The Stovebolt Site Forums The Shop Area Paint and Body Shop Compressor prsssure of regular paint gun

This is my first try with my Devilbiss JG-503 paint gun. I've painted with HVLP guns and know that the pressure to the gun needs to be within a certain spec. On a regular gun such as the JG-503, what pressure do I set my compressor at? Also, what is the difference between setting the paint cup to drip free or conventional suction. Any help would be much appreciated.
Thanks,
Don

I got this figured out, just read the spec's more closely. However, my problem at the moment is I can't get the gun to spray fluid. Air comes out of the tip, but it won't pick up any paint from the cup (bottom feed). I've check gaskets,tightness, etc., nothing helps. This is a gun a bought about five years ago, but has never been used.
Thanks,
don

What capacity compressor are you using and what do you have the pressure set to reaching the gun? Since it's been stored have you checked the pickup tube for obstruction? Also what paint are you trying to spray?

9 times out of 10 your paint is to thick to spray. Have you thinned it out? Will it pick up just plain thinner?
DG

Thanks again for the help. It turns out the problem was my stupidity. I bought another fluid tip for the gun to use for clear-coat. However, the gun didn't pick up paint from the cup with it. I thought I had gone back to the original fluid tip for troubleshooting purposes, but for some reason it was still the new tip. Once I finally realized that, I put on the original fluid tip and it worked great. Turns out even though the tips look almost identical, the new tip wouldn't work with a suction feed cup. The end result is I painted both the base coat and clear coat with the original tip (1.6) and it worked great. I made sure I adjusted the compressor for the PSI recommended for the base coat and clear coat (different settings). FYI: this is my third attempt to paint the truck (sanded down the first two). The first time I used a HVLP/turbine system and the second time a HVLP gun with the air compressor (different guns). The third time (this gun), I used a regular gun with my compressor. This time the results were great. I couldn't get rid of the orange peel with the first two systems. It may be I just wasn't skillful enough, but the regular gun worked great for me and clean-up was much simpler than the HVLP guns. Again, thanks for the responses. One of my troubleshooting rules is "go back to the thing you did last." I should have known.
don