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TROUBLESHOOTING AND SERVICE CHECKS
CONDITION
A. Heavy top or
bottom pattern
B. Heavy right or left
side pattern
C. Heavy center pattern
D. Split spray pattern or
reduced fluid flow
E. Jerky or fluttering spray
F. Improper spray pattern
G. Unable to get round spray
H. Will not spray
Normal Spray Pattern:
Proper gun adjustment will result in a
normal spray pattern of this shape.
CAUSE
Material build up on air cap, partially plugged
horn holes, center hole or jets. Material
buildup on orifice of spray head or partially
plugged orifice.
Note: To determine where material buildup is, invert cap and test spray. If pattern shape stays
in the same position, the condition is caused by material buildup in spray head. If pattern
changes with cap movement, the condition is in the air cap.
Too much material.
Material too thick.
Insufficient horn (fan) air.
Not enough material or too high atomization
pressure.
Excessive horn (fan) air.
Loose air cap.
Obstructed fluid passage or tube.
Loose or cracked fluid tube in cup or tank.
Insufficient fluid in cup or pressure tank.
Gun improperly adjusted.
Dirty air cap or fluid tip (nozzle) exterior.
Spray head orifice obstructed.
Baffle seal (11) mis-shaped, out of position,
or damaged.
Spray head loose.
Fan adjustment screw not seating properly.
No air pressure at gun.
Fluid pressure too low.
Fluid control knob not open enough.
If using pneumatic trigger, large air leak
ahead of piston.
SB-2-226-B
CORRECTION
1. Soak cap or spray head in suitable solvent
and wipe clean. To clean orifices use a broom
straw or toothpick. Never use a wire or hard
instrument. This damages holes and distorts
spray pattern.
Reduce fluid flow by turning fluid control knob
clockwise. Reduce fluid pressure or increase
atomization pressure.
Thin.
Increase horn air if not fully open.
Reduce air pressure or increased fluid flow by
turning fluid control knob counterclockwise or
increase fluid pressure on pressure feed
container.
Reduce horn air.
Tighten retaining ring.
Clean.
Tighten or replace.
Fill cup or tank.
Readjust gun. Follow instructions carefully.
Clean air cap or fluid tip.
Clean.
Replace or reposition.
Tighten spray head retaining ring.
Clean or replace.
Check air supply and air lines.
Increase fluid pressure at tank.
Open by turning counterclockwise.
See warnings on Page 4 of this manual.
Identify air leak source and correct.
Page 13
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