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Proper Torque for Fuel Fittings

 
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Steve Waltner
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PostPosted: Sun Feb 13, 2005 9:45 pm    Post subject: Proper Torque for Fuel Fittings Reply with quote



I'm to the point of installing the fuel fittings on the fuel tanks on
my RV-8A project. I'm a little confused about what torque to set my
wrench at when installing the fitting.

The fitting that goes through the tank rib and 3/16" reinforcement
plate is an AN833-6D elbow with an AN924-6D nut on the outside. There
are also a pair of -4D fittings for the vent line which will soon be
mounted as well. The only torque chart that I'm ever able to find is
one for AN bolts/nuts. Since these are aluminum fittings, I don't dare
torque them to the same values.

Any assistance would be greatly appreciated.

Steve


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Juan Jimenez
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PostPosted: Sun Feb 13, 2005 10:20 pm    Post subject: Re: Proper Torque for Fuel Fittings Reply with quote



I was taught to use no more than 10-12 ft/lb of torque for AN aluminum
fittings, but why not call Van's to get the answer from the source?

"Steve Waltner" <swaltner-2005 (AT) cox (DOT) net> wrote

Quote:
I'm to the point of installing the fuel fittings on the fuel tanks on
my RV-8A project. I'm a little confused about what torque to set my
wrench at when installing the fitting.

The fitting that goes through the tank rib and 3/16" reinforcement
plate is an AN833-6D elbow with an AN924-6D nut on the outside. There
are also a pair of -4D fittings for the vent line which will soon be
mounted as well. The only torque chart that I'm ever able to find is
one for AN bolts/nuts. Since these are aluminum fittings, I don't dare
torque them to the same values.

Any assistance would be greatly appreciated.

Steve




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Morgans
Guest





PostPosted: Sun Feb 13, 2005 11:46 pm    Post subject: Re: Proper Torque for Fuel Fittings Reply with quote


"Steve Waltner" <swaltner-2005 (AT) cox (DOT) net> wrote

The only torque chart that I'm ever able to find is
Quote:
one for AN bolts/nuts. Since these are aluminum fittings, I don't dare
torque them to the same values.

Any assistance would be greatly appreciated.

Steve

This is such basic information, I don't know why anyone needs to ask stuff
like this.

Everyone knows, you tighten it until it strips, then back off 1/4 turn.

I'll go back to my room, now. <g> Sorry, I had to do it!
--
Jim in NC



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Blueskies
Guest





PostPosted: Mon Feb 14, 2005 12:25 am    Post subject: Re: Proper Torque for Fuel Fittings Reply with quote


"Steve Waltner" <swaltner-2005 (AT) cox (DOT) net> wrote

Quote:
I'm to the point of installing the fuel fittings on the fuel tanks on
my RV-8A project. I'm a little confused about what torque to set my
wrench at when installing the fitting.

The fitting that goes through the tank rib and 3/16" reinforcement
plate is an AN833-6D elbow with an AN924-6D nut on the outside. There
are also a pair of -4D fittings for the vent line which will soon be
mounted as well. The only torque chart that I'm ever able to find is
one for AN bolts/nuts. Since these are aluminum fittings, I don't dare
torque them to the same values.

Any assistance would be greatly appreciated.

Steve


Look up MS21344, should get you there...





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Blueskies
Guest





PostPosted: Mon Feb 14, 2005 12:47 am    Post subject: Re: Proper Torque for Fuel Fittings Reply with quote


"Blueskies" <nospamedblueskies (AT) ameritech (DOT) net> wrote

Quote:

"Steve Waltner" <swaltner-2005 (AT) cox (DOT) net> wrote

I'm to the point of installing the fuel fittings on the fuel tanks on
my RV-8A project. I'm a little confused about what torque to set my
wrench at when installing the fitting.

The fitting that goes through the tank rib and 3/16" reinforcement
plate is an AN833-6D elbow with an AN924-6D nut on the outside. There
are also a pair of -4D fittings for the vent line which will soon be
mounted as well. The only torque chart that I'm ever able to find is
one for AN bolts/nuts. Since these are aluminum fittings, I don't dare
torque them to the same values.

Any assistance would be greatly appreciated.

Steve


Look up MS21344, should get you there...




http://assist.daps.dla.mil/quicksearch/



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cvairwerks@tigerbyte.net
Guest





PostPosted: Mon Feb 14, 2005 3:12 am    Post subject: Re: Proper Torque for Fuel Fittings Reply with quote

Steve: I've got the torque charts at work and will pass on the correct
numbers when I get in. The torque values are different for the various
size fittings, with type of service and fitting material both having an
impact on the value.

Craig C.
[email]cvairwerks (AT) ev1 (DOT) net[/email]

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cvairwerks@tigerbyte.net
Guest





PostPosted: Mon Feb 14, 2005 3:25 am    Post subject: Re: Proper Torque for Fuel Fittings Reply with quote

Managed to locate the set that I had at home.

#6 Bulkhead nut is 75 inch-pounds +/- 5% for clean and dry threads.

#4D nuts get 75 inch-pounds +/- 5% also

Craig C.

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John
Guest





PostPosted: Mon Feb 14, 2005 7:45 am    Post subject: Re: Proper Torque for Fuel Fittings Reply with quote

Juan Jimenez wrote:

Quote:
I was taught to use no more than 10-12 ft/lb of torque for AN aluminum
fittings, but why not call Van's to get the answer from the source?

"Steve Waltner" <swaltner-2005 (AT) cox (DOT) net> wrote in message
news:130220051545560748%swaltner-2005 (AT) cox (DOT) net...
I'm to the point of installing the fuel fittings on the fuel tanks on
my RV-8A project. I'm a little confused about what torque to set my
wrench at when installing the fitting.

The fitting that goes through the tank rib and 3/16" reinforcement
plate is an AN833-6D elbow with an AN924-6D nut on the outside. There
are also a pair of -4D fittings for the vent line which will soon be
mounted as well. The only torque chart that I'm ever able to find is
one for AN bolts/nuts. Since these are aluminum fittings, I don't dare
torque them to the same values.

Any assistance would be greatly appreciated.

Steve


That's a lot of difference between 75 in pounds and 120-144 inch pounds
(10-12 ft/pounds). Definetly check with Van's but if you can't wait go with
the more conservative. (i'd wait!)
John


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Juan Jimenez
Guest





PostPosted: Tue Feb 15, 2005 12:42 pm    Post subject: Re: Proper Torque for Fuel Fittings Reply with quote


"John" <john.price (AT) none (DOT) com> wrote

Quote:
Juan Jimenez wrote:

I was taught to use no more than 10-12 ft/lb of torque for AN aluminum
fittings, but why not call Van's to get the answer from the source?

"Steve Waltner" <swaltner-2005 (AT) cox (DOT) net> wrote in message
news:130220051545560748%swaltner-2005 (AT) cox (DOT) net...
I'm to the point of installing the fuel fittings on the fuel tanks on
my RV-8A project. I'm a little confused about what torque to set my
wrench at when installing the fitting.

The fitting that goes through the tank rib and 3/16" reinforcement
plate is an AN833-6D elbow with an AN924-6D nut on the outside. There
are also a pair of -4D fittings for the vent line which will soon be
mounted as well. The only torque chart that I'm ever able to find is
one for AN bolts/nuts. Since these are aluminum fittings, I don't dare
torque them to the same values.

Any assistance would be greatly appreciated.

Steve


That's a lot of difference between 75 in pounds and 120-144 inch pounds
(10-12 ft/pounds). Definetly check with Van's but if you can't wait go
with
the more conservative. (i'd wait!)
John

Yes, it is, which is one reason I told him to call Van's and ask and get it
from the source.




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Blueskies
Guest





PostPosted: Wed Feb 16, 2005 12:05 am    Post subject: Re: Proper Torque for Fuel Fittings Reply with quote


"Blueskies" <nospamedblueskies (AT) ameritech (DOT) net> wrote

Quote:

"Blueskies" <nospamedblueskies (AT) ameritech (DOT) net> wrote


"Steve Waltner" <swaltner-2005 (AT) cox (DOT) net> wrote

I'm to the point of installing the fuel fittings on the fuel tanks on
my RV-8A project. I'm a little confused about what torque to set my
wrench at when installing the fitting.

The fitting that goes through the tank rib and 3/16" reinforcement
plate is an AN833-6D elbow with an AN924-6D nut on the outside. There
are also a pair of -4D fittings for the vent line which will soon be
mounted as well. The only torque chart that I'm ever able to find is
one for AN bolts/nuts. Since these are aluminum fittings, I don't dare
torque them to the same values.

Any assistance would be greatly appreciated.

Steve


Look up MS21344, should get you there...




http://assist.daps.dla.mil/quicksearch/


http://assist.daps.dla.mil/eAccess/loguser.cfm?ident_number=40046&dmxid=48839&passedUrl=http://assist.daps.dla.mil/docimages/0000/48/83/40046.PD9

See if that works...



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Steve Waltner
Guest





PostPosted: Sun Feb 20, 2005 12:46 am    Post subject: Re: Proper Torque for Fuel Fittings Reply with quote

In article <130220051545560748%swaltner-2005 (AT) cox (DOT) net>, Steve Waltner
<swaltner-2005 (AT) cox (DOT) net> wrote:
Quote:
I'm to the point of installing the fuel fittings on the fuel tanks on
my RV-8A project. I'm a little confused about what torque to set my
wrench at when installing the fitting.

The fitting that goes through the tank rib and 3/16" reinforcement
plate is an AN833-6D elbow with an AN924-6D nut on the outside. There
are also a pair of -4D fittings for the vent line which will soon be
mounted as well. The only torque chart that I'm ever able to find is
one for AN bolts/nuts. Since these are aluminum fittings, I don't dare
torque them to the same values.

Any assistance would be greatly appreciated.

Steve

Thanks for the responses. I ended up and called Van's yesterday. The
response was that there is no official torque value for the nut that
attaches the fitting to the rib. The sealant apparently provides a fair
amount of the support on holding the fitting in place instead of the
nut. This confirms what I was told by some others that I had asked this
same question which was, tighten it down to where the nut bottoms out
and go on to the next task. I sealed the various fitings onto the
inboard ribs last night.

Steve

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