HP GRACO OR PRO TI1681A manual Gun Operation Troubleshooting

Page 38

Troubleshooting

Gun Operation Troubleshooting

Problem

Cause

Solution

 

 

 

Excessive spray fog.

Atomizing air pressure too high.

Close restrictor valve some, or

 

 

decrease air pressure as low as pos-

 

 

sible; minimum 40 psi (0.28 MPa, 2.8

 

 

bar) needed at gun for full voltage.

 

 

 

 

Fluid too thin.

Increase viscosity.

 

 

 

“Orange Peel” finish.

Atomizing air pressure too low.

Open atomizing air valve more or

 

 

increase gun air inlet pressure; use

 

 

lowest air pressure necessary.

 

 

 

 

Poorly mixed or filtered fluid.

Remix or refilter fluid.

 

 

 

 

Fluid too thick.

Reduce viscosity.

 

 

 

Fluid leaks from the fluid packing

Worn packings or rod.

Replace packings or rod; see page

area

 

45.

 

 

 

Air leaks from the front of the gun

Air valve (21) is not seating properly.

Clean and service air valve; see

 

 

page 50.

 

 

 

Fluid leakage from the front of the

Worn or damaged packing rod (26).

Replace; see page 45

gun

 

 

 

 

 

 

Worn fluid seat.

Replace fluid nozzle and/or electrode

 

 

needle; see pages 42 to 43.

 

 

 

 

Loose fluid nozzle (7).

Tighten; see page 42.

 

 

 

 

Damaged nozzle o-ring (7b).

Replace; see page 42.

 

 

 

Gun does not spray

Low fluid supply.

Add fluid if necessary.

 

 

 

 

Damaged air cap (9).

Replace; see page 42.

 

 

 

 

Dirty or clogged fluid nozzle (7).

Clean; see page 42.

 

 

 

 

Damaged fluid nozzle (7).

Replace; see page 42.

 

 

 

 

Damaged fluid adjustment valve (25).

Replace; see page 50.

 

 

 

Dirty air cap

Misaligned air cap (9) and fluid noz-

Clean fluid buildup off air cap and

 

zle (7).

fluid nozzle seat; see page 29.

 

 

 

38

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Contents Instructions/Parts List Table of Contents EN 50059 Compliant List of ModelsFM Approved Gun Model DescriptionSymbols Electric Shock HazardFire and Explosion Hazard Toxic Fluid HazardEquipment Misuse Hazard Pressurized Equipment HazardSpraying Waterborne Fluids Electrostatically IntroductionHow the Electrostatic Air Spray Gun Works Gun Overview Gun OverviewSystem Requirements InstallationInstall the System Fire, Explosion, and Electric Shock HazardTypical Installation PRO Xs Waterborne System Key Ground the Cabinet Ventilate the Spray BoothConnect the Air Line Connect the Waterborne Fluid HoseShielded Hose Unshielded HoseWaterborne Hose Dimensions At Graco WB100 Enclosure Unshielded fluid connectionAgitator Kit Agitator KitFluid Regulator Kit Fluid Regulator KitAir Caps Select a Fluid Nozzle and Air CapFluid Nozzles Grounding Check Electrical Grounding Check Gun GroundingOperating Checklist OperationTurn off the main air supply valve B Fire and Explosion Hazard Adjust the Spray PatternFill the Fluid Supply Fully open the fluid adjustment valve Air Regulator Settings Air Hose Length Air Regulator Setting Ft m Psi MPa, barWhen you finish spraying, perform the Shutdown procedure on Shutdown Low Voltage Adjustment Smart Guns OnlyLow Voltage Adjustment Maintenance Flush the Spray GunDaily Care and Cleaning Do not immerse the gun in fluidMaintenance Grease Door Latch Threads Clean the Air Cap and Fluid NozzleProcedure Equipment NeededElectrical Tests Test Gun ResistanceTest Power Supply Resistance Test Power Supply ResistanceTest Electrode Resistance ElectrodeTest Ground Strip Resistance Test Cylinder ResistanceSpray Gun TroubleshootingVoltage Loss Troubleshooting Waterborne Fluid HoseVisual Check TestsTroubleshooting Spray Pattern Troubleshooting Gun Operation Troubleshooting See Test Gun Resistance on Electrical TroubleshootingLowing the Fluid Voltage Discharge Grounding Procedure See Check Electrical Grounding on 18 and Test Gun ResistancePrepare the Gun for Service RepairAir Cap/Nozzle Replacement Electrode Replacement Electrode ReplacementFluid Packing Removal Fluid Packing RemovalPacking Rod Repair Packing RodBarrel Installation Barrel RemovalPower Supply Removal and Replacement Power SupplyTurbine Alternator Removal and Replacement Fan Air Adjustment Valve Repair Fan Air Adjustment ValveFluid Adjustment Valve Repair Air Valve RepairAtomizing Air Restrictor Valve Removal and Replacement ES ON/OFF Valve RepairParts TI1481a Description Qty Description Qty 51 Ref 19a TI1488A Description Qty SWITCH, ES HI/LO 271 253 276 228 262 NUT Bulkhead Connector 1/4 Tubing and Wiring Chart Code Length Description In. mmDetail of Control Box Tubing and Wiring DiagramsDetail of Door Interlock Switch Fluid Line Accessories AccessoriesAir Line Accessories Gun Accessories Miscellaneous AccessoriesPart No Agitator Accessory Kit items 402 407 401 406 403 408 404 406 RefPart No Fluid Regulator Accessory Kit items 506 507 502 505 503Data Technical DataCategory Toll Free Graco Standard WarrantyGraco Information