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Troubleshooting
10
312412C
Troubleshooting
Problem
Cause
Solution
Normal pattern.
No action necessary.
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.
Pressure too high for vis-
cosity of material being
sprayed.
Reduce air pressure and increase material
viscosity.
Correct pattern by narrowing fan size with
the- fluid control valve (8).
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.
Will not spray
Cup is empty.
Fill cup.
Fluid control valve (8)
turned too far clockwise.
Adjust fluid control valve (8) counterclockwise.
Excessive air blowing
back
Loose fluid nozzle (11).
Tighten fluid nozzle (11).
Damaged fluid
nozzle seal (21).
Replace seal (21).
Gun fluid pressure is too
high with gun triggered
(cannot achieve desired
flow rate).
Using needle/nozzle kit
with too small orifice.
Use needle/nozzle kit with larger orifice.
Right
Wrong
Heavy top
or bottom
pattern
Wrong
Split pattern
Wrong