Graco Inc 222700 Test Power Supply Resistance, Test Resistor Stud Resistance, Electrical Tests

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Test Power Supply Resistance

Electrical Tests

Test Power Supply Resistance

1.Prepare the gun for service as instructed on page 30.

2.Remove the power supply (18) from the gun handle as instructed on page 40.

3.Remove the turbine alternator (37) from the power supply as instructed on page 41.

4.Measure the resistance from the power supply’s ground contact point (B) to the contact spring (18c) on the other end of the power supply. See Fig. 14.

5.The resistance should be 157.5 to 192.5 megohms. If the resistance is outside the specified range, the power supply is defective and must be replaced. If the resistance of the power supply is correct, proceed to the next test.

KEY-Fig. 14
A	Megohmmeter
B	Ground Contact Point	A

18Power Supply

18c Contact Spring

B

18c 18

Test Resistor Stud Resistance

1.Prepare the gun for service as instructed on page 30.

2.Remove the resistor stud (22) as instructed on page 30.

3.Check the resistance between the black resistor stud contact ring (D) and the needle contact ring

(C). See Fig. 15. You may have to press down on the contact ring (D) in several places to get a good reading.

4.The resistance should be 21 to 29 megohms. If the resistance is correct, make sure the metal contact in the gun barrel and the needle contact ring (C) are clean. If the resistance is outside the specified range, the resistor is defective and the resistor stud (22) must be replaced. See page 30 to re- place the resistor stud.

WARNING

FIRE, EXPLOSION, AND ELECTRIC

SHOCK HAZARD

The resistor stud contact ring (D) is a conductive contact ring, not a sealing o-ring. See Fig. 15. To reduce the risk of sparking, which could cause a sparking or electric shock, do not remove the resistor stud contact ring (D) or operate the gun without the contact ring in place. Do not replace the resistor stud (22) with anything but a genuine Graco part.

KEY-Fig. 15

CNeedle Contact Ring

DResistor Stud Contact Ring

22 Resistor Stud

22

D

Fig. 14

03566

C

0442

Fig. 15

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Contents 308584 INSTRUCTIONS-PARTS LIST100 psi 0.7 MPa, 7 bar Maximum Working Pressure Part No. 222700, Series CSymbols Table of ContentsWarning Symbol Caution SymbolELECTRIC SHOCK HAZARD Warnings are continued on the next page FIRE AND EXPLOSION HAZARDPRESSURIZED EQUIPMENT HAZARD TOXIC FLUID HAZARD EQUIPMENT MISUSE HAZARDSpraying Waterborne Fluids Electrostatically IntroductionOperating the Electrostatics Refer to Fig. 1, pageB A C D Inner Hose Layer EE is a PTFE tube Graco Waterborne Fluid Hose purchased separatelyD Conductive Hose Layer DD covers the PTFE tube H2O PRO Voltage Block connection shownInstalling the System InstallationVentilate the Spray Booth Warning SignsPRO 3500wb Gun shown with the Graco H2O PRO Batch System Consult your isolation system manual for other configurationsT S N K L M G F NH R B A E D P CInstall the Fluid LIne Accessories Install the Air Line AccessoriesConnect the Air Line Connect the Exhaust TubeContinued on the next page Filter the FluidConnect the Fluid Hose connection shown Connect the Fluid Hose continuedH2O PRO Voltage Block FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD Ground the SystemCheck the Electrical Grounding Operation Fluid Voltage Discharge and Grounding ProcedurePressure Relief Procedure Selecting a Fluid Nozzle and Air Cap Operating ChecklistCOMPONENT RUPTURE HAZARD Operating the Spray GunFIRE AND EXPLOSION HAZARD Fine Adjustments of the Spray Gun Atomizing Air Valve AdjustmentShutdown MaintenanceDaily Care and Cleaning Procedure Clean the Air Cap and Fluid NozzleFlush the Spray Gun Equipment neededVoltage Loss Troubleshooting TroubleshootingSpray Gun Waterborne Fluid HoseTests Voltage Loss Troubleshooting continuedProblem Electrical TroubleshootingSolution CauseSpray Pattern Troubleshooting Gun Operation Troubleshooting Poor Electrostatic Wrap TroubleshootingGun Operation Troubleshooting continued Test Gun Resistance Electrical TestsTest Resistor Stud Resistance Test Power Supply ResistancePrepare the Gun for Service ServiceAir Cap/Nozzle/Resistor Stud Replacement Tools Included with the GunInstallation Air Cap/Nozzle/Resistor Stud Replacement continuedElectrode Needle Replacement If installing the complete fluid rod assembly, go to step 11, page Preventative MaintenanceFluid Packing Rod Removal and Repair WhereFluid Packing Rod Removal and Repair continued Fluid Adjustment Assembly Repair Fan Air Adjustment Valve RepairIf installing the complete valve, go to step DETAIL Apply a very light coat of lubricant to the o-rings 41 Fluid Adjustment Assembly Repair continuedAir Trigger Valve Repair Atomizing Air Valve Repair 05363B ES ON-OFF Valve RepairMOVING PARTS HAZARD Barrel Removal Do not expose the gasket 18a to solvents Power Supply Replacement Apply a very light coat of lubricant to the o-rings 37a 05158B Turbine Alternator ReplacementBarrel Installation Measurements, inches mm Graco Waterborne Fluid Hose RepairPRO 3500sc Gun Conversion PRO 3500SC Gun DisassemblyNOTE Keep all the following parts for reassembly Installing the Fluid Needle Assembly 10. Tighten the nut 78* onto the ferrule housing See Detail A Spray Gun PartsPart No. 222700, Series C Model PRO 3500wb Spray Gun EQUIPMENT MISUSE HAZARDY Replacement Warning signs are available at no cost DescriptionUse Only Genuine Graco Parts and Accessories AccessoriesWaterborne Fluid Hose Assembly 100 psi 0.7 MPa, 7 bar Maximum Working PressureManual Change Summary For use in the Fluid Voltage Discharge and Ground- ing ProcedureSnap Ring Pliers Gun High Voltage Probe & MeterPage Data Technical DataCategory Graco Phone Number The Graco Warranty and DisclaimersWARRANTY EQUIPMENT NOT COVERED BY GRACO WARRANTY