Graco Inc 313516C General Troubleshooting, Problem Cause Solution

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Troubleshooting

Troubleshooting

NOTE: Check all possible remedies in the trou- bleshooting charts before disassembling the gun.

Some improper patterns are caused by the improper balance between air and fluid. Refer to Spray Pattern Troubleshooting, page 22.

General Troubleshooting

Problem	Cause	Solution


Fluid leakage through venting	Worn packing (17) or needle (5).	Replace packing or needle.
holes.

Air leakage through venting hole.	Worn o-ring (9) or gasket (15).	Check and replace parts as
		needed.

Air leakage from back of gun.	Worn o-rings (8, 9).	Replace o-rings.

Air does not trigger.	Piston stem is disconnected from	Replace piston assembly.
	main body of piston assembly (3).
	Cylinder air pressure is too low.	Increase cylinder air pressure to
		50 psi.

Air does not shut off.	Piston assembly not seating	Clean/service piston assembly.
	properly.	Replace worn or swollen o-rings.
	Broken return spring (7).	Replace return spring.
	Swollen o-ring (8).	Replace o-rings.
	Worn piston stem o-rings (10, 11).	Replace o-rings.
	Bottom gasket (12) failed.	Replace gasket.

Fluid leakage from front of gun.	Fluid needle tip (5a) is dirty, worn,	Clean or replace fluid needle tip or
	or damaged.	entire needle (5).
	Dirty or worn nozzle (23).	Clean or replace nozzle.

Fluid is present at air cap holes.	Nozzle (23) is insufficiently tight-	Tighten or replace o-ring.
	ened or sealing o-ring (36) is dam-
	aged.

313516C

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Contents Automatic AirPro Spray Guns Important Safety InstructionsModels ContentsFire and Explosion Hazard Pressurized Equipment Hazard General Metal Applications Selection ChartsWood Applications High Wear ApplicationsGun Selection Hvlp GunsProper Needle/Nozzle Selection Air CapsConventional Guns Air Flow Atomizing Air Fan AirAir Flow Maximum HVLP/Compliant inlet manifold pressure Ventilate Spray Booth InstallationConfigure Gun and Manifold Circulating SystemGround System Install Air FittingsMount Gun Reciprocating Arm Rod MountStationary Support Retrofit Adapter Plate Mount Retrofit Adapter PlateSetup Connect Air LineConnect Fluid Hose Position Air Cap Flush Spray GunSuggested Starting Settings Atomization Adjust Spray PatternFan Air psi Spray GunAir Pressure Regulator Operation Pressure Relief ProcedureApply Fluid IncorrectDaily Gun Care Clean and Flush Gun General System MaintenanceTroubleshooting General TroubleshootingProblem Cause Solution Spray Pattern Troubleshooting Disassembly ServiceAlternate Fluid Control Shown Reassembly 17† 21† Alternate Fluid Control 20† 22† 36† 24a 25a PartsGasket Repair Kits General Metal ApplicationsNozzle Wood Applications High Wear ApplicationsPart Description Qty Manifold with bottom fluid portsPart No C342 Side Fluid Ports and Fan Adjustment ValveNot shown, optional size Not sold separately Part No only Description Qty106 Accessories Inline Fluid Filter 24B707 Hvlp Pressure Verification KitSpray Tip Filters Count Carton Pack DescriptionDimensions Manifold Models 288217 or 288218, All Gun ModelsManifold Model 288221, All Gun Models Manifold Model 288160 or 288211, All Gun Models Manifold Model 288223 or 24C342, All Gun ModelsMounting Hole Layouts 23.4 mm 10.2 mm 53.3 mm 50 in .7 mm Mounting hole 216 23.4 mm 10.2 mm 27.9 mm 375 in .5 mm Mounting hole Retrofit Adapter Plate Triggering Speed Technical DataSound Data Cylinder Air Fluid Pressure Air Pressure Msec to fullyGraco Standard Warranty Graco InformationGraco Headquarters Minneapolis