Page 10 SB-2-001-F
CONDITION
CAUSE
CORRECTION
Dry Spray
Air pressure too high.
Decrease air pressure.
Material not properly reduced
Reduce to proper consistency.
(suction feed).
Gun tip too far from work surface.
Adjust to proper distance.
Gun motion too fast.
Slow down.
Gun out of adjustment
Adjust.
Fluid leaking from
Packing nut loose.
Tighten, do not bind needle.
packing nut
Packing worn or dry
Replace or lubricate.
Fluid leaking or dripping
Packing nut too tight
Adjust
from front of pressure
feed gun
Dry packing.
Lubricate.
Fluid tip or needle worn or
Replace tip & needle with lapped
damaged
sets.
Foreign matter in tip.
Clean.
Fluid needle spring missing or
Replace.
broken.
Wrong size needle or tip.
Replace.
Needle bound by misaligned
Tap sprayhead perimeter with a
sprayhead, (MBC guns only).
wooden mallet. Retighten lock bolt.
Runs and sags
Too much material flow.
Adjust gun or reduce fluid pressure.
Material too thin.
Mix properly or apply light coats.
Gun tilted on an angle.
Hold gun at right angle to work and
adapt to proper gun technique.
Thin, sandy coarse finish
Gun too far from surface.
Check distance. Normally 6-8" - HVLP,
drying before it flows out
8-10" - conventional.
Too much air pressure.
Reduce air pressure and check
spray pattern.
Improper thinner being used.
Follow paint manufacturer's
mixing instructions.
Thick, dimpled finish
Gun too close to surface.
Check distance. Normally 6-8" - HVLP,
"orange peel". Too much
8-10" - conventional.
material coarsely
atomized
Air pressure too low.
Increase air pressure or reduce
fluid pressure.
Improper thinner being used.
Follow paint manufacturer's
mixing instructions.
Material not properly mixed.
Follow paint manufacturer's
mixing instructions.
Surface rough, oily, dirty.
Properly clean and prepare.
