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Devilbiss Finish Line cant get the right pressure

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Joined: Sun May 02, 2010 9:20 am
Location: Ohio
PostPosted: Tue Jul 17, 2012 11:21 am
Hi All,

I have a new finishline FL3 paint gun(actually I bought it new a year ago, and am just now using it) and I cannot seem to get 30 psi when pulling the trigger. It drops all the way down to 5psi. I set the air guage all the way up to 120 psi with trigger closed, but when pull it, I still only got about 5-10 psi. What gives??

I can thread the same air guage on my cheap harbor freight gun and get 30 psi with trigger pulled but not the finishline. Is the Finishline a big air consumer?

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Location: New York
PostPosted: Tue Jul 17, 2012 12:59 pm
I'm not sure what your HF gun is (HVLP?) but the Finishline gun is HVLP and could certainly be sucking down more air than your other gun. What size compressor - what CFM does it claim to produce?

If your pressure @ gun handle drops to 5PSI immediately then something else might be going on.

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PostPosted: Tue Jul 17, 2012 1:09 pm
Screw gun directly onto the compressor outlet (no hose, etc.. probably put a regulator first though!) and see what happens.. If you're tank isn't dropping to 5psi with the gun, something is funky.This will bypass those variables.

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Location: Ohio
PostPosted: Tue Jul 17, 2012 1:39 pm
It is an HVLP and I gave wrong model, Its FLG3. dont know why PSI drops to 5psi at pull of trigger, my harbor freight guns can get 30-35 psi at pull of trigger with same compressor, line, and air regultor.

Here is the model Im talking about second from top .

http://www.tcpglobal.com/spraygundepot/ ... hline.aspx

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PostPosted: Wed Jul 18, 2012 10:59 am
Something is plugged
Never argue with an idiot, he will drag you down to his level and beat you with experience.

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PostPosted: Wed Jul 18, 2012 5:08 pm
ya got the packing nut tightened properly? have ya tied( dont know ifeen it'll help) running some sovlent though the gun?

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PostPosted: Thu Jul 19, 2012 2:46 pm
strip the gun down and clean ,check the air inlet ,that nothing has crept up there as its been sitting around for a year.
fail to prepare ,prepare to fail.

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PostPosted: Fri Jul 20, 2012 5:55 am
If the pressure drops to 5 PSI, doesn't that mean you have a serious leak?
If it's plugged, wouldn't that mean higher pressure on the gage?
I don't understand. :?

(It's not custom painting-it's custom sanding)

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