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Old 03-27-2012, 11:52 AM   #1
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Leaking hydraulic line

Just noticed a leak in a hydraulic for my galley slide. The bottom of this couplin was wet along with everything below it. The coupling seems to be tight. This in on a 2 yr old 357qs. Are there any washers or o rings or something else I can check????? Thanks
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Old 03-27-2012, 12:27 PM   #2
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I had one leaking at the threads on a leveler. I was able to relieve the pressure on the line by raising the levelers and removed the hose and wiped the fitting off. I then wrapped the threads with teflon tape, reconnected it and it's never dripped again. I only lost about an ounce or two of hydraulic fluid.
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Old 03-27-2012, 12:36 PM   #3
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I had one leaking at the threads on a leveler. I was able to relieve the pressure on the line by raising the levelers and removed the hose and wiped the fitting off. I then wrapped the threads with teflon tape, reconnected it and it's never dripped again. I only lost about an ounce or two of hydraulic fluid.
Sorry, the threads on hydraulic hose fittings are not intended for any sort of teflon tape or thread sealer. If you cannot get it tight, then you must replace it. They are typically 37-1/2 degree flares and are designed for a good mechanical fit. Making them leak proof. If it leaks, take it apart and inspect it. Even the slightest nick or ding during assembly will cause problems. It is not uncommon for the crimp on the hose end to leak due to improper assembly. Wipe everything off and inspect carefully. If the hose end is bad, get a new hose made up at any hydraulic shop, install it and move on. If the fitting is bad, get a new fitting at any hydraulic shop, install it and move on.
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Old 03-27-2012, 12:53 PM   #4
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Thanks a bunch for the info. How do I relieve the pressure in the system do I can disassemble it????
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Old 03-27-2012, 05:04 PM   #5
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Thanks a bunch for the info. How do I relieve the pressure in the system do I can disassemble it????
I had all of the levelers up and slides in as well. I took a wrench and just loosen the fitting until it was dripping into the pan below. It didn't drip real long. There was no spray from pressure in the lines.
Can you access the fitting with the slide closed? or at least 75% closed?
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Old 03-27-2012, 05:07 PM   #6
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I'm sure I could access it to disassemble just don't know how closely I will be able to
See it to inspect it
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Old 03-27-2012, 05:40 PM   #7
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Sorry, the threads on hydraulic hose fittings are not intended for any sort of teflon tape or thread sealer. If you cannot get it tight, then you must replace it. They are typically 37-1/2 degree flares and are designed for a good mechanical fit. Making them leak proof. If it leaks, take it apart and inspect it. Even the slightest nick or ding during assembly will cause problems. It is not uncommon for the crimp on the hose end to leak due to improper assembly. Wipe everything off and inspect carefully. If the hose end is bad, get a new hose made up at any hydraulic shop, install it and move on. If the fitting is bad, get a new fitting at any hydraulic shop, install it and move on.
I respecfully disagree with the statement in red .
If the hose fittings are "npt"(national pipe thread) fittings may require tape as it is a "friction fit " and requires tape or paste to correctly tighten .
I agree with your statement in blue "mostly" jic is a straight 37 degree flare and your right does not need thread tape .
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Old 03-27-2012, 05:45 PM   #8
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Originally Posted by mr.ken View Post
Just noticed a leak in a hydraulic for my galley slide. The bottom of this couplin was wet along with everything below it. The coupling seems to be tight. This in on a 2 yr old 357qs. Are there any washers or o rings or something else I can check????? Thanks
it appears that it is jic flare . and the most common problem with this fitting is the female side or the fitting on the hose side had an o-ring crimped behind the nut to allow the nut to turn to tighten without leakage behind fitting.
if the o-ring dry s up it will leak . only proper way to fix it is to take entire hose off and have a new end crimped on or have a new hose made all together.
I personally DO NOT like non wire reinforced hose which you have . I would replace it with two wire hydraulic hose .
I have my own hyd. hose crimper,hose and ends if you need anything let me know.
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Old 03-27-2012, 05:52 PM   #9
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I respecfully disagree with the statement in red .
If the hose fittings are "npt"(national pipe thread) fittings may require tape as it is a "friction fit " and requires tape or paste to correctly tighten .
I agree with your statement in blue "mostly" jic is a straight 37 degree flare and your right does not need thread tape .
I have never seen a NPT thread fitting to hose. I was talking about the JIC fitting end as I assume was the poster who suggested using teflon tape. Now, I do agree that it is OK to use teflon tape IF a person knows how to properly use it on NPT threads as a lubricant and not in an attempt to seal something that already has a problem with it.
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Old 03-27-2012, 06:00 PM   #10
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