[AT] Bush Hog

[jdnut at aol.com]

Mike, 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.  
Good Luck,John Ferndale, CA


-----Original Message-----
From: Mike M <meulenms at gmx.com>
To: at at lists.antique-tractor.com
Sent: Tue, May 11, 2021 7:14 pm
Subject: Re: [AT] Bush Hog

Thanks guys, where would I find such a bushing? I don't weld but have a
son in law that can.

thank-you

Mike M


On 5/11/2021 9:54 PM, szabelski at wildblue.net wrote:
> 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!
>
>
> Carl
>
> ----- Original Message -----
> From: Mike M <meulenms at gmx.com>
> To: Antique tractor email discussion group <at at lists.antique-tractor.com>
> Sent: Tue, 11 May 2021 20:06:11 -0400 (EDT)
> Subject: [AT] Bush Hog
>
> Hey Guys, I have a question.  I have an older John Deere Bush hog. I
> believe it's a 720 model. I bought it at an auction for $400 bucks and
> have used it for 5 years so it doesn't owe me anything. I use it to mow
> pasture, not hard use. I'm sick and tired of replacing shear pins. Upon
> further inspection the shaft out of the gear box has become ob-longed
> over the years, which allows the shear bolt to have some slop in it. Do
> I drill out the ob-longed hole and use a larger bolt or what? Any thoughts?
>
> Thanks,
>   Mike M
>
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