Question about GRACO INC 3900 Handheld Paint Sprayer HV3900USG
Posted by Anonymous on
Seeing how you have really stated what the problem is (spitting, clogged, won't shut off, fan pattern wont adjust Etc) and there could be several different things wrong- lets go over some basic spraying A B C'S- always strain the paint through a strainer bag or cone this will remove any debri that might clog the tip, *THINNING when you spray or atomize paint it should always be thinned it will actually cover much better if you thin it with the appropriate solvent water for latex thinner for oil base you want to stay in the 15% range alittle bit more on hot days. The shape of the spray that comes out of the tip is called "fan pattern" or "tip fan" "fan size" you can adjust the fan pattern from 9:00 - 3::00 or sideways to straight up and down or to a small circle this is done by moving the "tip housing retainer" keep a piece of cardboard to practice and see. IMPORTANT:When you have finished spraying you need to clean the entire gun by running the right solvent through the gun untill nothing but clean solvent is coming out dissemble the gun remove and clean needle and needle housing this is not very complicated and is paramount to maintaining any spray equipment for sure the gun....
Posted on Oct 22, 2014
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Posted on Jan 02, 2017
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