| [ Total Views: 1083 | Total Replies: 8 | Thread Id: 78346 ] |
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 pete wood
A.k.a.: figure itout
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 posted on August 11th, 2009 at 03:10 PM |
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ahhhhh!!! gun spitting can't stop it!
I have a gravity fed spray gun that I just can't get to stop spitting. I've got acrylic gloss in it (1.4mm nossle) and I've cleaned it within an
inch of it's life yet it's spitting like a rabid camel!
what am I missing?! 
should I clean it out with thinners first?
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matt
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| posted on August 11th, 2009 at 05:06 PM |
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maybe the thinners are affecting the acrylic (if it is water based)??????? or the paint is still to thick
matt
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 helbus
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| posted on August 11th, 2009 at 07:11 PM |
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Sounds like needle is not fully returning after action.
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lohoon
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| posted on August 11th, 2009 at 07:48 PM |
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make sure the fluid tip is tight and the needle is seating properly.
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helbus
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| posted on August 11th, 2009 at 08:34 PM |
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You could also check the gland nut on the main needle is not too tight and stopping the needle from returning. Or the spring tension on the back of
the needle is not tight enough. Or the needle is not clean along the shaft and is gripping on the gland seal. So many reasons, fixes etc. If full
disassemble, clean and reassemble give the same problem, then there must be a part needing replacement, or a different adjustment.
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pete wood
A.k.a.: figure itout
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| posted on August 11th, 2009 at 11:43 PM |
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sorry, I didn't make myself clear. it spits rather than spraying the paint evenly. the paint is reasonably thick, but I thinned it down a fair bit I
thought. does it need to be thinned more?
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pete wood
A.k.a.: figure itout
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| posted on August 12th, 2009 at 02:50 PM |
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just pulled it apart again and cleaned it within an inch of it's life. not sure if it's any better though. 
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Dirtbag
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| posted on August 13th, 2009 at 09:44 PM |
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Hi Pete. Acrylic needs to be thinned 100 parts paint to 150 parts thinners. So 1 litre of paint when thinned is 2.5 litres, so it's pretty runny. As
for the 1.4mm gun, that's a little small for acrylic. It's more of a 2 pac nozzle set up. I use 1.7mm for acrylic. but seeing as you said you've
thinned it right out it shouldn't be the problem. Make sure the breather hole in the top of the cap isn't clogged. Like hellbus says, there are so
many things that can upset a spray gun.
Good luck.
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pete wood
A.k.a.: figure itout
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| posted on August 14th, 2009 at 10:28 AM |
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thanx mate, I got it right. used a 1.8 nozzle and thinned it right down until it was runny enough. all good now.
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