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John Deere Tractors Discussion Forum
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'39 B ? Removing Pipe Nipple

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Ken Reese

10-24-2003 07:26:52




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Working on my '39 "B."

Instead of the original cooling system drain plug in the head, a pipe nipple about 2-3" long has been screwed into the head and then a pipe cap was used in place of the plug.

I haven't disassembled the engine so I'm working from the underside of the tractor and I can't get the nipple loose using a pipe wrench. Any suggestions?

FYI: I don't have an acetylene torch. MAP gas is the best I have.

Thanks,
Ken Reese

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CJDAve

10-24-2003 16:58:54




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 Re: '39 B ? Removing Pipe Nipple in reply to Ken Reese, 10-24-2003 07:26:52  
Yes, your Methly-Acetyl-Propadiene torch will work. Just heat the pipe nipple from the inside if possible and get it to swell up and crush the rust. The pipe nipple will shrink back farther than it was and as was mentioned.....practically fall out by itself.



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G-MAN

10-24-2003 07:44:24




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 Re: '39 B ? Removing Pipe Nipple in reply to Ken Reese, 10-24-2003 07:26:52  
Heating is probably your best bet. Even one of those little propane torches that screws on the top of a small bottle would probably do that. Pipe-taper threads are nice in that if they shrink even a little bit, they loosen a bunch. I've removed pipe plugs that I swore would never come out just by heating them to a dull red, and then letting them cool. Usually, they'll spin out by hand. I'm not familiar with the MAP torch, but find some way to apply some heat to it.

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