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Problem
No or slow fluid flow, intermittent
spray, or fluttering spray
Fluid leaks at fluid nozzle after trigger
is released
Poor spray pattern
310964B
Cause
Wrong size fluid set being used or
o-ring on nozzle missing
Gun fluid nozzle blocked by dried
paint or damaged
Cup or pressure pot cover not tight
enough or gasket damaged
Cup or pressure pot fluid tube
blocked by dried paint or damaged
Air flow to cup blocked
Needle packings not properly
adjusted
Note: Fluid loss through packings
affects fluid pressure and causes a
fluid leak from gun body.
Plugged inlet strainer
Needle not seating in fluid nozzle
Air cap horn hole and/or fluid nozzle
plugged
Troubleshooting
Solution
Select proper fluid set for fluid being
sprayed, page 17. Or put an o-ring on
nozzle.
Clean or replace fluid nozzle.
Tighten cover or replace gasket.
Clean or replace fluid tube.
To check, remove cup (leave cover
connected). Trigger gun and check
air flow out of duckbill valve. If air is
not flowing freely, clean or replace
duckbill valve.
Clean gun body with solvent and
brush provided. Adjust needle
packings.
Replace strainer if plugged or remove
strainer if material is high viscous.
Check for a loose fluid nozzle or a
bent nozzle or needle; tighten nozzle
or replace parts as needed.
Soak air cap and/or fluid nozzle in
solvent. Clean air cap horn holes with
non-metallic item to avoid
permanently damaging them.
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