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  1. #1
    Join Date
    Jul 2012
    Location
    Jersey
    Posts
    782

    Default Sealing BSP hydraulic fittings

    The fuel feed from my tank to Separ filter includes a length of hydraulic hose with 3/8" BSP cone fittings at each end. I have been suffering a slight air leak on the fuel line and have now tracked it down to one of these joints. I've tightened it up as far as I can but it still leaks slightly. Is there any kind of sealnat or lubricant I can use that will help make an air tight/fuel tight joint?

  2. #2
    Join Date
    May 2009
    Location
    Wirral
    Posts
    678

    Default Re: Sealing BSP hydraulic fittings

    Hylomar blue which comes in a small tube has always worked for me.
    Leisure Owners Association

  3. #3
    Join Date
    Nov 2009
    Location
    Home UK Midlands / Boat Croatia
    Posts
    19,762

    Default Re: Sealing BSP hydraulic fittings

    I would not use any sealant but make sure that the mating surfaces are scrupulously clean and not marked, apply a little grease, and the nip them up again. If the surfaces are not marked they should easily seal as this is a very undemanding application.

    Richard

  4. #4
    Join Date
    Nov 2001
    Location
    Me: Johannesburg South Africa Yacht: Richards Bay East Coast Africa
    Posts
    7,007

    Default Re: Sealing BSP hydraulic fittings

    Do ensure that the hose cone fittings are compatible with the fittings they connect with.
    Life is too short not to have a sea view
    Distantshaws tinyurl.com/yclt6l68

  5. #5
    Join Date
    Nov 2004
    Location
    Medway, UK, boat in SYH
    Posts
    2,365

    Default Re: Sealing BSP hydraulic fittings

    Source some Loctite 542 from you preferred supplier

  6. #6
    Join Date
    Mar 2004
    Posts
    6,030

    Default Re: Sealing BSP hydraulic fittings

    Quote Originally Posted by RivalRedwing View Post
    Source some Loctite 542 from you preferred supplier
    That worked for me too on a slightly sloppy joint.

  7. #7
    Join Date
    Jul 2012
    Location
    Jersey
    Posts
    782

    Default Re: Sealing BSP hydraulic fittings

    Thanks for the comments. Iíve taken the fuel line off to have a proper look at it and try and see why itís not sealing. For the sake of a few quid I might get my local hydraulic shop to put a new end on the pipe anyway. When I try to tighten the nut the whole pipe starts to twist so something is binding slightly and probably reducing the tightening force I can apply.

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