User Manual

Troubleshooting
22 3A3258C
No air from compressor Gun air valve closed Open gun air valve.
Low voltage Check extension cord length
and gauge. Replace if differ-
ent than recommended. Refer
to Grounding and Electrical
Requirements, page 9.
Gun needle plugged Clean needle and retry.
Worn compressor Replace compressor. Contact
a qualified Graco Service Cen-
ter.
Lines not connected Check all quick disconnect
connections to gun and hoses.
Damaged hose. Replace hose.
Speed of application slow or
slower
Material too thick Thin material.
Nozzle too small Change nozzles to a larger
size. See Recommended Noz-
zle Selection Chart, page 15.
Too much air being used. Partially close gun air valve to
reduce air flow.
Pump hose worn Replace hose.
Plugged or dirty gun Perform Pressure Relief Pro-
cedure, page 9. Clean gun.
Kinked hose Unkink hose.
Gun adjustment set too low Increase flow adjustment with
flow adjustment nut.
Too many items on same cir-
cuit
Unplug other items from circuit.
Extension cord too long or
wrong gauge
Use a different extension cord.
Refer to Grounding and Elec-
tric Requirements, page 9.
Intermittent flow/sputtering Hopper connection not tight Check gasket. TIghten con-
nection.
Debris in system Clean system.
Quick disconnect does not stay
connected.
Dirty or corroded fitting Clean thoroughly. Soak in oil.
Apply a few drops of light oil.
Gun will not shut off Worn nozzle or needle. Perform Pressure Relief Pro-
cedure, page 9. Replace worn
parts.
Debris in needle passage Perform Pressure Relief Pro-
cedure, page 9. Clean.
Fluid leaking at Flow Adjust-
ment Nut
Damaged seal. Perform Pressure Relief Pro-
cedure, page 9. Replace seal.
Needle adjustment won’t
adjust
Dirty threads Clean threads.
Nozzle not on gun Put nozzle on gun.
Problem Cause Solution