Fairchild Club Forum

--- In fairchildclub@yahoogroups.com, "Frank" wrote:
>
> Folks, Am I correct in thinking that there are seals that fit around the shafts of the fuel shut off valves?
>
> I have one retaining nut with what looks like the remains of a seal held in by a brass washer which I do not want to force out yet, and the other has nothing, but there is an unthreaded area at the base of the nut below the thread that looks like it should have a seal or something.
>
> If seals should be there what are people using for both the seal and retaining washers? or are you all relying on a well seated valve body to prevent any leaks!
>
> Any guidance will be very much appreciated.
>
> Frank
>
> UC61K G-BCBL
>

----- Original Message -----
From: Tom
To: fairchildclub@yahoogroups.com
Sent: Monday, June 06, 2011 6:07 PM
Subject: [fairchildclub] Re: F24 Fuel valve shaft seals?



Frank,
When I got my Fairchild both shutoff valves weeped to a small degree. Still it was something I wasn't going to live with. After tearing them down a number of times I have come to the conclusion, the cone and the seat must be just about perfect. You can lap this yourself. Take your time, make'm smooth as glass. I don't think the "O" ring or small packings with a brass ring were ever meant to seal anything, but a way of appling pressure to the spring to keep the cone nicely seated. Brass ring faces the spring, then the packing, then the outside nut. Nut doesn't need to be that tight. Make any sense?

Tom
Hanford,Ca

--- In fairchildclub@yahoogroups.com, "Frank" wrote:
>
> Folks, Am I correct in thinking that there are seals that fit around the shafts of the fuel shut off valves?
>
> I have one retaining nut with what looks like the remains of a seal held in by a brass washer which I do not want to force out yet, and the other has nothing, but there is an unthreaded area at the base of the nut below the thread that looks like it should have a seal or something.
>
> If seals should be there what are people using for both the seal and retaining washers? or are you all relying on a well seated valve body to prevent any leaks!
>
> Any guidance will be very much appreciated.
>
> Frank
>
> UC61K G-BCBL
>





[Non-text portions of this message have been removed]

----- Original Message -----
From: Tom
To: fairchildclub@yahoogroups.com
Sent: Monday, June 06, 2011 6:07 PM
Subject: [fairchildclub] Re: F24 Fuel valve shaft seals?

Frank,
When I got my Fairchild both shutoff valves weeped to a small degree. Still
it was something I wasn't going to live with. After tearing them down a
number of times I have come to the conclusion, the cone and the seat must be
just about perfect. You can lap this yourself. Take your time, make'm smooth
as glass. I don't think the "O" ring or small packings with a brass ring
were ever meant to seal anything, but a way of appling pressure to the
spring to keep the cone nicely seated. Brass ring faces the spring, then the
packing, then the outside nut. Nut doesn't need to be that tight. Make any
sense?

Tom
Hanford,Ca

--- In fairchildclub@yahoogroups.com
, "Frank" wrote:
>
> Folks, Am I correct in thinking that there are seals that fit around the
shafts of the fuel shut off valves?
>
> I have one retaining nut with what looks like the remains of a seal held
in by a brass washer which I do not want to force out yet, and the other has
nothing, but there is an unthreaded area at the base of the nut below the
thread that looks like it should have a seal or something.
>
> If seals should be there what are people using for both the seal and
retaining washers? or are you all relying on a well seated valve body to
prevent any leaks!
>
> Any guidance will be very much appreciated.
>
> Frank
>
> UC61K G-BCBL
>

[Non-text portions of this message have been removed]





[Non-text portions of this message have been removed]

--- In fairchildclub@yahoogroups.com, "F.J. & D.A. Cox" wrote:
>
> Certainly does make sense, thank you Tom, - I am nowhere near flying and having fuel anywhere close to the valves. However I have lapped the cones, in antiucipation, with 'Fine' valve grinding paste - should I get something finer to get the 'Mirror' finish you mention?
>
> Frank
> Devon UK
>
>
> ----- Original Message -----
> From: Tom
> To: fairchildclub@yahoogroups.com
> Sent: Monday, June 06, 2011 6:07 PM
> Subject: [fairchildclub] Re: F24 Fuel valve shaft seals?
>
>
>
> Frank,
> When I got my Fairchild both shutoff valves weeped to a small degree. Still it was something I wasn't going to live with. After tearing them down a number of times I have come to the conclusion, the cone and the seat must be just about perfect. You can lap this yourself. Take your time, make'm smooth as glass. I don't think the "O" ring or small packings with a brass ring were ever meant to seal anything, but a way of appling pressure to the spring to keep the cone nicely seated. Brass ring faces the spring, then the packing, then the outside nut. Nut doesn't need to be that tight. Make any sense?
>
> Tom
> Hanford,Ca
>
> --- In fairchildclub@yahoogroups.com, "Frank" wrote:
> >
> > Folks, Am I correct in thinking that there are seals that fit around the shafts of the fuel shut off valves?
> >
> > I have one retaining nut with what looks like the remains of a seal held in by a brass washer which I do not want to force out yet, and the other has nothing, but there is an unthreaded area at the base of the nut below the thread that looks like it should have a seal or something.
> >
> > If seals should be there what are people using for both the seal and retaining washers? or are you all relying on a well seated valve body to prevent any leaks!
> >
> > Any guidance will be very much appreciated.
> >
> > Frank
> >
> > UC61K G-BCBL
> >
>
>
>
>
>
> [Non-text portions of this message have been removed]
>