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Troubleshooting
8 313385B
Troubleshooting
Before performing any Troubleshooting procedures, follow Pressure Relief procedure on page 6.
PROBLEM CAUSE SOLUTION
No material output from pump Not enough air pressure to pump Shut off air at the gun, and increase air
pressure to the pump to maximum.
Turn regulator clockwise to increase.
Material too thick Thin the material. Material must be
mixed thoroughly to a consistency that
immediately folds back in as you draw
your finger through the surface of the
material.
Damaged checkballs or seats Replace checkballs or seats.
Plugged gun or nozzle Relieve Pressure, page 6. Remove
gun from material hose, and cycle
pump.
NOTE: A plugged gun or nozzle may
cause the hose and pump to plug. If
necessary, flush hose and pump with
clean water before cycling material
through the hose with the gun
removed.
Plugged hose, or hose too small Relieve pressure, page 6. Flush hose
with clean water, or try a 1-1/4 in. hose.
Pump stops pumping Stalled pump Shut down system. Relieve Pressure,
page 6. Restart.
Contact an authorized Graco service
center.
Pump in need of repair See texture pump instruction manual
308479.
Pulsing or surging material Triggering too fast Slowly squeeze trigger to fully open
position while moving gun quickly in a
circular motion.
Speed of application too slow Not enough air pressure to pump Shut off air at the gun, and increase air
pressure to the pump to maximum.
Turn regulator clockwise to increase.
Material too thick Material must be mixed thoroughly to a
consistency that immediately folds
back in as you draw your finger through
the surface of the material.
Nozzle too small Increase nozzle size.
Hose plugged or too small. Relieve Pressure, page 6. Clean hose,
or try a 1-1/4 in. hose.
Pump in need of repair See texture pump instruction manual
308479.