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Reusing 3/8" Flares...

 
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Matt Dralle
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Joined: 08 Nov 2005
Posts: 25203
Location: Livermore CA USA
PostPosted: Sun Jul 10, 2011 7:04 pm    Post subject: Reusing 3/8" Flares... Reply with quote
Dear Listers,

I pulled out all of the fuel selector valve and fuel pump goodies from the old fuselage today. I disassembled all of the various flare ends and cleaned up all the Fuel Lube with lacquer thinner making sure not to get any in the pump or valve or transducers. All but two of the fuel lines seem to be reusable and don't show any signs of damage from the Mishap. I really don't want to have to recut, rebend, and reflare all of these if I don't have to.

What's the common knowledge on reusing the flares on the fuel and brake lines?

Am I just asking for a bunch of leaks if I put these back into service now that I've unscrewed them?

Thanks!

Matt

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Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
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Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...

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alan(at)airweigh.com.au
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PostPosted: Sun Jul 10, 2011 7:19 pm    Post subject: Reusing 3/8" Flares... Reply with quote
Reuse the good ones Matt.

RV8 VH-AKS 200 hrs.

On 11/07/2011, at 1:02 PM, Matt Dralle wrote:

Quote:

Dear Listers,

I pulled out all of the fuel selector valve and fuel pump goodies from the old fuselage today. I disassembled all of the various flare ends and cleaned up all the Fuel Lube with lacquer thinner making sure not to get any in the pump or valve or transducers. All but two of the fuel lines seem to be reusable and don't show any signs of damage from the Mishap. I really don't want to have to recut, rebend, and reflare all of these if I don't have to.

What's the common knowledge on reusing the flares on the fuel and brake lines?

Am I just asking for a bunch of leaks if I put these back into service now that I've unscrewed them?

Thanks!

Matt

-
Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
<2008.10.04 - RV-8 - Fuel System Plumbing (7).jpg><2008.10.04 - RV-8 - Fuel System Plumbing (9).jpg>


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estone(at)mchsi.com
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PostPosted: Mon Jul 11, 2011 2:49 am    Post subject: Reusing 3/8" Flares... Reply with quote
Matt,
My rule is to carefully inspect each line, pulling back each b nut to
inspect the flares. If you use a good 10x magnifying glass, inspect it that
way. But you can can use lines again without reflaring! If find a crack
discard, make a new line..

Elton Stone
Director of Aviation
College of the Albemarle
RV-8A

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algrajek



Joined: 10 Jan 2006
Posts: 41
Location: Lexington, Ky
PostPosted: Mon Jul 11, 2011 3:35 am    Post subject: Reusing 3/8" Flares... Reply with quote
Matt:
Just check for cracks and any debris. You can re use these with no problem at all. FYI, you really DON'T want to use fuel lube on these AN fittings. That stuff is mainly used on Pipe thread fittings where the fluid will leak through the threads. On an AN fitting, the flare fitting takes care of that.
Al

Quote:
Date: Sun, 10 Jul 2011 20:02:17 -0700
To: rv-list(at)matronics.com; rv8-list(at)matronics.com; rv7-list(at)matronics.com
From: dralle(at)matronics.com
Subject: RV8-List: Reusing 3/8" Flares...


Dear Listers,

I pulled out all of the fuel selector valve and fuel pump goodies from the old fuselage today. I disassembled all of the various flare ends and cleaned up all the Fuel Lube with lacquer thinner making sure not to get any in the pump or valve or transducers. All but two of the fuel lines seem to be reusable and don't show any signs of damage from the Mishap. I really don't want to have to recut, rebend, and reflare all of these if I don't have to.

What's the common knowledge on reusing the flares on the fuel and brake lines?

Am I just asking for a bunch of leaks if I put these back into service now that I've unscrewed them?

Thanks!

Matt

-
Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...


[quote][b]

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PostPosted: Fri Jul 15, 2011 5:01 am    Post subject: Reusing 3/8" Flares... Reply with quote
Matt AS a A&P and instructor, those lines that look good are more than likely good. The whole trick is not to overtight the b nuts. U should be fine. Everything I see is looking great!
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