Troubleshooting
3A5097C 25
Solvent pops or bubbles Sprayed surface drying before
solvent gas can be released
• Apply fluid in lighter coats to
allow for proper evaporation.
• Use the recommended
thinners.
• Follow the solutions for
Orange Peel Finish, Paint
Droplets Too Large in this
Troubleshooting Table.
No or slow fluid flow,
intermittent spray, or
fluttering spray
No material Check cup for material, see Startup,
page 12.
Trigger pin in UNLOCK position Check trigger pin location. Must be in
SPRAY position.
Wrong size fluid set being used Select proper fluid set for fluid being
sprayed. Reference Fluid Set
Selection, page 9.
Gun fluid nozzle blocked by dried
paint or damaged
Clean or replace fluid nozzle
No cup pressurization Tighten cover or replace gasket
(siphon cup only)
Check for leaks in FlexLiner System.
See “FlexLiner System” section,
page 27.
Cup fitting or siphon tube (in
siphon cup) blocked by dried
paint or is damaged
Clean cup fitting, material strainer
and siphon tube (if applicable)
Check for obstructions in gun tubing.
Clean or replace gun tubing if
necessary.
Air flow to cup blocked Siphon cup: Remove cup (leave
cover connected). Trigger gun and
check air flow out of check valve. If air
is not flowing freely, clean or replace
check valve.
Fluid in the check valve (siphon
cup only)
Clean check valve. Reference
Cleaning Quick Clean Check Valve
(Siphon Cup only), page 22.
Plugged material strainer Replace material strainer if plugged
or remove if material is highly
viscous.
Needle packings not properly
adjusted.
Note: Fluid loss through
packings affects fluid pressure
and causes a fluid leak from gun
body.
Clean gun body with solvent and
brush provided. Adjust needle
packing.
Fluid leaks at fluid nozzle
after trigger is released
Needle not seating in fluid nozzle Check for a loose fluid nozzle or a
bent nozzle or needle; tighten nozzle
or replace parts as needed.
Packing nut is too tight Loosen packing nut slowly until
needle returns freely.
Poor spray pattern Air cap horn hole and/or fluid
nozzle plugged
Soak air cap and/or fluid nozzle in
solvent. Clean air cap horn holes with
non-metallic item to avoid
permanently damaging them.
Problem Cause Solution
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