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Thread: hydraulic fittings "O ring face"

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    Luke Skywalker
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    hydraulic fittings "O ring face"

    I am trying to fit a quick disconnect to the hydraulic line of my new scissor lift so that the hose to to the pump does not lie on the floor when the lift is not in use.


    The system uses face o ring type fittings. The image below shows the plug that was used to block off the hose at the pump end for shipping. The other end came attached to the cylinders on the lift via a junction block machined for this same o ring fitting.


    When I took the plug to my local hydraulic “expert” he said it was metric and he didn't deal with metric. I was also told that he couldn't simply cut the hose and put the disconnect between the pieces since his fitting would not match metric hose.


    I really don't have enough knowledge or information to call around or to order something on line. Here's what I do know.


    While the fitting is most likely metric, 14 x 150, it seems very close to 9/16 x18 and the literature also lists “ORS thread”. I'll try and dig up a better thread gauge.



    lift fitting 2.jpg



    Here is the closes thing I can find. https://www.hydraulicsdirect.com/ORFS-Plug-p/fs2408.htm
    parker fitting.jpg

    The difference is that on my fitting the o ring is captured by the female part and merely rests on the nub on the end.
    Note also that there is no ORS size 9/16 listed.
    Seems it shouldn't be all this complicated.
    Any ideas will be appreciated.

    Tom
    1960 TR3A TS73117 (under endless restoration, owned since 1964)
    1959 TR3A TS58023 (in case I never finish the one above)
    1969 Triumph Herald 13/60 (a whim)
    1970 Lotus Elan Plus 2 /0023/N
    1992 BMW325IC (fun to drive)

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    Great Pumpkin TR3driver's Avatar
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    Re: hydraulic fittings "O ring face"

    Inside the port that plug fits into, is there an area that fits snugly on the outside diameter of the O-ring? O-rings have to be constrained in order to carry any pressure. I'm wondering if perhaps the plug is just a cheap blanking plug for shipping (not capable of holding pressure). If not, then I don't think an ORS is going to fit.

    But I did find a listing for 9/16-18 in a similar (if not identical) sealing system. They call it FOR-seal or "flat face O-ring seal".
    http://www.hfifluidpowerproducts.com...ion-guide.html
    Randall
    56 TR3 TS13571L once and future daily driver
    71 Stag LE1473L waiting engine rebuild
    71-72-73 Stag LE2013LBW waiting OD gearbox rebuild

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    Luke Skywalker
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    Re: hydraulic fittings "O ring face"

    Quote Originally Posted by TR3driver View Post
    Inside the port that plug fits into, is there an area that fits snugly on the outside diameter of the O-ring? O-rings have to be constrained in order to carry any pressure. I'm wondering if perhaps the plug is just a cheap blanking plug for shipping (not capable of holding pressure). If not, then I don't think an ORS is going to fit.

    But I did find a listing for 9/16-18 in a similar (if not identical) sealing system. They call it FOR-seal or "flat face O-ring seal".
    http://www.hfifluidpowerproducts.com...ion-guide.html
    Yes, on the inside there is a recess that captures the o ring. When I installed the hose fitting, I put the o ring inside first. Thanks for the link, I'm beginning to feel a bit optimistic.
    Tom
    1960 TR3A TS73117 (under endless restoration, owned since 1964)
    1959 TR3A TS58023 (in case I never finish the one above)
    1969 Triumph Herald 13/60 (a whim)
    1970 Lotus Elan Plus 2 /0023/N
    1992 BMW325IC (fun to drive)

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