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308-08413
SPRAY PA
TTERN TROUBLESHOOTING CHART
WARNING
Installing
and
servicing this equipment requires access to parts which may cause electrostatic shock or other seri
-
ous
bodily injury if the work is not performed properly
.
Do not install or service this equipment unless you are trained
and
qualified.
To
reduce the risk of serious bodily injury
, including splashing fluid or solvent in the eyes or on the skin, always follow
the
Pressure Relief Procedure
on page 9 before checking, adjusting, cleaning or repairing the gun or any part of
the
system.
NOTE:
Check all possible remedies in the T
roubleshooting Charts before disassembling the gun.
PROBLEM: CAUSE
SOLUTION
IMPROPER SPRA
Y
PATTERN
Insuf
ficient fluid supply
.
Adjust fluid regulator or fill fluid tank.
Loose fluid nozzle or damaged
T
ighten or replace fluid nozzle.
fluid nozzle taper seat.
See page 19.
Dirt between fluid nozzle, taper
Clean. See page 1
1.
seat and body
.
Loose or cracked coupler at
T
ighten or repair
.
fluid inlet.
Loose fluid tube in tank.
Tighten.
Fluid build-up on air cap; partially
Clean with soft implement or
clogged horn holes. Full air pres-
submerge in suitable solvent and
sure from clean horn hole forces
wipe clean. See page 1
1.
fan pattern toward clogged end.
Bent electrode.
Straighten electrode
Damaged fluid nozzle or air
Replace damaged part. See
cap holes.
page 19.
Fluid build-up on the perimeter
Remove obstruction. Never use
of fluid nozzle orifice, or partially
wire or hard instruments. See
clogged fluid nozzle orifice
page 1
1.
Bent electrode.
Straighten electrode
T
oo high fan air pressure.
Reduce air pressure or adjust fan
air adjusting valve.
Fluid too thin.
Regulate fluid viscosity
.
Not enough fluid pressure
Increase fluid pressure.
Low fan air pressure
Increase air pressure.
Fluid too thick
Regulate fluid viscosity
.
T
oo much fluid.
Reduce fluid flow
.
Last coat of fluid applied too wet.
Apply drier finish with multiple
strokes.
T
oo much air pressure.
Use least air pressure necessary
.
Insuf
ficient air pressure.
Increase air pressure.
Non-uniform spray pattern.
Clean or replace air cap. See
page 1
1.
Fluttering
or spitting
spray
Streaks
NOTE: Some
improper patterns are caused by the improper balance between air and fluid.