Topher88 Posted April 16, 2013 Report Share Posted April 16, 2013 Ok guys I'm stumped..... I just got my fuel system tightened up and as soon as I switched on the pump I'm getting 3 out of 4 leaks on my ss hard lines. I have tried tightening and loosening several times with no success. The male part is aluminum and the flared part is stainless steel. Any suggestions? Quote Link to comment
TENDRIL Posted April 16, 2013 Report Share Posted April 16, 2013 are they double flared? so that the lip cups back in ? Quote Link to comment
Topher88 Posted April 16, 2013 Author Report Share Posted April 16, 2013 No single flared with AN fittings Quote Link to comment
kelowg Posted April 16, 2013 Report Share Posted April 16, 2013 Yup thats what comes to mind Quote Link to comment
TENDRIL Posted April 16, 2013 Report Share Posted April 16, 2013 when i was redoing all the hard lines i made the mistake of single flaring and had leaks evreywhere, if you can find and borrow a double flair tool i would asap from the factor they come double flared Quote Link to comment
Topher88 Posted April 16, 2013 Author Report Share Posted April 16, 2013 I don't think AN fittings are suppose to be double flared Quote Link to comment
TENDRIL Posted April 16, 2013 Report Share Posted April 16, 2013 im talking about the hardlines see ^^ right is double, left single , center- duno what thats called? Quote Link to comment
RedBanner Posted April 16, 2013 Report Share Posted April 16, 2013 Like. Most fittings ive seen in the past 10 years are double flared. Quote Link to comment
deweyharding Posted April 16, 2013 Report Share Posted April 16, 2013 If the flare is not perfect it will leak no matter what you do because the aluminum flare is not strong enough to reform the flare against the fitting.Plus long term electrolisis will happen and cause corrosion. Quote Link to comment
Cahoon520 Posted April 16, 2013 Report Share Posted April 16, 2013 Are you going from a standard to an AN flare? A standard flare is 45 degrees and an AN flare is 37 degrees. Quote Link to comment
Topher88 Posted April 16, 2013 Author Report Share Posted April 16, 2013 They are at 37 according to the shop Quote Link to comment
MikeRL411 Posted April 16, 2013 Report Share Posted April 16, 2013 Try the conical "Voi Shan" seals before you tear out all your hair and scrap everything. If you made the flairs with a hand tool you inevitably leave radial chatter marks which are direct leak paths on a single flare joint. Single flares are only OK if made with powered flaring tools on AN fittings. Several spacecraft and satellite manufacturers learned this lesson the hard way. Quote Link to comment
Topher88 Posted April 17, 2013 Author Report Share Posted April 17, 2013 got it all fixed. ended up purchasing some nose protectors witch are simply soft aluminum caps that go ever the male AN fitting and when tighten the soft aluminum squishes and fills in all the imperfections. and just to clarify you only single flare AN fittings. at least thats what the hydraulic/ hose shop told me. Quote Link to comment
MikeRL411 Posted April 17, 2013 Report Share Posted April 17, 2013 got it all fixed. ended up purchasing some nose protectors AKA Voi Shan seals. Good move! Quote Link to comment
Topher88 Posted April 17, 2013 Author Report Share Posted April 17, 2013 yup guy called it nose protectors Quote Link to comment
Stoffregen Motorsports Posted April 23, 2013 Report Share Posted April 23, 2013 I learned a long time ago that you're not supposed to use a tubing cutter when working with hard lines as it work hardens the metal. When you go to flare the work hardened piece, it cracks. I learned this from an aircraft supply guru. Use a hacksaw or bandsaw to cut the tubing and clean it up on a belt sander or whatever and be sure there are no burrs. Even a small burr can cause a leak. Quote Link to comment
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