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

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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.

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311051F

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Contents Automatic XT Spray Guns Contents Related ManualsOrifice Size In. mm ModelsCompliant Airspray Equipment Misuse Hazard Toxic Fluid or Fumes Hazard Selection Charts Hvlp Spray Gun AssembliesCompliant Spray Gun Assemblies Airspray Gun AssembliesGun Selection Proper Needle/Nozzle SelectionAir Caps Air Flow Hvlp Gun Air Cap PressureConfigure Gun and Manifold InstallationVentilate Spray Booth Non-circulating SystemInstall Air Fittings Ground SystemRetrofit Adapter Plate Mount GunReciprocating Arm Rod Mount Stationary SupportConnect Air Line SetupConnect Fluid Hose Flush Spray Gun Position Air CapAdjust Spray Pattern Compliant Hvlp and Compliant Gun LimitsAir Pressure Regulator Apply Fluid Pressure Relief ProcedureOperation IncorrectDaily Gun Care Clean and Flush Gun General System MaintenancePerform Pressure Relief Procedure, General Troubleshooting TroubleshootingProblem Cause Solution Troubleshooting Spray Pattern Troubleshooting Items Needed for Service ServiceReplace Fluid Packings and Air Seals Alternate Fluid Control Shown Reassembly Parts Exploded View Part No Gun ShownPart No. Description Qty PartsAir Caps Orifice Size LargeSpray Gun Assemblies all models Needle TipsManifold with Bottom Fluid Ports Description Qty Manifold with Side Fluid PortsSide Fluid Ports and Fan Adjustment Valve RING, Ptfe Accessories Dimensions Mounting Hole Layout Manifold Mounting Hole LayoutRear Port Manifold Retrofit Adapter Plate Gun with RetrofitTechnical Data Triggering SpeedGraco Standard Warranty Graco Information