TROUBLESHOOTING
PROBLEM
Sags or runs
Dry spray
Striped or uneven coverage
Spitting or spraying lumps
Weak or no spray
Top-or bottom-heavy
pattern or heavy right or left
side pattern
Fluttering spray
Paint leaking from guide nut
Paint leaking from front
of gun.
CAUSE
A.
Too much paint.
B.
Gun moving to slowly.
C.
Paint too thin.
D.
Gun held at incorrect angle or too close to painting
surface.
E.
Spray overlaps too much.
A.
Insufficient paint coming from the spray gun.
B.
Gun held too far from surface.
C.
Overspray from a preceding section when gun
is not held at right angle to painting surface.
D.
Spray patterns not well overlapped.
A.
Gun tilted or not held at right angle to painting
surface.
B.
Dirt or burrs on air-cap or paint tip cause heavy top
and bottom pattern
C.
Spray patterns not well overlapped.
A.
Solid particles in paint
B.
Loose paint tube.
A.
Low volume of paint from container due to blocked
air passageway in spray gun body.
B.
Paint not thin enough.
C.
Lid washer missing/dirty
A.
Air cap holes partially blocked.
B.
Obstruction on paint tip or dirt on air cap seat
or paint tip seat.
A.
Lack of paint.
B.
Blocked paint passages.
C.
Damaged paint nozzle or needle.
A.
Loose guide nut.
B.
Worn guide washer.
Needle not seated properly due to:
A.
Worn or damaged paint nozzle.
B.
Dirt or dried paint in nozzle.
C.
Guide washer too tight preventing needle
from seating.
D.
Broken spring.
E.
Scored or damaged needle.
F.
Leaking from container
REMEDY
A.
Turn paint control knob counterclockwise.
B.
Move gun faster.
C.
Add unthinned paint to achieve correct time through
viscosity test cup.
D.
Hold gun at right angle to the painting surface at a
distance of 10-12 inches.
E.
Overlap spray by approximately 1/3 width of spray
pattern.
A.
Turn paint control knob clockwise.
B.
Hold gun at a distance of 10-12 inches or closer for
small objects.
C.
Hold gun at right angle to the painting surface.
D.
Overlap spray by approximately 1/3 width of spray
pattern.
A.
Hold the gun at right angles to painting surface.
B.
Clean or replace air-cap or paint tip.
C.
Overlap spray by approximately 1/3 width of spray
pattern.
A.
Strain paint.
B.
Ensure paint tube is firmly pushed into place.
A.
Clean passageway.
B.
Add the appropriate amount of solvent to the paint.
Add only a small amount of solvent to the paint at
one time.
C.
Replace/clean lid washer
A.
Determine if obstruction is on air cap or paint tip by
making a test pattern, rotating air cap half turn, and
spraying another test pattern. If defect is inverted,
obstruction is on air cap.
B.
Clean air cap with non-metallic instrument. If
obstruction is on paint tip, check for fine burring
which can be removed with 600 wet or dry
sandpaper. For dried paint inside, open and wash.
A.
Refill container.
B.
Clean.
C.
Clean needle set or replace if necessary.
A.
Tighten guide nut.
B.
Replace guide washer.
A.
Replace nozzle.
B.
Clean nozzle.
C.
Loosen guide washer.
D.
Replace spring.
E.
Replace needle.
F.
Place petroleum jelly on top of the container where
it contacts the seal.
9
ENGLISH