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Daily Gun Maintenance
12 312579K
Troubleshooting
Problem Cause Solution
Spray Pattern Normal pattern. No action necessary.
Spray Pattern Dirty or damaged air cap or fluid
nozzle.
Rotate air cap 180°.
If pattern follows air cap, problem is in air
cap (13). Clean and inspect. If pattern is
not corrected, replace air cap.
If pattern does not follow the air cap, the
problem is with the fluid nozzle. Clean
and inspect the nozzle. If the pattern is
not corrected, replace nozzle.
Spray Pattern Pressure too high for viscosity of
material being sprayed.
Reduce air pressure and increase mate-
rial viscosity.
Correct pattern by narrowing fan size with
fluid control valve (8).
Spray Pattern Dirty or distorted air horn holes. Clean and inspect air cap. If pattern is not
corrected, replace air cap.
Gun spitting Air getting into paint stream. Check if cup is empty and fill.
Tighten fluid nozzle (11).
Check and tighten needle packing nut (17).
Check fluid nozzle (11) for damage.
Replace fluid inlet gasket (3)
Damaged fluid nozzle seal (19). Replace seal (19).
Will not spray Cup is empty. Fill cup.
Fluid control valve (8) turned too
far clockwise.
Adjust valve (8) counterclockwise.
Right
Wrong
Heavy top
or bottom
Wrong
Split pattern
Wrong