pipe compound with teflon in it


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Old 10-21-12, 08:12 AM
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pipe compound with teflon in it

Yesterday I made some line repairs and installed another shutoff. I used pipe thread compound with teflon in it on some of those fittings. This morning I discover my fuel pump is shot (webster M34DJ-3). So my question is what does teflon do to fuel pumps and will it cause further damage if I just replace it without pulling those fittings. I have a beckett model AF-15 burning kerosine. Thanks
 
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Old 10-21-12, 10:24 AM
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AFAIK pipe compound is correctly applied so that it can never get in the lines...just like tape. You start a few threads back so that when tightening it moves the stuff away from the flow path.

If you did that, then it was prob coincidence that the pump failed.
 
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Old 10-21-12, 11:15 AM
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Teflon is not the best joint compound for use with fuel oils. I prefer Permatex number 2 compound.

That stated, I agree with Gunguy that unless you had gobs of the Teflon on the threads the failure of your fuel pump was coincidental.
 
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Old 10-21-12, 11:33 AM
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Could the pump have lost its prime?
 
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Old 10-21-12, 11:45 AM
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Thanks guys and yor right. I just took it apart and found no sign of anything that should not be there. There is a round metal ring with a star shape in the middle that turns inside of another part that is binding up. Do you know if I can get parts to rebuild this unit? If so where can I find them. Thanks
 
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Old 10-21-12, 11:53 AM
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I did need to reprime after installing the shut off. It then ran normal untill this morning when it seized up. I Pulled it apart to discover the fuel pump was turning harder than it should.
 
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Old 10-21-12, 12:03 PM
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Those pumps are made to be used with #2 fuel oil. The kerosene you have been using does not have sufficient lubricating properties.
 
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Old 10-21-12, 12:27 PM
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Is there a replacement pump that would be suitable for both straight Kero and #2 as well as mixtures of both to replace this OEM pump? I live in northern Ny and the tank is outside.
 
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Old 10-22-12, 07:09 PM
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I've had good luck with the Suntec A2VA-7116. Any pump used on straight kero will fail sooner than it would pumping #2 fuel oil but if it lasts 5 years or more, that's not bad.
 
 

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