Graco Inc 308876, 965786, 965767, 243666 Troubleshooting, Relief Procedure on Relieve the pressure

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Troubleshooting

WARNING

SKIN INJECTION HAZARD

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure

Relief Procedure on page 8.

1.Relieve the pressure.

2.Check all possible causes to the problem before disassembling the pump.

PROBLEM		CAUSE	SOLUTION

Valve does not open		Insufficient air pressure	Turn on or turn up air pressure.

		Air not exhausted from behind air cylin-	Use four-way, relieving-type air valve operator.
		der piston
		Shaft adjustment too far closed	Adjust the shaft stroke as instructed on page 9.

Valve	does not close	Insufficient air pressure	Turn on or turn up air pressure.
(leaks)
		Air not exhausted from behind air cylin-	Use four-way, relieving-type air valve operator.
		der piston
		Blockage between needle and seat	Remove and clean needle and seat.

		Bad or missing gasket between seat	Replace gasket (38).
		and housing
		Needle worn out	Replace needle and seat.

Higher	than normal	Nosepiece plugging up	Remove and clean.
back-pressure

10 308876

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Contents Instructions-Parts List 1K Ultra-Lite tTable of Contents SymbolsEquipment Misuse Hazard Fire and Explosion Hazard Features How to Use the Valve Trigger Safety InstallationGrounding Connections Electric Switch Hand Held ValveAir Switch Hand Held Valve Machine Mount ValveOperation Pressure Relief ProcedureElectric Switch Hand Held Valve Machine Mount ValvePreventative Maintenance MaintenanceAir Switch Hand Held Valve To adjust the shaft strokeTroubleshooting Relief Procedure on Relieve the pressureDisassembly ServiceModels 965766, 965767, 965768, and 965786 only Air Cylinder Section Models 965766, 965767, 965768, and 965786 only ReassemblyFluid Section Electric Switch Air Valve if equippedModels 965766 965768, and 965786 only 28, 29 20 21 22308876 Parts Description Qty ModelAutomatic Machine Mount Valve Orbiter Mounted ValveOnly Models 243482 and 243666 only Models 243482 and 243666 only Reassembly 28, 29 20 4015 45 2 9 10 30 19 18 16 26 38 28, 29 20 21 Hand Held Valve with Pneumatic Trigger SpringHand Held Valve with Electric Switch Accessories Nozzle Bushing Fluid NozzlesKits Technical Data Category DataDimensions 308876 Graco Information Graco Standard WarrantyToll Free