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Troubleshooting
38 313872N
Burst of air from muffler when gun is
triggered
Normal No action required
Steady air leakage from muffler Damaged air valve Replace
Damaged air gasket Replace
Damaged piston o-rings Replace
Leak between air cylinder and fluid
housing
Damaged o-ring Replace
Material leaking out weep ports in
fluid housing near air cylinder
Mix module and rear seal worn Inspect and replace mix module and
rear seal, clean fluid housing
Material is spraying out of nozzle Flow rate is too high Change one or more of the following
variables to obtain a flow rate of
10 to 15 pounds per minute
• Orifice size
• Material Temperature
Problem Cause Solution