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I would second what Bill said, I like the hack saw idea, and if you
go low and slow, you may be able to save the threads. I have a
couple of old screw drivers that I heated and bent the end to a U
shaped hook for things like this. You could reach through, and keep
outward pressure on the section you are working on, so it comes out
in the right direction. <br>
<br>
Good Luck!<br>
Mike M<br>
<br>
<div class="moz-cite-prefix">On 7/20/2022 12:25 PM, Bill Brueck
wrote:<br>
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<p class="MsoNormal">Drilling and tapping sounds reasonable.
What’s on the inside at this point? If it’s another fitting
for an oil line to feed the sending unit, be careful you don’t
dig too far.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Another approach would be to split a hack
saw blade lengthwise so you can get it into the opening and
relieve the broken brass at 2, maybe 4 points. Then run the
brass thru a couple of heat/cool cycles gently with propane.
I expect then you could then chip out the pieces. I keep a
couple of broken screw drivers shafts, sharpened to a point to
one side, just for projects like this. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">For the debris removal, since this is a
pressurized opening, just start the engine up with the hole
open. It’ll make a mess but it should clean things out.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">B²<o:p></o:p></p>
<p class="MsoNormal">Bill Brueck<o:p></o:p></p>
<p class="MsoNormal"> Pine Island, MN USA<o:p></o:p></p>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>From:</b> AT
<a class="moz-txt-link-rfc2396E" href="mailto:at-bounces@lists.antique-tractor.com"><at-bounces@lists.antique-tractor.com></a> <b>On Behalf
Of
</b>Gunnells, Brad R<br>
<b>Sent:</b> Wednesday, July 20, 2022 9:28 AM<br>
<b>To:</b> Antique tractor email discussion group
<a class="moz-txt-link-rfc2396E" href="mailto:at@lists.antique-tractor.com"><at@lists.antique-tractor.com></a><br>
<b>Subject:</b> [AT] IH 656<o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Ok, seems we need a little tractor talk
here (but I wish I weren’t asking this!).<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">My dad went to replace the oil pressure
sending unit on his IH 656. The sending unit was fitted into a
brass elbow that screwed into the block. When he put the
wrench on the sending unit it broke the elbow. So…here we are.
We presumed that being brass it shouldn’t weld itself to the
block and should just spin out with an easy out. Wrong! That
little bastard is stuck in there good! Feeling a twist in the
easy-out we didn’t want to risk breaking it off in there and
compound the problem. We thought about using heat on the block
as you would a steel bolt, but given the proximity we didn’t
want to get things hot and cause a leak in the nearby gasket
for what I presume is the timing gear cover.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Being brass we thought maybe we could take
a sharpened punch and cut through and break the remaining part
out of the block. While we got some of it, it didn’t really do
what we’d hoped. I think we’re down to trying to drill it out.
But I’m not fond of this idea as it’s an oil passage and any
metal in there could be disastrous.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I figured I’d throw this out to the group
and see if there’s anything we could/should do different? If
we do indeed go the drill route we’d probably dip the bit in
some grease to try and get any shavings to cling to the bit
and remove it frequently to clean it off. Hopefully avoiding
metal shavings inside. Then prior to installing the new
pressure switch crank the tractor for a moment and let it push
some engine oil out of the block hopefully flushing any
debris.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Am I overlooking anything, or other
options? I’ll also attempt to add a picture.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Thanks for any suggestions<br>
Brad<o:p></o:p></p>
<p class="MsoNormal"><img style="width:10.0in;height:13.3333in"
id="Picture_x0020_1"
src="cid:part1.L7xS80jA.Wk18KbeU@gmx.com" class=""
width="960" height="1280"><o:p></o:p></p>
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