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TROUBLESHOOTING (continued)
CONDITION
Fluid leaking or dripping
from front of pressure
feed gun
Runs and sags
Thin, sandy coarse finish
drying before it flows out
Thick, dimpled finish
"orange peel".
CAUSE
Packing nut too tight.
Dry packing.
Fluid tip or needle worn or damaged.
Foreign matter in tip.
Fluid needle spring broken.
Wrong size needle or tip.
Too much material flow.
Material too thin.
Gun tilted on an angle, or gun motion
too slow.
Gun too far from surface.
Too much air pressure.
Improper thinner being used.
Gun too close to surface.
Too much material coarsely atomized.
Air pressure too low.
Improper thinner being used.
Material not properly mixed.
Surface rough, oily, dirty.
CORRECTION
Adjust
Lubricate.
Replace tip and needle with lapped sets.
Clean.
Replace.
Replace.
Adjust gun or reduce fluid pressure.
Mix properly or apply light coats.
Hold gun at right angle to work and adapt to
proper gun technique.
Check distance. Normally approximately 8".
Reduce air pressure and check spray pattern.
Follow paint manufacturer's mixing instructions.
Check distance. Normally approximately 8".
Increase air pressure or reduce fluid pressure.
Increase air pressure or reduce fluid pressure.
Follow paint manufacturer's mixing instructions.
Follow paint manufacturer's mixing instructions.
Properly clean and prepare surface.
SB-2-252-J Page 7
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