<html><head></head><body><div style="font-family: Verdana;font-size: 12.0px;"><div>Hi John, I'm sorry for the late reply reply, for some reason your email went into my junk folder, I am going to try to intall a bushing the oblonged hole. Time will tell.</div>
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<div>Thanks,</div>
<div>Mike M</div>
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<div style="margin:0 0 10px 0;"><b>Sent:</b> Tuesday, May 11, 2021 at 10:59 PM<br/>
<b>From:</b> jdnut@aol.com<br/>
<b>To:</b> "at@lists.antique-tractor.com" <at@lists.antique-tractor.com><br/>
<b>Subject:</b> Re: [AT] Bush Hog</div>
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<div style="color: black;font: 12.0pt Arial , Helvetica , sans-serif;">Mike,
<div>I was able to find a bushing to do this exact thing at a local hardware store here in Ferndale. I did try to fill in a slight divot on each side with a wire feed welder, but I have not perfected my welding skills at this point in time. A little time with an angle grinder and then a file, and I felt I had a pretty good fit. In the end, I did get a slip clutch for the PTO drive, my machine is a flail mower, not near the rotating mass of a bush hog, but the Deere 755 I use with the flail mower has a real fast acting brake on the PTO when you take it out. It took a little time getting the adjustment right, but last I checked, it slips just a tad when I inactivate the PTO. That has seemed to make my shear pins last a lot longer. </div>
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<div>Good Luck,</div>
<div>John </div>
<div>Ferndale, CA
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<div style="font-family: helvetica , arial;font-size: 10.0pt;color: black;"><font size="2">-----Original Message-----<br/>
From: Mike M <meulenms@gmx.com><br/>
To: at@lists.antique-tractor.com<br/>
Sent: Tue, May 11, 2021 7:14 pm<br/>
Subject: Re: [AT] Bush Hog</font><br/>
<div><font size="2">Thanks guys, where would I find such a bushing? I don't weld but have a<br clear="none"/>
son in law that can.<br clear="none"/>
<br clear="none"/>
thank-you<br clear="none"/>
<br clear="none"/>
Mike M<br clear="none"/>
<br clear="none"/>
<br clear="none"/>
On 5/11/2021 9:54 PM, <a href="mailto:szabelski@wildblue.net" onclick="parent.window.location.href='mailto:szabelski@wildblue.net'; return false;" target="_blank">szabelski@wildblue.net</a> wrote:<br clear="none"/>
> Simply drilling it out might weaken it to the point of snapping under load. You’d have to drill it to a standard bolt size which might be larger than you really want it to be. I would drill it to the minimum size necessary to get it round again and insert a bushing to bring it back to near spec. Then I would weld the bushing in so that you restore some strength to the shaft. Another option would be to drill a new hole 180 from the existing hole and fill in the old hole with weld. Good luck!<br clear="none"/>
><br clear="none"/>
><br clear="none"/>
> Carl<br clear="none"/>
><br clear="none"/>
> ----- Original Message -----<br clear="none"/>
> From: Mike M <<a href="mailto:meulenms@gmx.com" onclick="parent.window.location.href='mailto:meulenms@gmx.com'; return false;" target="_blank">meulenms@gmx.com</a>><br clear="none"/>
> To: Antique tractor email discussion group <<a href="mailto:at@lists.antique-tractor.com" onclick="parent.window.location.href='mailto:at@lists.antique-tractor.com'; return false;" target="_blank">at@lists.antique-tractor.com</a>><br clear="none"/>
> Sent: Tue, 11 May 2021 20:06:11 -0400 (EDT)<br clear="none"/>
> Subject: [AT] Bush Hog<br clear="none"/>
><br clear="none"/>
> Hey Guys, I have a question. I have an older John Deere Bush hog. I<br clear="none"/>
> believe it's a 720 model. I bought it at an auction for $400 bucks and<br clear="none"/>
> have used it for 5 years so it doesn't owe me anything. I use it to mow<br clear="none"/>
> pasture, not hard use. I'm sick and tired of replacing shear pins. Upon<br clear="none"/>
> further inspection the shaft out of the gear box has become ob-longed<br clear="none"/>
> over the years, which allows the shear bolt to have some slop in it. Do<br clear="none"/>
> I drill out the ob-longed hole and use a larger bolt or what? Any thoughts?<br clear="none"/>
><br clear="none"/>
> Thanks,<br clear="none"/>
> Mike M<br clear="none"/>
><br clear="none"/>
> --<br clear="none"/>
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