Graco 288844 Instructions Manual page 19

Problem
Fluttering or spitting spray.
Striping spray.
Irregular pattern.
Pattern pushed to one side,
same side of air cap gets dirty.
Material build up on air cap.
311001F
Cause
Insufficient fluid supply.
Air in paint supply line.
Attempting to "feather" (partially
trigger the gun).
Spray tip partially plugged.
Fluid build-up on spray tip, or
spray tip partially plugged.
On defective side of pattern, air
horn holes are partially or totally
plugged.
Air horn holes partially or totally
plugged.
Air pressure setting too high.
Solution
Adjust fluid regulator or fill fluid supply tank.
Check, tighten pump siphon hose connec-
tions, bleed air from paint line.
Cannot "feather" with an AA gun. Feather will
cause drastic reduction of pressure at the tip,
resulting in poor atomization and/or spitting.
Clean or replace spray tip. See page 14.
Clean or replace spray tip. See page 14.
Clean air horn holes with solvent and soft
brush. See page 14.
Clean air horn holes with solvent and soft
brush or toothpick. See page 14.
Reduce inlet air pressure. Seven to 10 psi
(4.9 to 7.0 kPa, 0.49 to 0.7 bar) air pressure
when triggered is recommended.
Troubleshooting
19