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Discussion in 'Troubleshooting!' started by Franc Kaiser, Aug 7, 2018.


  1. Franc Kaiser

    Franc Kaiser Mac-Valve Maestro! Very Likeable!

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    ... you only get "half" the spray output that you normally get?

    I am plagued with this problem for a while now. I cleaned the AB for hours and hours, and it couldn't be cleaner. I checked every other item forth and back. The air volume and pressure is ok. Nozzle super clean. Everything else super clean. But it just doesn't have the right suction once I put the nozzle cap (aka "tip") on.

    When testing the (super-clean) AB with water, it takes very long for the cup to empty, because the spray output is only at half or so the volume I am used to.... a rather thin, fine spray. This is great for details, but I feel like I am only half the man I am used to be. Working on any larger pieces becomes impossible.

    Did this happen to anybody else? How did you solve it?
  2. basepaint

    basepaint Air-Valve Autobot! Very Likeable!

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    Sounds like you might be sucking in air around the nozzle,or you still have paint stuck somewhere what brush are you using.
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  3. JackEb

    JackEb The Dragon Hunter Staff Member Admin

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    Ok, I'm just going to pop this link here
    http://www.airbrushforum.org/thread...er-to-show-what-was-still-in-the-brush.14250/
    I thought mine was clean too :)

    possibly your paint is a little thicker than the brush would like ? Its all about finding the brush's 'happy place'

    some of the other less obvious causes can be (and dont ask how I know this)

    Chair is on the airhose
    one of the two regulators or the MAC valve i have was turned all the way down


    and as Basepaint has just posted its sucking air from somewhere.
    - split hose
    bad seal on one of the threads, i find the interdental brushes really easy for cleaning the threads then a dose of chapstick / beeswax will help seal it
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  4. Franc Kaiser

    Franc Kaiser Mac-Valve Maestro! Very Likeable!

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    It's a Sparmax Sp20x (0.2mm). What I observed is that if I remove the tip and expose the nozzle and spray water through it, it all goes into one direction (upwards, at around 45% angle) - is this "normal"?
  5. basepaint

    basepaint Air-Valve Autobot! Very Likeable!

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    My old post:D
  6. Franc Kaiser

    Franc Kaiser Mac-Valve Maestro! Very Likeable!

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    Thanks JackEb! I like to assure you that it is really clean-clean (did all those steps outlined in that thread)...
  7. JackEb

    JackEb The Dragon Hunter Staff Member Admin

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    I know :) - - I remember EVERYTHING :(

    Its a good read, even if it doesnt resolve your problem it may helps another member with similar issues
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  8. basepaint

    basepaint Air-Valve Autobot! Very Likeable!

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    No, its not, it means you have paint in the nozzle still,or the nozzles split or bent,check and see if the end of the nozzles still round with a magnifying glass also take the nozzle off and let it soak in some restorer a few hours and see if you can push out any old paint with the needle
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  9. basepaint

    basepaint Air-Valve Autobot! Very Likeable!

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    Also check and see if the needles bent while you have it out.
  10. Franc Kaiser

    Franc Kaiser Mac-Valve Maestro! Very Likeable!

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    So what you're saying is that, when removing the tip and exposing the nozzle, the spray vector should be horizontal, right? If so, then you're probably right on and the nozzle is compromised (maybe too much cleaning!). I am not sure what's worse - a broken nozzle, or finding out that the nozzle was still dirty (and then, melting into my chair because of shame and embarrassment... JackEB will telepathically send a triumphant 'I-told-you-so' my way...).
  11. basepaint

    basepaint Air-Valve Autobot! Very Likeable!

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    By tip do you mean the crown cap?that covers the tip of the needle?
  12. Franc Kaiser

    Franc Kaiser Mac-Valve Maestro! Very Likeable!

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    No, the needle cap (that is, the tip, that covers the nozzle).
  13. basepaint

    basepaint Air-Valve Autobot! Very Likeable!

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    We all did it at one time or another in our journey to airbrush!
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  14. basepaint

    basepaint Air-Valve Autobot! Very Likeable!

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    Same thing,but if your spray is normal after you take it off then look at the needle cap and see if there's a build up of paint blocking the needle/nozzle
  15. JackEb

    JackEb The Dragon Hunter Staff Member Admin

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    Just to clarify the parts being discussed. . .
    upload_2018-8-7_13-34-19.png

    And i'll put this here, it may be helpful to someone.

    upload_2018-8-7_13-28-51.png

    And i would never say "I told you so" - if you read my little part of Basepaints thread above, you'll see that I was convinced my brush was clean.
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  16. Robbyrockett2

    Robbyrockett2 Air-Valve Autobot!

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    Going with the names on jackies chart, it sounds like youre saying it sprays with the nozzle cap removed....
    I believe you have a split or flared nozzle in this case. If not then it is leaning way off center .
    It really shouldnt spray anything with the nozzle cap removed. Only if some portion of the nozzle disturbs the air stream will you get any paint at all with the nozzle cap removed.


    Ill just throw out one other thing here. It is unlikely in this case since it wont cause your spray to go off in one direction but you may run into it in the future. Since your sparmax uses an o-ring at the nozzle base the o-ring can simply get worn out and be too thin so the your nozzle starts to recede from the position it should be in where it protrudes just a tiny bit from the nozzle cap. The amount of paint that comes out will diminish as it sinks into the nozzle cap hole over time and eventually get to where it just makes bubbles in the cup. Leaning way off center though could be an o-ring issue.
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  17. SiRoxx

    SiRoxx Party Boy UK Style Very Likeable!

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    I was going to suggest backflushing and ensuring there are no bubbles in the cup until the needle is pulled back. I’ve damaged a nozzle by cleaning to enthusiastically :D, so although it was clean, it was also busted lol.
  18. Franc Kaiser

    Franc Kaiser Mac-Valve Maestro! Very Likeable!

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    Really helpful chart, thanks a lot for sharing
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  19. JackEb

    JackEb The Dragon Hunter Staff Member Admin

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    It helps if we all speak the same terminology and the 2nd picture can explain things quicker than 1000 words
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  20. Franc Kaiser

    Franc Kaiser Mac-Valve Maestro! Very Likeable!

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    Thanks to all of you who so generously chipped in your wisdom and experience! I will let you know how things progress once I got to work on the issue.
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