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What makes an airbrush spray before pulling back on the trigger is that the needle is not sealing off the nozzle. This can be caused by crud in the nozzle or damage to it or the needle. But, I wonder if maybe in this case the needle was not reset when the head was changed. Since the new nozzle is larger, the finer needle wouldn't seal unless you re-adjust it and move it forward.
If that's not the cause, examine the new nozzle closely with a magnifier and see if the opening is clear and perfectly round.
Also, hopefully you are aware that there are 3 parts that must be changed; the head, the needle, and the spray regulator.
Don
https://sites.google.com/site/donsairbrushtips/home
A collection of airbrush tips and reviews
Also an Amazon E-book and paperback of tips.
Resident Eric damn, i made a newbie mistake :)
damn, i made a newbie mistake :)
Never happens to me..................today, anyway
Steve
Building the perfect model---just not quite yet
Eric - The needle and head components are indeed required to be "matched as a set." The exploded parts diagram in the manual sorts it out, if you're missing that you can download it from the Badger site.
The larger nozzle, combined with a smaller needle size, would I suspect just allow paint to flow when the trigger is depressed. There would be no needle/nozzle seal to prevent paint flow. Let's wait for Don Wheeler to stop by, he can explain it thoroughly and clearly. Good luck with it, I think the larger needle will have you back in biz, should be no harm done to the airbrush.
Patrick
It does need a large needle, but I don't get why it stops painting when you pull the needle back. I only have the medium and XF heads, but I imagine if the needle is to small for the head, the paint would flow out to much.
I am a Norfolk man and i glory in being so
On the bench: Airfix 1/72nd Harrier GR.3/Fujimi 1/72nd Ju 87D-3
Do I need to replace to a large needle too?
I have a badger 100 LG airbrush and purchased a badger (50-0163) large head assembly. When I switched to the new head, the airbrush became like a single action mode and sprays paint when I press the trigger down but not backward. I've tried this with paint, water, thinner and they all spray out as soon as I press the trigger down. I thought I didn't put the parts back together correctly since last cleaning. So I took it apart and back together, same thing happened. Switched back to the old head (regular size nozzle), I get double action again. I examined both head assemblies, both look identical with the exception of slightly larger nozzle and tip on the new one of course. Anyone has an idea of what's happening here?
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