Posted: 11/13/2014 6:10:55 PM EDT
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Got a system using 6JIC. One particular adapter is an aluminum fitting sealed with an o-ring, so an ORB fitting.
The rest are 6an female JIC swivels. Went out today and was noticing some fluid leaking, just a few drips. I went ahead and snugged it up a bit. Still leaking. Why would a hydraulic fitting that is almost brand new leak, after I did the hand tight +2 flats as specified by fitting manufacturer? And still leak after I snugged it up a little more. Given that it was fairly cold today about 12*F. I am thinking that the aluminum and steel fittings and expanding at different rates. I am also thinking that I should use some type of Loctite on the fittings. Given the amount of vibration/hydraulic pulsation I am fairly certain it is a culprit. What is the best Loctite to use for this application?: ETA: Yes I know JIC is not supposed to use/require threadlocker. However, I do not want this coming apart and leaking. |
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Look on the seal surface ? you either don't have it torqued to spec or there is a ding on the mating surface of the JIC fitting. Sometimes you can scotchbrite the surface and get it to seal if the ding isn't to deep.
I work with hydraulics that operate at very high psi ranges and never had to thread lock or tape the fittings. Something else is wrong |
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Quoted:
Maybe I'm just not familiar with them, but I have never seen a JIC with an oring. Do you have a pic? No the JIC is standard 37* flare swivel female. The O-ring fitting is a ORB fitting to 6JIC male (Aluminum Fitting I discussed earlier). I am concerned that this fitting is expanding/contracting at a different rate than the 6JIC steel that mates to it. The fitting is metric thread on the ORB port, so all I could find was aluminum. I am looking for a steel variant right now. |
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Quoted:
Look on the seal surface ? you either don't have it torqued to spec or there is a ding on the mating surface of the JIC fitting. Sometimes you can scotchbrite the surface and get it to seal if the ding isn't to deep. I work with hydraulics that operate at very high psi ranges and never had to thread lock or tape the fittings. Something else is wrong Am I just supposed to torque the dickens out of it? All of these fittings were brand new when assembled a few days ago. Followed initial torque specs, (flat method no open end torque wrench) and then just today I noticed it was dripping. So I started inching up the torque on each fitting. Henceforth I am thinking that hydraulic pulsation, metal expansion contract and vibration are causing this. |