Graco 309550ZAE important safety instructions Problem Cause Solution

Page 24

Troubleshooting

PROBLEM	CAUSE	SOLUTION


A and/or B fluid in gun air section.	Damaged side seals (18c).	Replace, page 29.

	Damaged mix chamber (19).	Replace, page 29.

	Damaged side seal o-rings (18d,	Replace, page 29.
	18e).

	Tightened air cap with fluid valves	Close valves first.
	(12b) open.

Fluid mist from mix chamber or air	Damaged side seals (18c).	Replace, page 29.
cap.

	Damaged side seal o-rings (18d,	Replace, page 29.
	18e).

	Damaged mix chamber (19).	Replace, page 29.

Excessive overspray.	Too much cleanoff air.	Reduce, page 13.

Rapid buildup of material on air cap.	Plugged air cap holes.	Clean, page 20.

	Too little cleanoff air.	Increase, page 13.

	Damaged/missing fluid housing	Replace, page 29.
	o-ring (23).

	Damaged front o-ring (3).	Replace, page 29.

Reduced cleanoff air.	Damaged front o-ring (3).	Replace, page 29.

Excessive cleanoff air when fluid	Damaged/missing fluid housing	Replace, page 29.
valves are closed and gun is trig-	o-ring (23).
gered.

Fluid does not shut off when fluid	Damaged fluid valves (12b).	Replace.
valves are closed.

Burst of air from muffler when gun is	Normal.	No action required.
triggered.

Steady air leakage from muffler.	Damaged air valve o-rings (24).	Replace, page 33.

	Damaged piston o-rings (16, 17).	Replace, page 32.

Air leakage from front air valve.	Damaged air valve o-rings (24).	Replace, page 33.

Air leak around lock ring.	Damaged o-ring (21).	Replace, page 29.

Cannot tighten retaining ring (9) until	Air cap (10) assembled before retain-	Install retaining ring (9) first, then air
it bottoms out.	ing ring (9).	cap (10), page 30.

24

Image 24

Contents Plural Component, Impingement Mix Air Purge Spray Gun Psi 24.5 MPa, 245 bar Maximum Fluid Working PressureContents Manual ConventionsList of Models/Mix Chamber Selection Guide Round Pattern GunsFlat Pattern Guns Flat Pattern Stud Wall Gun Spatter Pattern Gun Wide Round Pattern GunFour-Hose Gun Non 11 Ratio GunsPersonal Protective Equipment Fire and Explosion Hazard Overall View KeyPiston Safety Lock Isocyanate HazardKeep a and B Components Separate GroundingFollow Pressure Relief Procedure, Turning Air CapLoss of Air Pressure Setup Resin ISOSetup Shutdown Pressure Relief Procedure Optional Configurations Optional Fluid ManifoldPosition Remove Front End,Follow Pressure Relief Procedure, page 15. Also Optional Hose PositionFlat Spray Tips Maintenance Clean Outside of Gun Clean Air CapClean Muffler Clean Fluid Manifold Clean Mix Chamber Nozzle Clean Passages Clean Impingement Ports Nozzle Drill Bit SizesImpingement Port Drill Bit Sizes CbipTroubleshooting Problem Cause SolutionProblem Cause Solution Theory of Operation Gun Triggered Fluid SprayingGun Detriggered Air Purging Cutaway View Repair Tools RequiredLubrication Remove Front EndAttach Front End X ZMix Chamber and Side Seal Cartridges 18 B18c 18b 18d Check Valves Piston Piston Safety Lock Air ValveParts Check Valve 26 DetailPart No. Description Qty Round Pattern Guns,See Flat Pattern Guns, See Supplied Tools,Detail Views Mix Chamber Kits Round Pattern GunsFlat Pattern Guns Mix Chamber Part No. Reference GuideFlat Tip Kits Gun Repair KitsCheck Valve Filter Screen Kits Flat Tip Part No. Reference GuideDrill Bit Kits Kit Part No Qty in Kit Drill Bit Size Illustration NominalAir Purge Handle Cleanout Drill Kit Drill Bit Kit119386 248969Accessories Wide Pattern Mix Chamber KitsStainless Steel Side Seal Kits Polycarballoy Side Seal KitsExtension Tip Kits Extension Tip Seal KitsExtension Tip Air Cap Kit Flat Pattern Stud Wall KitSpatter Conversion Kit Solvent Flush Canister KitPour Nozzle Kit Gun CoverTip Cleanout Tool Gun Cleaning KitCirculation Manifold Technical Data Air Flow Data in scfm m3/minCategory Data Graco Standard Warranty For Graco Canada Customers