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Pressure testing hoses

in 912 / 914 Technical Questions 7 years ago
I am looking for a way to bench test some hoses that have banjos on both ends. I have not been able to find a kit for plugging the banjos and pressurizing the hoses. I have a kit for AN flares, but can't find anything for banjos.

Thanks,

Ken

  • Re: Pressure testing hoses

    by » 7 years ago

    Put a bolt in one end with a clamp and a Banjo on the other to pressure the hose. Or just go to Ace Aviation (Ace Hardware) and buy a couple of fittings for each end. Doesn't have to be a Banjo bolt to just do a test.

    Why do you want to pressure test our hose. Just curiosity? Any hose you use should be far and above anything we'll throw at it.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: Pressure testing hoses

    by » 7 years ago

    Thanks Roger. What do you mean "our hoses?" My engine did not come with hoses to connect to the airframe. In addition, I have other hoses with banjos that I need to test. I am not interested in testing for burst. I just want to test for leaks before installing (like all hose companies instructions tell you to do).

    I don't understand your instructions for testing. Could you please elaborate. Again, I need to seal off both ends and then pump them up to whatever my compressor is putting out (about 70 psi) and then submerge them and look for leaks. I have a little kit for accomplishing this with flares, but I cannot find anything for testing hoses with banjo ends.
      
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  • Re: Pressure testing hoses

    by » 7 years ago

    Rodger,
    He doesn't want to test the "Hose", he wants to test the Hose Assembly with the Banjoes already installed.
    - - - - - - - - - - -
    Try this...

    Get four Pipe caps and two short pieces of pipe 2 to 4 times the diameter of the banjoes.
    Machine flat areas onto the end of two of the pipe caps and then drill and thread a hole in the center of the flat areas to fit the banjoes.
    Place one plain and one modified cap on each pipe section.
    If the hoses are long enough, both modified caps could be on the ends of the same pipe section.

    On one of these pipe assemblies drill and thread for a pressure gauge and a Schrader Valve for the air supply.
    Bolt one of each pipe assemblies to each end of your hose assemblies and then pressurize the whole assembly.
    If the pressure holds steady for a few minutes there will be no need for the water bath.
    Easy, Peasy!
    - - - - - - - - - - - -

    Having said all that, Why the concern? ???
    If you were manufacturing hundreds of hose assemblies for sale,
    and they were being assembled by unskilled labor, I could understand the concern.

    If you are just assembling a couple of hoses for your own use and you are diligent in your work,
    The odds of you assembling a leaky hose does not justify the cost of making a test jig for limited use.

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

      
    Report

  • Re: Pressure testing hoses

    by » 7 years ago

    Sorry I misunderstood. Forget what I said.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
    Report

  • Re: Pressure testing hoses

    by » 7 years ago

    Having said all that, Why the concern? ???


    I have always pressure tested hoses that I build.s Why? Because it seems prudent and the manufacturer says to. And most important, I would rather find the leak now than after installation. It's easy to test AN flares because Earl's makes a nice little kit for plugging and pressurizing. I am trying to find an equivalent for banjos. Didn't realize testing hoses with banjos was so unusual. Yes Bill, I can certainly cobble something together.
      
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