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  1. #1
    Gold Member
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    2011 Kioti DK45 HST

    Default Leaking couplings

    Ok, I'm going to have to show my inexperience and ask for help with my couplings. I asked for the flat face couplings to be removed since I didn't have a skid steer. The hoses came in as 1/4 inch and have 1/2 inch threads on them. I have 3/8 inch couplings so I went and bought the middle adapter you see in the picture. The problem is that it pours hydraulic fluid when I connected them and it is not coming around the treads on either coupling. It appears to be coming around the end of the coupling away from the threads (behind the 3rd nut on the coupling from the left in the picture at the top. I don't know how else to explain it. This pece will turn easily even with the threads tight. It lets the entire coupling turn. I don't think it has any kind of O ring in it. Did the guy give me the wrong coupling? I told them it was going on a grapple.

    Thanks
    Attached Thumbnails Attached Thumbnails -img_1042-jpg  

  2. #2
    Veteran Member kthompson's Avatar
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    Kubota M 6800; Kubota B 2710; Gator; Bushhog ZTR; Volvo Mini Excavator EC45

    Default Re: Leaking couplings

    My quick thoughts, you don't have matching threads but you probably would have realize that. But if it is leaking from where I understand you need to remove the pipe tape as it is a machined fitting that is doing the sealing inside the swivel nut and not the threads. If a piece of the tape were to get between those two surfaces think it would leak. Also if you wrap the tape backwards it often peels off but will normally leak.
    Jeremiah 2:11a "Has a nation changed its gods, Which are not gods?

  3. #3
    Silver Member
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    Middle of west TN
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    JD: LX172, X740, 3520

    Default Re: Leaking couplings

    Are those supposed to be new couplings? The male coupling appears to have a hole in its side - on the bottom in your photo.

  4. #4
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    2011 Kioti DK45 HST

    Default Re: Leaking couplings

    It looks worse than it is. It has some tarnish on it but it doesn't have a hole and its not leaking from the threads on either coupling. Its behind the nut between the couipling and the hose. Its the piece I had to add to make them mate properly. That piece has to be the problem since they are both leaking in the same place. No leaking...pouring. Do some have O rings and other not? It acts as if it doesn't have an O ring.
    Thanks

  5. #5
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    Default Re: Leaking couplings

    In addition to being a adapter the fitting you purchased is a swivel. The full rotation is by design and will not go away with further wrenching. The tape may have bunched up allowing the leak. The China stamped on the fitting may mean that it could be in the manufacturing. Do they both leak? Are the fittings designed for pipe threads? If possible take the hose with the fittings back and make sure everything matches up together. We are near a Parker fluid store and there is few mistakes they have not seen or can not fix when given the parts to work with. Remember that the fluid when under pressure can be a danger.

  6. #6
    Elite Member
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    Northern, IL
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    Branson 2400H

    Default Re: Leaking couplings

    Take the swivel connector off the end of the hose and then look at the two mating pieces. IF this is NPT (pipe thread) the swivel should have a 30 degree inverted flare in it. I.e. would be like looking at the top of an Indian tee pee.

    The hose end MUST have the chamfer in it to match. If it doesn't it will leak.

    If you still are unsure post some clear pictures of these two components since it sounds like you may have the wrong fittings.

    Roy
    Artificial Intelligence will never overcome natural stupidity.

    Branson 2400H MMM & FEL

    JD 112

    BX1850 gone but not forgotten

  7. #7
    Gold Member mpham's Avatar
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    Massachusetts
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    Kioti ck20

    Default Re: Leaking couplings

    I concur to what oldanslo says. It looks like the hose fitting end is not the right one to tighten up against the swivel fitting. They should have a ball and socket looking end on both. If you have it tight and it is still moving then it is not the correct ones. If it is tight because of the tape it wont seat down far enough.
    Pictures of the hose end would be helpfull.
    Phil. from Mass.
    2006 Kioti ck20 with 425 hours
    New to me 2011 K120 loader

  8. #8
    Gold Member
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    2011 Kioti DK45 HST

    Default Re: Leaking couplings

    Quote Originally Posted by oldnslo View Post
    Take the swivel connector off the end of the hose and then look at the two mating pieces. IF this is NPT (pipe thread) the swivel should have a 30 degree inverted flare in it. I.e. would be like looking at the top of an Indian tee pee.

    The hose end MUST have the chamfer in it to match. If it doesn't it will leak.

    If you still are unsure post some clear pictures of these two components since it sounds like you may have the wrong fittings.

    Roy
    Ok, I'll take better pictures tomorrow.
    Thanks

  9. #9
    Gold Member
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    2011 Kioti DK45 HST

    Default Re: Leaking couplings

    Quote Originally Posted by mpham View Post
    I concur to what oldanslo says. It looks like the hose fitting end is not the right one to tighten up against the swivel fitting. They should have a ball and socket looking end on both. If you have it tight and it is still moving then it is not the correct ones. If it is tight because of the tape it wont seat down far enough.
    Pictures of the hose end would be helpfull.
    I have the threaded part tight. It isn't leaking there on either coupling. The other nut on the conector coupling just spins and will not tighten so I'm assuming I have the wrong ones. It is leaking behind the nut that spins on both couplings so it has to be they are wrong. Don't think its a tape issue. More pics tomorrow after I take it back apart.
    Thanks to everyone.

  10. #10
    Gold Member Glen Watkins's Avatar
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    Finger Lakes Region of New Yorkistan FUAC
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    2007 John Deere 4320 Cab Tractor

    Default Re: Leaking couplings

    Quote Originally Posted by mpham View Post
    I concur to what oldanslo says. It looks like the hose fitting end is not the right one to tighten up against the swivel fitting. They should have a ball and socket looking end on both. If you have it tight and it is still moving then it is not the correct ones. If it is tight because of the tape it wont seat down far enough.
    Pictures of the hose end would be helpfull.
    Like they said!
    You have the wrong type of fitting on the hose end.
    JD 4320 Cab,6' KK Brush Hog{Old Heavy Version}, 6' Woods Finish Mower, 400x FEL 73" HD Bucket, 3rd Function Kit Installed, 6' AF11 Snow Blade, 60" Root Rake Grapple, Wallenstein FX-90 Skidding Winch...

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