Troubleshooting

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.

313385B

PROBLEM

CAUSE

SOLUTION

Relieve Pressure, page 6. Remove