TROUBLESHOOTING
11
a) Gun improperly adjusted.
b) Dirty air cap.
c) Fluid tip obstructed.
d) Sluggish needle.
Fan adjustment screw not seating
properly.
a) No air pressure at gun.
b) Fluid pressure too low with internal
mix cap and pressure tank.
c) Fluid control screw not open
enough.
d) Fluid too heavy for suction feed.
a) Packing nut loose.
b) Packing worn or dry.
a) Tighten, but not so tight as to grip
needle.
b) Replace packing or lubricate.
a) Check air supply and air lines.
b) Increase fluid pressure at tank.
c) Open fluid control screw.
d) Thin material or change to
pressure feed.
Clean or replace.
a) Re-adjust gun. Follow instructions
carefully.
b) Clean air cap.
c) Clean.
d) Lubricate.
Unable to get
round spray.
Improper spray
pattern.
Will not spray.
Fluid leakage
from packing nut.
PROBLEM
SOLUTION
SPRAY PATTERN/
CONDITION
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Gun held too close to surface.
a) Dry packing.
b) Sluggish needle.
c) Tight packing nut.
d) Worn fluid nozzle or needle.
a) Gun held too far from surface.
b) Atomization pressure set too high.
Move gun further from surface.
a) Move gun closer to surface.
b) Adjust atomization pressure.
a) Lubricate.
b) Lubricate.
c) Adjust.
d) For pressure feed, replace with
new fluid nozzle and needle.
Dripping from
fluid tip.
Thick, dimpled
finish resembling
orange peel.
Thin, sandy
coarse finish.
a) Loose air nozzle.
b) Material around outside of air
nozzle has dried.
a) Atomization air pressure is set too
high.
b) Trying to spray a thin material in
too wide a pattern.
a) Packing around needle valve is dried
out.
b) Fluid nozzle loosely installed, or dirt
between nozzle and body.
c) Needle sealing damaged.
a) Back up knurled nut, put a few drops of
machine oil on packing, retighten nut.
b) Take off fluid nozzle, clean rear of nozzle
and seat in gun body. Replace nozzle
and bring in tight to body.
c) Replace seal.
a) Reduce air pressure.
b) Increase material control by turning fluid
adjustment knob to left, while reducing
spray width by turning spray pattern
adjustment knob to right.
a) Trigger air nozzle.
b) Take off air nozzle and wipe off fluid tip,
using a rag moistened with thinner.
Intermittent spray
Soak nozzle in solvent to loosen clog, then
blow air through until clean. To clean orifices
use a broom straw or toothpick. Never try to
detach dried material with sharp tool.
One side of nozzle is clogged.
