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Subject: Sediment bowl valve stem

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Larry    Posted 11-13-2021 at 14:34:07 [URL] [DELETE]        [Reply] [Email]  
  • Sediment bowl valve stem
  • My NAA was leaking through the valve stem and I ordered another one. After reading Tim's How to article, I tried to remove the old one, but even though the retaining nut is completely free, the stem won't come out. I am reluctant to "force it" because I don't want to damage the bowl assembly or the gas tank. Any suggestions from Tim or anyone else to remove it will be appreciated. Thanks.

    Steve N Mi.    Posted 11-15-2021 at 04:21:11 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Sediment bowl valve stem
  • What you are referring to as a retaining nut is a nut that secures the packing material around the valve stem. Often it is only necessary to tighten the packing nut some to make a good seal around the valve stem. I like to keep the packing nut in place (not tight) to keep alignment on the valve stem while I gently turn the valve stem counterclockwise to remove it. Once the stem has been unseated then the packing nut can be removed in order that the entire valve stem can be removed. (I assume you have drained the gas tank already).

    Sometimes simply adding a bit more packing thread under the packing nut and tightening the nut can fix a leak around the valve stem. This procedure may not require draining the tank depending on the free length of valve stem to provide room to install more seal thread.

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