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  #1  
Old 02-19-2016, 03:25 PM
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magiccarpet magiccarpet is offline
 
Join Date: Feb 2013
Location: Switzerland, Europe
Posts: 202
Default Brake line fitting. Potentional leakage ?

When I installed the fittings for the reservoir brake lines I encountered that the brass insert did not fully bottoms against the end of the plastic tube.
No matter how hard I pushed (right after it has rested long enough in boiling water) it sticks out by .053".
I am unsure if that is ok, or if I will face a leaking problem later on because of that.

I may add, that I didn't drill the tube with a #29 bit as the instruction says in chapter #5. The instruction where the brake lines are made do not call for any enlarging the tube diameter.



Thank you very much for your opinion on that.
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  #2  
Old 02-19-2016, 05:08 PM
Larkrv10 Larkrv10 is offline
 
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Location: Southampton, Ont
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Default brake line fiting

Chris, why not try a little hot water to soften up the tubing? Should allow the insert to seat better.
Rick
#40956
Southampton, Ont
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  #3  
Old 02-19-2016, 05:53 PM
daveyator daveyator is offline
 
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Location: adelaide, south australia
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Default

It's been a while, but I recall having difficulty at first. I think I pushed the nut and olive(that's what the little piece that sits inside the nut is called in Australia) well out of the way. Put the sleeve onto the mandrel of a blind rivet held in a vice. Warm the tube with a heat gun(carefully) you will feel it soften a little. Now quickly push the line onto the sleeve. Then open up the vice, and use the jaws to push the nut and olive into position. It worked for me. Hope my description makes sense to you.
My local hydraulic line expert pointed out that the inside sleeve is really not even necessary. The seal is achieved by the nut and olive. Back in the day working on trucks, we used the same fittings on air systems, and never used the internal sleeve.
Hope this helps
DaveH
120485

Last edited by daveyator : 02-19-2016 at 05:57 PM. Reason: Typo
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  #4  
Old 02-19-2016, 08:09 PM
Skint Skint is offline
 
Join Date: Feb 2009
Location: Pleasanton, CA
Posts: 111
Default olives

Back in 1979 having recently arrived in the US, I went into a hydraulics parts store to buy some olives for some copper tubing. I ended up trying to draw what an olive looked like. Learned my first American word....sleeve. Martini may have come up too. In 2016 I consider myself bilingual.

What was that about separated by a common language?
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  #5  
Old 02-20-2016, 05:51 AM
daveyator daveyator is offline
 
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  #6  
Old 02-20-2016, 06:02 AM
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bret bret is offline
 
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Location: Gardnerville Nv.
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I just re did mine, like above, install nut and feral, slide down tube, install insert as far as you can, heat with a gun or other heat source, push insert in by pushing hard against a wood work bench, be carful not to bend or kink the tube, then before it cools, grab the nut and pull the nut and feral down to about 1/16-1/8" ;-)
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Old 02-20-2016, 07:02 AM
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Walt Walt is offline
 
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See page 11 of the RVator:
http://www.vansaircraft.com/public/R...009-RVator.pdf
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  #8  
Old 02-20-2016, 07:30 AM
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GLPalinkas GLPalinkas is offline
 
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Quote:
Originally Posted by Walt View Post
Man, I really miss the old RVator's. Thanks for the link Walt. Even the pdf version would be a welcome return..... just saying Van's. Something I would pay for.
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Last edited by GLPalinkas : 02-20-2016 at 07:30 AM. Reason: sp
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  #9  
Old 02-20-2016, 12:49 PM
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magiccarpet magiccarpet is offline
 
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Location: Switzerland, Europe
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Default Tribute to VAF

Thank you very much everybody for all your good advice and for enlighten me in how sealant is achieved with these fittings.
I removed the lines, heated up the ends very gently and slightly tapped the brass insert. ...et voil?
Now I have the peace of mind regarding the brake lines and can go on...

... trying to remove tank sealant from my hands after having installed the upper FW
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  #10  
Old 02-20-2016, 09:32 PM
BillL BillL is offline
 
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Location: Central IL
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Quote:
Originally Posted by magiccarpet View Post
... trying to remove tank sealant from my hands after having installed the upper FW
baby oil - skin is porous, rub it in and it will undermine the sealant and separation shall occur.
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