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My leaky sediment bowl

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Mike CA

11-25-2007 17:26:15




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Here are a couple pics of my sediment bowl. The fuel was very slowly coming out of the 'OUT' end when I had the shut off completely closed. I even wrenched it down, but no luck. The fuel kept seeping through.
Here is a bad pic of where the valve sits in.
third party image

And here is the valve. As you can see, there is some slight wear in the tip, but I can't see that it made a groove. Also, if I understand what people have told me, there is supposed to be something in the nut behind the part that screws in to the top? I honestly can't figure out why something needs to be in there, and why it would cause a leak if it wasn't there.
third party image

Any ideas on what to do about the leak would be greatly appreciated.

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Mike CA

11-25-2007 23:09:01




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 Re: My leaky sediment bowl in reply to Mike CA, 11-25-2007 17:26:15  

Bob said: In the area of the shutoff valve that's visible in your photo, you can see a "ring" where the vavle is seating, and a "divot" where it is NOT contacting the seat, and will leak. The red arrow marks the "divot"


Yeah, I saw that after I posted the picture. I missed it just looking at it.

Now, the question is... how do I even that all out to make a good seal all around?

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Bob

11-26-2007 08:23:04




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 Re: My leaky sediment bowl in reply to Mike CA, 11-25-2007 23:09:01  
Find someone with a small lathe, or POSSIBLY chuck it in a drillpress and hold a file against it at the angle of the seat area.



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Bob

11-25-2007 21:17:37




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 Re: My leaky sediment bowl in reply to Mike CA, 11-25-2007 17:26:15  
In the area of the shutoff valve that's visible in your photo, you can see a "ring" where the vavle is seating, and a "divot" where it is NOT contacting the seat, and will leak. The red arrow marks the "divot"...

Third Party Image



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Mike CA

11-25-2007 18:31:51




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 Re: My leaky sediment bowl in reply to Mike CA, 11-25-2007 17:26:15  

ScottyHOMEy said: However you go about it, packing will help solve your problem.


Could you explain to me how? I just don't understand the physics of the packing, and what it is for?



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ScottyHOMEy

11-25-2007 18:47:45




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 Re: My leaky sediment bowl in reply to Mike CA, 11-25-2007 18:31:51  
As you thread the face of the valve in towards its seat, the back of the shaft (toward the knob you're turning opens up. Without packing, the fuel would flow straight back through and around the shaft of your knob. The packing wraps around the shaft and keeps it from leaking around the shaft and through the gap between the shaft and the hole in the nut.



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Pete7

11-25-2007 17:57:10




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 Re: My leaky sediment bowl in reply to Mike CA, 11-25-2007 17:26:15  
Hi Mike CA.. A few thoughts. In your earlier post you didn't say exactly where it was leaking. So, some people figured it was not shutting off completly, others probably thought it was leaking out around the stem of the shut off lever and still others thought it was leaking out over the top of the bowl.
If gas was leaking out around the stem of the shut off lever then the suggestion to tighten the gland nut made sense as did the suggestion to put more packing behind the gland nut. But, since your problem is that the shut off valve does not shut off, those other suggestions probably won't help. It that a pited area I see on your valve tip? I see the circlular ring, but at about the 12 O'clock position on the tip it looks like a pitted grove. Is it deep enough that your fingernail can feel it? If so, then that spot could be letting the gas escape. You might be able to polish it out.

Pete

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GeneMO

11-25-2007 18:28:08




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 Re: My leaky sediment bowl in reply to Pete7, 11-25-2007 17:57:10  
Pete, you got good eyes, I didn't notice that pitted looking area the first time I looked at the pic ( by the way Mike, good pictures, nice close up, your camera have a close up option).

Anyway that could sure cause it to not shut off.

Gene



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ScottyHOMEy

11-25-2007 17:46:40




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 Re: My leaky sediment bowl in reply to Mike CA, 11-25-2007 17:26:15  
I don't see a groove , Mike. What I see is wear on the high spots . That's where it IS sealing. If you have a leak on that surface, it's flowing over the shiny spots. The dull ones are where you are sealed.

Not all that atypical for such a valve.

Yes, there should be "something" inside the nut behind it all. It's called packing. Easiest to find and most common is a soft rubber rope with a metallic looking covering that you can wrap around the shaft. Some folks use O-rings.

However you go about it, packing will help solve your problem.

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