
            moz-do-not-send="true"><span
              style="color:windowtext;text-decoration:none">steveallen855@centurytel.net</span></a>><o:p></o:p></p>
        <p class="MsoPlainText">> To: <a
            href="mailto:at@lists.antique-tractor.com"
            moz-do-not-send="true"><span
              style="color:windowtext;text-decoration:none">at@lists.antique-tractor.com</span></a><o:p></o:p></p>
        <p class="MsoPlainText">> Sent: Thu, 18 Jun 2020 20:08:07
          -0400 (EDT)<o:p></o:p></p>
        <p class="MsoPlainText">> Subject: [AT] John Deere Projects
          UPDATES<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> Well, gents, I have another update
          in the long saga.<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> Let's begin with the '51 A.  I
          acquired a mesh nozzle to go over the inlet of the sediment
          bowl so that I could pull the lawnmower tank off the side (I
          was afraid of catching it on a tree limb while working) until
          we can pull the tank to clean it right.  It is a tall, fine
          mesh that keeps the crud out, and, when we used the tractor,
          it worked very well:  plenty of gas, no clogging the inlet. 
          Not the permanent solution but a workable one.  Tractor did a
          great job finishing up the brush-hogging.  I still need to
          replace the points.<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> Now, the '49 A.  I thought I had
          bought a set of points for it, but I was wrong.  I did get a
          cap, however, and, after cleaning up the old points as well as
          I could and replacing the gap, we had a good spark.  The old
          boy cranked up on the third or fourth revolution.  Spiffy!<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> We pulled it out to run it some,
          and it seemed that there was a hammering in the engine.  There
          has always been a sensation of that, but it seemed obviously
          more apparent to me.  We did just a little work, but it seemed
          to be getting worse.  Also, the clutch was smoking when  it
          was disengaged.  No slipping, no noise, and it snapped in and
          out just fine, but, when disengaged, it smoked.  So we parked
          it.  Today, I had my son pull the flywheel cover off today,
          and we discovered the hammering problem (at least I'll bet): 
          Two cracks.  If the pic comes through, you should be able to
          see them near the lower, right nut.  there is obvious
          displacement of the casting, so I'll bet that puppy is loose
          on there.<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> So now we need to change the
          flywheel.  Fortunately, I have one.  We just need to figure
          out how to handle it (and also to set it in place correctly).<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> Briefly on the '47 B:  We need to
          test the starter and reinstall.  The generator is probably no
          good, so we'll just disconnect it.  I want to put good batt
          cables on it.  We'll probably work on it as we prepare to
          replace the flywheel on the '49.<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> It's always somethin', ain't it?<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">> The "original" Steve Allen<o:p></o:p></p>
        <p class="MsoPlainText">><o:p> </o:p></p>
        <p class="MsoPlainText">>
          _______________________________________________<o:p></o:p></p>
        <p class="MsoPlainText">> AT mailing list<o:p></o:p></p>
        <p class="MsoPlainText">> <a
            href="mailto:AT@lists.antique-tractor.com"
            moz-do-not-send="true"><span
              style="color:windowtext;text-decoration:none">AT@lists.antique-tractor.com</span></a><o:p></o:p></p>
        <p class="MsoPlainText">> <a
href="http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com"
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        <p class="MsoPlainText">>
          _______________________________________________<o:p></o:p></p>
        <p class="MsoPlainText">> AT mailing list<o:p></o:p></p>
        <p class="MsoPlainText">> <a
            href="mailto:AT@lists.antique-tractor.com"
            moz-do-not-send="true"><span
              style="color:windowtext;text-decoration:none">AT@lists.antique-tractor.com</span></a><o:p></o:p></p>
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        <p class="MsoPlainText">_______________________________________________<o:p></o:p></p>
        <p class="MsoPlainText">AT mailing list<o:p></o:p></p>
        <p class="MsoPlainText"><a
            href="mailto:AT@lists.antique-tractor.com"
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              style="color:windowtext;text-decoration:none">AT@lists.antique-tractor.com</span></a><o:p></o:p></p>
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href="http://lists.antique-tractor.com/listinfo.cgi/at-antique-tractor.com"
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      <pre class="moz-quote-pre" wrap="">_______________________________________________
AT mailing list
<a class="moz-txt-link-abbreviated" href="mailto:AT@lists.antique-tractor.com">AT@lists.antique-tractor.com</a>
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