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<p>Spencer:</p>
<p>It really doesn't need to be welded continuously. I would
suggest a 1inch long weld every 6 inches or so. Hopefully the
groove is on the bottom so water will drain...........<br>
Always think of things like that after they are done.. If you
want to keep the groove apart while welding, I would insert he
inner tube, and then drive a welding rod in the groove. or, a
strip of 1/8 or 3/16 HRMS would hold it open and then you would
only have to weld on each side. I would try to NOT push the
strip down to where it was touching the inner tube. Twist the
inner tube to be sure that it has plenty of clearance. If the
groove is where water will run into it, and you don't want to
weld continuously, Silicone sealant will seal it. If you do weld
continuously, only weld about 2 inches at a time, then go to the
other end. and after about 6 welds I would let it cool
completely. It will curl due to the weld shrinkage in a
heartbeat.. A mixture of Never seize and grease would also help
the inner tube to stay free. If there is any way you could
replace that outer tube, it would probably save time. Around here
we use 2-3/8 and 2-7/8 oil patch tubing to make sliding
pipes.....</p>
<p>Just my $0.02. In my earlier years, I did a lot of "thawing"
frozen parts. Without my Dad around to help, and my joint
problems, I don't get a lot done any more. It takes all my time
just to take care of my cows and keep my hay equipment running. <br>
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<p>Cecil in OKla<br>
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<div class="moz-cite-prefix">On 2/22/2018 4:25 PM, Spencer Yost
wrote:<br>
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cite="mid:F7C013C0-EC57-488D-957E-C26EE88B956D@triad.rr.com">
<pre wrap="">Had to be home today for a personal errand , so I had a chance to try to separate the Haywagon. Chained the rear to a tree and pulled. Even with penetrant soaking for a few days after cutting a groove in the tube, a bobcat could not pull that thing apart. So I tried twisting by picking up one front tire with the bobcat bucket and it did create a twist. So I set it back down and pushed to twist it back. Try pulling again and it still wouldn't separate. So I picked up the other front tire and got it to twist. Set it back down. This time it pulled apart ever so slowly but it finally came.
I am so glad I didn't bother with any other method and went straight to Cecil's solution of cutting a slot in the tube. After heating grooving, soaking, twisting it still took a bobcat to pull it apart. I think that thing was close to rust welding itself.
Here's a picture of the groove in the picture of rust on the inner tube.
Next will come welding. I guess I'll have to be careful not to weld the innertube to the outer tube :-). I'm afraid to weld it without the inner tube in place because if I get some slag/welding material below the groove i will have a hard time grinding it out so that the innertube can slide in.
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