Heavy top or bottom pattern
Horn holes plugged.
Clean. Ream with non-metallic point.
Obstruction on top or bottom of fluid tip.
Clean.
Cap and/or tip seat dirty.
Clean.
Excessive overspray.
Gun too far from work surface.
Adjust to proper distance.
Improper stroking (arcing, gun motion too Move at mode rate pace, parallel to
fast).
work surface.
Thin, sandy coarse finish
Gun too close to surface.
Check distance. Normally about 8”.
drying before it flows out.
Too much air pressure.
Reduce 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 about 8”.
“orange peel”
Too much material coarsely atomized.
Increase air pressure or reduce fluid
pressure.
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 instructions.
Surface rough, oily or dirty.
Properly clean and prepare surface.
Runs and sags.
Too much material flow.
Adjust gun to reduce fluid pressure.
Material too thin.
Mix properly or apply light coats.
Gun tilted on an angle, or gun motion too
Hold gun at right angle to work and
slow.
adapt to proper gun technique.
Fluid leaking from packing nut. Packing nut loose.
Tighten, do not bind needle.
Packing worn or dry.
Replace or lubricate.
Fluid leaking or dripping from Packing nut too tight.
Adjust.
front of pressure feed gun.
Dry packing.
Lubricate.
Fluid tip or needle worn or damaged.
Replace tip.
Foreign matter in tip.
Clean.
Fluid needle spring broken.
Replace.
Wrong size needle or tip.
Replace.
Dry spray.
Air pressure too high.
Reduce air pressure.
Gun tip too far from work surface.
Adjust to proper distance.
Gun motion too fast.
Slow down.
Gun out of adjustment.
Adjust.
Excessive fog
Too much, or too fast-drying thinner.
Remix properly.
Too much atomization air pressure.
Reduce pressure.
Jerky or fluttering pattern
Loose or damaged fluid tip/seat.
Tighten or replace.
Material level too low.
Refill.
Container tipped too far.
Hold more upright.
Obstruction in fluid passage.
Back flush with solvent.
Loose or broken fluid tube or fluid inlet
Tighten or replace.
nipple.
Dry or loose fluid needle packing nut.
Lubricate or tighten.
Heavy right or left side pattern Left or right side horn holes plugged.
Clean. Ream with non-metallic point.
Dirt on left or right side of fluid tip.
Clean.
Split spray pattern
Atomization air pressure too high.
Reduce at regulator or gun.
Fluid pressure too low (pressure feed only). Increase fluid pressure (increases gun
handling speed).
Spreader adjusting valve set too high.
Adjust.
Unable to get round spray
Spreader adjustment screw not seating
Clean or replace.
properly.
Air cap retaining ring loose.
Tighten.
Will not spray.
No air pressure at gun.
Check air supply and air lines.
Internal mix or pressure feed air cap and
Change to proper suction feed air cap
tip used with suction feed.
and tip.
Fluid pressure too low with internal mix
Increase fluid pressure at tank.
cap and pressure tank.
Fluid needle adjusting screw not open
Open fluid needle adjusting screw.
Fluid tool heavy for suction feed.
Thin material or change to pressure
feed.
Starved spray pattern.
Inadequate material flow.
Back fluid adjusting screw out to first
thread or increase fluid pressure at tank.
Low atomization air pressure (suction
Increase air pressure and rebalance
feed).
gun.
Too much atomization air pressure.
Reduce pressure.
Heavy center pattern
Fluid pressure too high for atomization air Balance air and fluid pressure.
(pressure feed).
Material flow exceeds air caps capacity.
Increase spray pattern width with
spreader adjustment valve.
Thin or lower fluid flow.
Spreader adjustment valve set too low.
Adjust. Increase pressure.
Material too thick.
Thin to proper consistency.
TROUBLESHOOTING
TROUBLESHOOTING (Continued)
16
17
Problem Encountered
Problem Encountered
Possible Cause
Possible Cause
Corrective Action
Corrective Action
Содержание 19220
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