Graco Inc TI3840a, 309856P, 2004230905 Troubleshooting, See Clean Purge Rod

Page 30

Troubleshooting

Troubleshooting

1.

2.

Follow Pressure Relief Procedure, page 18,

before checking or repairing gun.

Check all possible problems and causes before

disassembling gun.

CAUTION

To prevent cross-contamination of the gun’s wetted parts, do not interchange A component (isocyanate) and B component (resin) parts.

PROBLEM	CAUSE	SOLUTION


Gun does not fully actuate when trig-	Piston safety lock engaged.	Disengage piston safety lock, page
gered.		12.

	Plugged muffler (22).	Clean, page 22.

	Damaged air valve o-rings (24).	Replace, page 44.

Fluid does not spray when gun is fully	Closed fluid valves (12b).	Open.
actuated.

	Plugged impingement ports.	Clean, page 23.

	Plugged check valves (36).	Clean, page 41.

Gun actuates slowly or with delayed	Plugged muffler (22).	Clean, page 22.
action.

	Damaged piston o-rings (16, 19).	Replace, page 42.

	Dirty air valve, or damaged o-rings	Clean air valve or replace o-rings,
	(24).	page 44.

	Mix module nut (25) too tight.	Loosen nut, then retighten, page 37.

	Incorrect purge rod adjustment.	Adjust Purge Rod, page 15.

	Loose lock ring (11).	Tighten, use tool if necessary. Adjust
		Purge Rod, page 15.

Purge rod will not actuate.	No air pressure.	Connect air supply.

	Low air pressure.	Set air pressure above 80 psi (0.56
		MPa, 5.6 bar).

	Buildup on purge rod (31).	See Clean Purge Rod, page 27.

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309856P

Image 30

Contents Plural Component, Impingement Mix Mechanical Purge Spray Gun Contents Manual Conventions List of Models/Selection Guide Standard Round Pattern GunsPressure in psi MPa, bar Standard Flat Pattern Guns Direct Impingement Round Pattern Guns Flow Rate in gpm lpmDirect Impingement Flat Pattern Guns Four-Hose Gun Personal Protective Equipment Fire and Explosion Hazard Overall View KeyKeep a and B Components Separate Piston Safety LockIsocyanate Hazard GroundingSetup ISODisengage piston safety lock, Adjust Purge Rod 1/4 TurnAdjust Flat CeramTip Daily Shutdown Follow Pressure Relief Procedure,Shutdown Shutdown for More than a DayPressure Relief Procedure Optional Configurations Optional Fluid Manifold PositionFluid Hoses Follow Pressure Relief Procedure, page 18. AlsoOptional Hose Position Air HoseMaintenance Clean Muffler Clean Outside of GunClean Air Cap Clean Fluid ManifoldClean Slip-Fit Polycarballoy Mix Module Cleaning Component a ISO PortsImpingement Port Cleanout Drill Sizes Impingement Port Drill Counterbore DrillXF1313 #81 Cleanout Drill Sizes for Round CeramTips Clean CeramTipExternal Quick Cleaning Method Round CeramTip Clean Purge Rod Adjust Purge Rod, Stuck Purge Rod Adjust Front Rod Seal Reassemble Front End, Adjust Purge Rod,Disassemble Front End, Adjust Rear Rod Seal Troubleshooting See Clean Purge Rod,Adjust Rear Rod Seal, Theory of Operation Gun Triggered Fluid SprayingGun Detriggered Mechanical Purging Cutaway View Lubrication RepairTools Required Replace CeramTipDisassemble Front End Reassemble Front End Adjust Purge Rod, Slip-Fit Polycarballoy Mix Module Attach fluid manifold. Return gun to service Rear Rod Seal Check Valves Piston and Purge Rod Install piston safety lock assembly until bottomed out Piston Safety Lock Air Valve309856P Parts Flush Manifold DetailPart No. Description Qty HandleStandard Round Pattern Guns Slip-Fit Polycarballoy Mix Module KitsSlip-Fit Polycarballoy Mix Module Part Numbering Code Standard Flat Pattern GunsDirect Impingement Round Pattern Guns Direct Impingement Flat Pattern GunsFlat CeramTip Part Numbering Code CeramTip KitsRound CeramTip Part Numbering Code Flat CeramTipsDrill Bit Kits Kit Part No Qty in Kit Drill Bit Size Illustration NominalGun Repair Kits Check Valve Filter Screen Kits 10 per kitAccessories Solvent Flush Pail Kit Hose Adapter KitsPour Nozzle Kit Technical Data Category DataGraco Standard Warranty Graco InformationToll Free