Graco Inc PRO4000 Maintenance, Daily Care and Cleaning, Clean the Air Cap and Fluid Nozzle, 59g

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MAINTENANCE

Daily Care and Cleaning

WARNING

To reduce the risk of serious bodily injury, including splashing in the eyes or on the skin or electric shock, always follow the Pressure Relief Proce- dure Warning on page 9 when shutting off the sys- tem, when you stop spraying and before checking, servicing, installing, cleaning or changing any part in the system.

CAUTION

Clean all parts with a non±conductive solvent, compatible with the fluid being sprayed. Conductive solvents can cause the gun to malfunction.

Do not use any cleaning method which may al- low solvent into the gun air passages. Solvent left in the gun passages could result in a poor qual- ity paint finish and may draw current and reduce the electrostatic effect. Point the gun down while cleaning to prevent dirty solvent from running back into the air passages. NEVER IMMERSE THE GUN IN SOLVENT.

1.Clean the fluid and air line filters daily.

2.Clean the outside of the gun daily with a soft cloth dampened in a compatible solvent.

3.Clean the air cap and fluid nozzle daily, minimum. Some applications require more frequent cleaning. Replace the fluid nozzle and air cap if they are dam- aged. See Clean the Air Cap and Fluid Nozzle.

4.Check the electrode wire. Straighten if bent, and re- place if broken or damaged. See Electrode Needle Replacement.

5.Check all of the work hangers for build-up of material; clean them, if necessary.

Clean the Air Cap and Fluid Nozzle

CAUTION

Do not use metal tools to clean the air cap holes as this may scratch them, and make sure the elec- trode wire is not damaged. Scratches in the air cap holes or a damaged electrode wire can distort the spray pattern.

Equipment needed:

Soft bristle brush (supplied). Fluid nozzle wrench (supplied).

Solvent compatible with fluid being sprayed.

Procedure:

1.Follow the Pressure Relief Procedure Warning on page 9.

2.Remove the air cap assembly (14). See Fig 6.

3.Turn the locking pin (84) to the unlocked position.

4.Squeeze the gun trigger and remove the fluid nozzle with the fluid nozzle wrench (59g) supplied. Make sure the front of the gun is held down. See Fig 6.

5.Use the soft bristle brush (59a) supplied and solvent to clean the air cap, fluid nozzle, and front part of the gun.

6.Squeeze the gun trigger and screw the fluid nozzle back into gun. Tighten the nozzle securely with the wrench (59g) supplied. Torque the fluid nozzle to 1.1±1.4 NSm (10±12 in±lb). See Fig 6. Turn the lock- ing pin to the locked position.

7.Carefully reinstall the air cap assembly. Avoid bend- ing the electrode (12). Tighten the retaining nut so it is snug, allowing the air cap to turn with resistance. If too tight, the spray pattern will be distorted.

KEY

12Electrode

13Fluid Nozzle

14Air Cap Assembly

59g Wrench

14 12

13 Torque to 1.1±1.4 NSm (10±12 in±lb)

59g

Fig 6

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Contents Read and Retain for Reference Manual MID±RANGE ElectrostaticRev. AE Part Number 218±026, Series E Terms Table of ContentsHazardous Fluid Hazard Hose SafetyEquipment Misuse Hazard HOW the Electrostatic AIR Spray GUN Works Flushing and Cleaning SafetyVentilate the Spray Booth Fire or Explosion HazardKEY Typical InstallationNON±HAZARDOUS Area Hazardous Area Connect the Fluid Line Refer to the Typical InstallationVentilate the Spray Booth Check the Electrical Grounding See Fig Spraying Operation Operating ChecklistOperation Filter the FluidAdjust the Spray Pattern Install the Fluid Nozzle and Air CapFollow the Pressure Relief Procedure Warning on MaintenanceDaily Care and Cleaning Clean the Air Cap and Fluid NozzleFlush the Spray Gun Problem Cause Solution Improper Spray Pattern Spray Pattern Troubleshooting ChartProblem Cause Solution GUN Operation Troubleshooting ChartElectrical Troubleshooting Chart Test Gun Resistance Test Power Supply ResistanceTest Resistor Stud Resistance Electrode Replacement Gun DisassemblyResistor Stud Replacement Barrel Removal Fluid Needle Packing Replacement45c Service45d 45f3c 2 3a Power Cartridge Replacement18b Turbine Alternator Removal Air Valve Replacement Fan Air Valve ReplacementKEY81 ES ON±OFF Valve Removal & ReplacementFluid Adjusting Screw Replacement Muffler and Check Valve ReplacementIncludes items 59a±59h 59f 59e 59d 59g 59c 59b59a Ref No Power CartridgeParts Drawing Ref No 59, Tool Kit18b 186±127 Parts List218±014 HANDLE, gun Includes item 2a 179±400Repair Kits Assembly Changed Status No. Part No Name Technical DataService Information HOW to Order Replacement PartsAccessories PRO4000H GUN Electrostatic High Conductivity KIT 222±029 Filter AIR or Paint 202±271218±123 Electrostatic System 218±124 Electrostatic SystemImportant Phone Numbers Graco PRO4000 Warranty and Disclaimers