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Troubleshooting
WARNING
Follow Pressure Relief Procedure, page 3, before troubleshooting or servicing. Read warnings, page 2.
Problem
One side of air cap (1) dirty or clogged
a. Loose air cap (1).
b. Dried or damaged air cap (1) or fluid nozzle (2). b. Rotate air cap 180°.
a. Atomization air pressure set too high.
b. Spraying a thin material in too wide of a pattern. b. Increase material control by turning fluid adjustment knob (20) to
Air getting into paint stream.
a. Cup almost empty.
b. Dry needle packing (3).
Spitting
c. Fluid nozzle (2) too loose.
d. Dried material between nozzle (2) and gun
e. Damaged needle seal
Other spray pattern
a. Gun not properly adjusted.
problems
b. Sluggish needle (18).
Unable to get round
Pattern adjustment knob (7) not seating properly.
pattern.
Will not spray.
a. No air pressure at gun.
b. Cup empty.
c. Fluid adjustment knob (20) turned too far right.
d. Fluid too thick for gravity feed.
Fluid leaking from
a. Packing nut (4) loose.
packing nut (4).
b. Packing (3) worn or dry.
Fluid nozzle (2) dripping. a. Dry packing (3).
b. Sluggish needle (18).
c. Packing nut (4) too tight.
d. Worn fluid nozzle or needle.
Thin, coarse finish.
a. Gun held too far from surface.
b. Atomization air pressure set to high.
Thick, dimpled finish
Gun held too close to surface.
(resembling orange peel)
311104C
Cause
body.
Solution
Clean air cap orifices. See page 4. Blow air through orifices until
clean. If air cap holes are damaged, replace air cap.
a. Tighten.
If pattern follows air cap, problem is in air cap. Clean and inspect.
See page 4. 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. See page 4. If the pattern
is not corrected, replace nozzle.
a. Reduce air pressure.
left, while reducing spray width by turning pattern adjustment
knob (7) to right.
Or increase material viscosity.
a. Fill cup.
b. Loosen packing seat (4) and put a few drops of machine oil on
packing (3). Retighten seat (4).
c. Tighten.
d. Clean nozzle and front of gun. See page 4.
e. Replace seal. See page 6.
a. See page 3.
b. Clean and lubricate.
Clean or replace knob.
a. Check air supply and air lines.
b. Fill cup.
c. Adjust knob (20) to the left.
d. Thin material.
a. Tighten, but not so tight as to grip needle.
b. Lubricate or replace.
a. Lubricate.
b. Clean and lubricate.
c. Loosen.
d. Replace.
a. Hold gun about 6-8 inches (150-200 mm) from surface.
b. Reduce air pressure.
Hold gun about 6-8 inches (150-200 mm) from surface.
Troubleshooting
5
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