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6. Trouble Shooting
Symptom
Problems
Solution
Fluttering or
spitting
1. Material level too low.
2. Container tipped too far.
3. Loose fluid inlet connection.
4. Loose or damaged fluid tip/seat.
5. Dry or loose fluid needle packing
nut.
6. Air vent clogged
1. Add material into container.
2. Hold more upright.
3. Tighten.
4. Adjust or replace.
5. Lubricate and or tighten.
6. Clear vent hole.
Pattern is arc.
1. Worn or loose Fluid nozzle.
2. Material builds up on Air cap.
1. Tighten or replace Fluid nozzle.
2. Remove obstructions from holes,
But don
’t use metal objects to clean it.
Pattern is not
Evenly spread.
1. Material builds up on Air cap.
2. Fluid nozzle dirty or worn.
1. Clean or replace Air cap.
2. Clean or replace Fluid nozzle.
The center of Pattern
too narrow.
1. Material too thin or not enough.
2. Atomization air pressure too
high.
1. Regulate material viscosity.
2. Reduce air pressure.
Pattern width of
fan-sharp is not
enough.
1. Material too thick.
2. Atomization air pressure too low.
1. Regulate material viscosity.
2. Increase air pressure.
Air leaking from
air cap without
pulling trigger
1. Sticking air valve stem
2. Contaminate on air valve or seat
3. Worn or damaged air valve or
seat
4. Broken air valve spring
5. Bent valve stem
1. Lubricate
2. Clean
3. Replace
4. Replace
5. Replace
Fluid leaking from
packing nut
1. Packing nut loose
2. Packing worn or dry
1. Tighten, but do not restrict needle
2. Replace or lubricate (non-silicone oil)
Excessive
overspray
1. Too high atomization pressure
2. Too far from work surface
3. Improper stroking (arcing, gun
motion too fast)
1. Reduce pressure
2. Adjust to proper distance
3. Move at moderate pace, parallel to
surface.
Will not spray
1. No pressure at gun
2. Fluid control not open enough
3. Fluid too heavy
1. Check air lines
2. Open fluid control
3. Thin fluid or change to pressure feed
system.
