User's Manual

Troubleshooting
311776B 9
Troubleshooting
Problem Cause Solution
Material will not flow from hopper • Material too thick
• Not enough air
• Gun adjustment set too low
• Nozzle too small
• Gun is plugged
• Not enough material in hopper
• Thin material
• Open gun air valve more
• Increase trigger travel
• Increase nozzle size
• Clean gun
• Add material
Pattern too fine. • Material too thin
• Air pressure too high
• Gun needle travels too low
• Nozzle too small
• Thicken
• Close gun air valve partially
• Increase
• Replace nozzle with larger size
Pattern too course. • Material too thick
• Air pressure too low
• Nozzle to large
• Thin material
• Open gun air valve more
• Replace nozzle with smaller size
Gun will not shut off • Worn nozzle or needle
• Nozzle not on all the way
• Debris in needle passage
• Relieve Pressure, page 3 and
replace worn parts
• Tighten completely
• Relieve Pressure, page 3 and
clean
Fluid leaking at Flow Adjustment Nut • Damaged seal • Relieve Pressure, page 3 and
replace seal
Fluid leaking out of either plug • Missing or damaged o-rings
• Gun damaged
• Relieve Pressure, page 3 and
replace o-ring
• Replace gun
Needle adjustment won’t adjust • Dirty threads
• Nozzle not on gun
• Needle triggered
• Clean threads
• Put nozzle on gun
• Adjust when trigger not pulled
Material leaking out around gun/hop-
per connection
• Clamp not tight
• Damaged gun/hopper
• Debris between gun/hopper
• Tighten
• Check for damage and replace if
needed
• Remove hopper from gun, clean,
and replace hopper if needed