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  1. #1

    i am rebuilding the pump myself rxtx2010 should i test pressure or not?

    i am rebuilding the pump myself rxtx2010
    new kit with bearing and seals
    should i test pressure or not?.
    thank you guys


  2. #2
    mibunkerking's Avatar
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    Always a good idea to pressure test to check that the seals and doing their job correctly. If you don't, then pull the cone and check for water intrusion after the first hour of run time. I have rebuilt dozens of pumps and only had one with an issue afterwards. Turned out to be a nicked oring.

  3. #3
    How can i make a pressure test please?

  4. #4
    mibunkerking's Avatar
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    Couple different ways to do it. I took a spare cone I had laying around and drilled a small hole in the side. Like 1/8". Then I taped it for threads and put a barbed fitting into and connected it to a air gauge and air gun. If you don't have a spare cone you can do something similar with the one you got and plug the hole with a set screw.

    i put 10-15psi in it and spray soapy water on the seals to check for leaks. No bubbles = no leaks

  5. #5
    Any picture please

  6. #6
    Homedepot.com picture or links or item number can help me a lot thank you

  7. #7
    This is how I run a jetski shop in the desert nmpeter's Avatar
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    first of all 15 PSI is a bit high if you'd ask me. 6psi is the spec I recall. I could well be wrong on that. check the service manual.

    secondly you can buy a test cone with a fitting on it for about 20 bucks

    assure that you get the right test cone. the bolt pattern changed along the way

    http://osdparts.com/index.php?main_p...7fshp7d1eapfj2

    that's an example, NOT an endorsement

    They do mention the issue with the pump cone bolt pattern

    you'll need a carb pop off pump also ( $50). Those are a bit pricey, but if you junk box is pretty full, you can likely rig up something that can supply and measure the pressure in the pump.

    pump the pressure up to 6psi and wait ten minutes. if the pressure is still 5-6 you're good to go.

    if you search for "leak down test" you will come across some example of the homemade setups. You can't get enough volume into an engine with a pop off pump to test it.

    You only want to do this once. do it right

  8. #8
    Please

  9. #9
    mibunkerking's Avatar
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    Pete, you are probably right on the psi number. I usually shoot for 10psi and have had them hold out to 15 psi before so that's what I'm going by.

    Don't know where my rig is at the moment but it's very easy to build. You will need a air gauge that reads the lower psi numbers (like a 0-30psi), a barbed tee fitting, a barbed/threaded fitting, a stainless steel set screw, and a couple pieces of hose.

    Drill/tap a hole for the barbed/threaded fitting in the side of the cone and install the fitting. Connect that to one side of the tee with hose, connect gauge and air supply to the other ends of the tee. Pressure test away.

    if you use a air compressor, I recommend draining the only building 10-15psi in the tank to prevent blowing out the seals by accident. And if you don't have some sort of valve between the pump and air tank ( like air gun) then it will tank much longer for it leak down cause of the increased air volume.

    when done, wrap set screw with teflon tape and install in hole in the cone.

  10. #10
    Thank you guys
    Test done and passed. 14 lb 14 hours hold
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