Graco 254974 Operation Manual page 15

Problem
Speed of application slow or slower
Intermittent flow/sputtering
Quick disconnect does not stay con-
nected.
Gun will not shut off
Fluid leaking at Flow Adjustment Nut Damaged seal.
Fluid leaking out of either plug
Needle adjustment won't adjust
Cause
Material too thick
Nozzle too small
Too much air being used.
Pump hose worn
Plugged or dirty gun
Kinked hose
Gun adjustment set too low
Too many items on same circuit
Extension cord too long or wrong
gauge
Hopper connection not tight
Debris in system
Dirty or corroded fitting
Worn nozzle or needle.
Debris in needle passage
Missing or damaged o-rings
Gun damaged
Dirty threads
Nozzle not on gun
Troubleshooting
Solution
Thin material.
Change nozzles to a larger size. See
Recommended Nozzle Selection
Chart, page 11.
Partially close gun air valve to reduce
air flow.
Replace hose.
Relieve Pressure, page 6. Clean
gun.
Unkink hose.
Increase flow adjustment with flow
adjustment nut.
Unplug other items from circuit.
Use a different extension cord. Refer
to Grounding and Electric Require-
ments, page 6.
Check gasket. TIghten connection.
Clean system.
Clean thoroughly. Soak in oil. Apply a
few drops of light oil.
Relieve Pressure, page 6. Replace
worn parts.
Relieve Pressure, page 6. Clean.
Relieve Pressure, page 6. Replace
seal.
Relieve Pressure, page 6. Replace
o-rings.
Replace gun.
Clean threads.
Put nozzle on gun.
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