Graco Pro 270GS Operation page 25

Problem
When paint is sprayed, coverage is
inadequate.
Fan pattern varies dramatically while
spraying.
OR
Sprayer does not begin pumping
promptly when resuming spraying.
Cannot trigger spray gun.
Paint is coming out of pressure
control switch.
Prime/Spray valve actuates
automatically relieving pressure
through prime tube.
Paint leaks down outside of pump.
3A2818A
Cause
Coat is going on too thin.
Pressure control switch is worn and
causing excessive pressure variation.
Spray gun trigger lock is locked.
Pressure control switch is worn.
System is over pressurizing.
Pump packings are worn.
Troubleshooting
Solution
Move gun slower.
Choose tip with larger hole size.
Choose tip with narrower fan.
Make sure gun is close enough to
surface.
Take sprayer to Graco authorized
service center.
Rotate trigger safety lever to unlock
trigger lock, page 8.
Take sprayer to Graco authorized
service center.
Take sprayer to Graco authorized
service center.
Replace pump packings.
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