Graco 3A2495C important safety instructions Electrode Replacement, See Test Gun Resistance

Page 41

NOTICE

Do not overtighten the fluid seat housing (24). Overtightening may damage the housing and the gun barrel, resulting in improper fluid shutoff.

6.Trigger the gun and install the fluid seat housing (24). Tighten until snug, then 1/4 turn more.

7.Check that the spray tip gasket (27a) is in place. Align the spray tip tab with the groove in the air cap (25). Install the spray tip (27) in the air cap.

8.Make sure that the electrode (25a) is installed correctly in the air cap.

9.Check that the air cap o-ring (25b) is in place.

10.Check that the u-cup (22a) is in place on the retaining ring (22). The lips of the u-cup must face forward.

NOTICE

To avoid damaging the tip guard, orient the air cap assembly (25) before tightening the retaining ring (22). Do not turn the air cap when the retaining ring is tight.

11.Orientate the air cap and tighten the retaining ring securely.

12.See Test Gun Resistance, page 32.

Repair

Electrode Replacement

To reduce the risk of fire, explosion, or electric shock, do not operate the spray gun without the electrode installed in the air cap.

1.See Prepare the Gun for Service, page 39.

2.Remove the air cap assembly (25). See Air Cap, Spray Tip, and Fluid Seat Housing Replacement, page 40.

3.Pull the electrode (25a) out of the back of the air cap, using a needle-nose pliers.

4.Push the new electrode through the air cap hole. Make sure the short end (BB) of the electrode engages the hole (CC) in the back of the air cap. Press the electrode in place firmly with your fingers.

5.Install the air cap assembly.

6.See Test Gun Resistance, page 32.

Figure 24 Replace Electrode

3A2495C

41

Image 41
Contents Instructions Important Safety InstructionsContents II 2 G Smart Display Standard DisplayFIRE, EXPLOSION, and Electric Shock Hazard Skin Injection Hazard Equipment Misuse Hazard How the Electrostatic AA Spray Gun Works Gun OverviewSetup Checklist, Chart, page 62, for availDescription Purpose See Spray Tip SelectionSmart Guns Operating Mode Bar GraphError Display Key for Figs Description Purpose Description Purpose Diagnostic Mode Alternator Speed Hertz Screen Ventilate the Spray Booth InstallationHose Air Supply LineFluid Supply Line NON-HAZARDOUS Area Typical Installation Key DescriptionGun Setup Checklist Gun SetupGun Setup Pressure Drop LED Indicator Colors DescriptionGrounding Key to Figs Ground the Operator Ground the Gun Check Gun Electrical Grounding Check Fluid Resistivity Flush Before Using EquipmentCheck Fluid Viscosity Fluid Resistivity Levels Megohms-cmOperation Pressure Relief ProcedureStartup ShutdownFlushing MaintenanceClean the Gun Daily Maintenance Check Gun Electrical Grounding, Daily System CareTest Gun Resistance Electrical TestsAlternator Removal and Replacement, Test Power Supply ResistanceTest Gun Barrel Resistance Spray Pattern Troubleshooting TroubleshootingProblem Cause Solution Clean the Gun Daily,Gun Operation Troubleshooting Power Supply Removal Replacement,Replacement, page 45 Test Gun Resistance,Replacement, page 52 See Clean the Gun Daily,Repair Prepare the Gun for ServiceSee Prepare the Gun for Service, Air Cap, Spray Tip, and Fluid Seat Housing ReplacementSee Test Gun Resistance, Electrode ReplacementFluid Tube Removal and Replacement Fluid Filter ReplacementGun Barrel Removal Gun Barrel InstallationRemove Cap and Springs Fluid Needle ReplacementSee Prepare the Gun for Service, See Gun Barrel Removal, Power Supply Removal and ReplacementAlternator Removal and Replacement Alternator Fan Air Adjustment Valve Fan Air Adjustment Valve RepairAtomizing Air Adjustment Valve Repair ES On-Off Valve Repair Air Valve Repair See Gun Barrel Installation,Smart Module Smart Module ReplacementAir Inlet Fitting and Air Exhaust Valve Air Swivel and Exhaust Valve ReplacementParts Standard Air-Assisted Spray Gun AssemblyDescription Qty Smart Air-Assisted Spray Gun Assembly See Smart Module Assembly Part No N664 Alternator Assembly Alternator AssemblyPart No N632 ES On-Off Valve Assembly ES On-Off Valve AssemblyPart No N634 Fan Air Valve Assembly Fan Air Valve AssemblyAir Cap Assembly Smart Module Assembly AEM Fine Finish Spray Tips Spray Tip Selection ChartOrifice Fluid Output AEF Fine Finish Pre-Orifice Spray TipsOz/min l/min 41 bar MPa Bar Spray TipGun Accessories Repair Kits, Related Manuals, and AccessoriesSystem Accessories Test EquipmentHoses Operator AccessoriesGun Model In. mm Weight, oz g DimensionsTechnical Data Graco Information Graco Pro Xp Warranty