Graco 334135B important safety instructions Problem Cause Solution

Troubleshooting

Problem	Cause	Solution
Machine dispensing off ratio	One tank is empty	Check tank levels. Add material if
		necessary.
	Tank ball valve closed	Open tank ball valve. Prime machine.
	Machine out of phase	Re-phase machine.
	Check valve malfunction	Remove check valve; clean or
		replace as necessary.
	Piston worn or broken	Replace piston.
Pumps drawing material back from	Check valve stuck open	Remove check valve, clean or
valve hose		replace as necessary.

38 334135B