Graco 249369, 288217, 249377 important safety instructions Spray Pattern Troubleshooting

Troubleshooting

Spray Pattern Troubleshooting

Problem	Cause	Solution
Fluid flow is fluttering while spraying.	Fluid nozzle is not tight enough.	Tighten fluid nozzle to 60 in-lb (6.8
		N•m).
	O-ring (36) is missing or damaged.	Replace o-ring.
	Fluid filter is clogged.	Check fluid filter.
Fluid flow fades while spraying high	Fluid pressure is too low, causing	Raise fluid pressure at source or use
viscosity fluids.	fluid flow to reduce when gun is ele-	a smaller fluid nozzle.
	vated.
Pattern becomes off-set of heavy on	Air cap horn holes plugged or dam-	Clean air cap horn holes with
ends.	aged.	non-metallic item such as a toothpick,
		or replace air cap.
Gun fluid pressure is too high with	Using needle/nozzle kit with too small	Use needle/nozzle kit with larger ori-
gun triggered.	orifice.	fice.
Fluid system will not operate at low	There is no fluid regulator, or air reg-	Add low pressure fluid regulator, or
enough fluid pressure [below 10 psi	ulator on pressure pot is not sensitive	add more sensitive low pressure air
(70 kPa, 0.7 bar)].	enough at low pressures.	regulator on pressure pot.

22 311051F