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Graco 218-745 Instructions-Parts List Manual

Automatic mid-range electrostatic air spray gun b series
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INSTRUCTIONS–PARTS LIST
307–712
Rev P
Supersedes N
This manual contains IMPORTANT
WARNINGS AND INSTRUCTIONS
READ AND RETAIN FOR REFERENCE
Model PRO 5000
AUTOMATIC MID-RANGE ELECTROSTATIC
AIR SPRAY GUN
7 bar (100 psi) MAXIMUM WORKING AIR PRESSURE
Part Number 218–745, Series B
With 1.2 mm (0.047 in.) spray nozzle and part no. 218–996 air cap assembly
U.S. Patent No. 4,290,091; 4,219,865; 4,462,061; 4,497,447; 4,660,774; 4,554,622
U.K. Patent No. 2,140,327B; 2,142,559B; 2,147,158; 2,191,423
Patented 1986, 1987 Canada
Brevete 1986, 1987
French Patent No. 84 07942; 84 10234
Italian Patent No. 1,111,380
Japanese Patent No. 86. 07416
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
COPYRIGHT 1985, GRACO INC.

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  • Page 1 INSTRUCTIONS–PARTS LIST 307–712 Rev P Supersedes N This manual contains IMPORTANT WARNINGS AND INSTRUCTIONS READ AND RETAIN FOR REFERENCE Model PRO 5000 AUTOMATIC MID-RANGE ELECTROSTATIC AIR SPRAY GUN 7 bar (100 psi) MAXIMUM WORKING AIR PRESSURE Part Number 218–745, Series B With 1.2 mm (0.047 in.) spray nozzle and part no.

  • Page 3: Table Of Contents

    Terms ........Safety Warnings .

  • Page 4: Safety Warnings

    SAFETY WARNINGS SERIOUS BODILY INJURY, EXPLOSION, FIRE, OR ELECTRIC SHOCK CAN OCCUR IF THE PRECAUTIONS BELOW ARE NOT FOLLOWED. READ AND UNDERSTAND ALL INSTRUCTION MANUALS, TAGS, AND WARNING LABELS BEFORE OPERATING EQUIPMENT. ELECTROSTATIC EQUIPMENT SHALL ONLY BE USED BY TRAINED, QUALIFIED PERSONNEL WHO SHALL BE FULLY CONVERSANT WITH THE REQUIREMENTS STATED WITHIN THIS INSTRUCTION MANUAL.

  • Page 5: How The Electrostatic Air Spray Gun Works

    FIRE OR EXPLOSION HAZARD To reduce the risk of fire, explosion, or electric shock, which may result from electrical discharge, it is essential that: All parts of the electrostatic system are properly grounded. All personnel in or close to the spray area are properly grounded. All electrically conductive objects or devices in the spray area, includ- ing paint containers, wash cans and tools, are properly grounded.

  • Page 6: Typical Installation

    Power Supply Must Be Interlocked With Spray Booth Exhaust Fan. Main Air Line NON–HAZARDOUS AREA Air Supply Shut-off Valve (bleed-type) Air & Water Separator Ball Valve Air Line Lubricator Air Regulator The Typical Installation shown above is only a guide for selecting and installing electrostatic air spray systems.

  • Page 7: Mount The Gun

    Mount the Gun Mount the gun on a stationary support or on a reciprocat- ing arm. The mounting rod must be properly grounded . Mount the gun so the front of the gun is 254 to 300 mm (10 to 12 in.) from the work piece. Connect the Air Line (Refer to the Typical Installation Drawing)

  • Page 8: Check The Electrical Grounding

    Check the Electrical Grounding WARNING Proper electrical grounding of every part of your system is essential. For your safety, read the warn- ing section, FIRE OR EXPLOSION HAZARD, on page 5. Ground the system as explained there. Then check your system as explained below. 1.

  • Page 9: Operation

    Pressure Relief Procedure To reduce the risk of serious bodily injury, including splashing in the eyes or on the skin, injury from moving parts or electric shock, always follow this procedure when shutting off the system, when checking or serv- icing any part of the spray system, when installing, cleaning or changing fluid nozzles, and whenever you stop spraying.

  • Page 10: Adjust The Spray Pattern

    Adjust the Spray Pattern Follow the steps below to establish the correct fluid flow and air flow. DO NOT turn the turbine air on yet. 1. Adjust the fluid flow for the appropriate flow rate by using the fluid pressure regulator installed in the fluid line.

  • Page 11: Maintenance

    Daily Care and Cleaning CAUTION Clean all parts with a non–conductive solvent, compatible with the fluid being sprayed. Conduc- tive 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.

  • Page 12: To Clean Or Change Air Cap And Fluid Nozzle

    To Clean or Change 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.

  • Page 13: Spray Pattern Troubleshooting Chart

    SPRAY PATTERN TROUBLESHOOTING CHART Installing and servicing this equipment requires access to parts which may cause electric shock or other serious bodily injury if the work is not performed properly. Do not install or service this equipment unless you are trained and qualified.

  • Page 14: Gun Operation Troubleshooting Chart

    GUN OPERATION TROUBLESHOOTING CHART PROBLEM CAUSE Leakage from fluid pack- Worn needle packing. ing nut. Air leakage from front Air valve not seating properly. of gun. Air stem packing too tight. Fluid leakage from Electrode worn or damaged. front of gun. Worn fluid seat.

  • Page 15: Electrical Troubleshooting Chart

    ELECTRICAL TROUBLESHOOTING CHART PROBLEM CAUSE Poor wrap–around. *Turbine alternator not operating. Improper distance between gun and workpiece. Parts poorly grounded. High booth exhaust velocity. Atomizing air pressure too high. Fluid pressure too high. Fluid viscosity. Fluid resistivity too low. Faulty gun resistance. Faulty resistor stud resistance.

  • Page 16: Electrical Tests

    The performance of the spray gun is directly affected by the condition of the electrical components contained inside the gun. The electrical tests below can be used to determine the condition of the power supply (5) and the resistor stud (17) as well as the continuity of the electrical path between the components.

  • Page 17: Test Resistor Stud Resistance

    Test Resistor Stud Resistance Insert a conductive rod (FF) into the gun barrel (removed for the power supply test) and against the metal contact (GG) in the front of the barrel. See Fig 9. Measure the resistance between the conductive rod (FF) and the gun electrode (14).

  • Page 18: Service

    Gun Disassembly WARNING Installing and servicing this equipment requires access to parts which may cause electric shock or other serious bodily injury if the work is not per- formed properly. Do not install or service this equipment unless you are trained and qualified. Follow the Pressure Relief Procedure Warning, page 9, before servicing the gun or any part of the system.

  • Page 19: Resistor Stud Replacement

    Resistor Stud Replacement WARNING Old/New Style Resistor Stud and Electrode To reduce the risk of sparking, which could cause fire or explosion, BE SURE the electrode and stud you install are black. The old style electrode and stud in the Series A Guns were white. DO NOT mix old style parts with new style parts.

  • Page 20: Barrel Removal

    Barrel Removal 1. Unscrew the nut (34) at the gun’s fluid inlet adapter (35). See the PARTS DRAWING. 2. Pull the fluid tube (31) out of the fluid adapter (35). 3. Remove the trigger by removing the screws and spacers from the gun. 4.

  • Page 27: Parts List

    PART NO. DESCRIPTION 218–744 BODY, gun 218–111 POWER CARTRIDGE Includes items 2a & 5 217–591 .ALTERNATOR, turbine Includes items 2b & 2c 107–106 ..O–RING; buna–N 180–070 ..PLUG 107–107 REGULATOR, disc 110–916 SCREW; 1/4–20 218–041 .POWER SUPPLY, ES, 75 KV Includes items 5a, 5b & 5c 177–156 ..O–RING;...

  • Page 28: Kits

    Use only GENUINE GRACO PARTS AND ACCESSORIES. When servicing use only genuine Graco replace- ment parts. Use of other parts or any alteration or modification of this equipment could result in serious injury, fire, explosion, or property damage. NOTE: The Ref. Nos. shown in the kits below correspond to the reference numbers used in the parts list on page 27. For the best results, use all the parts in the kit, even if the old parts still look good.

  • Page 29: Technical Data

    TECHNICAL DATA Weight ......Gun Length ..... Maximum Working Pressure .

  • Page 30: Accessories

    Use only GENUINE GRACO PARTS AND ACCESSORIES. NEVER operate your equipment at a working pressure rating that is higher than the lowest rated component in your system. Lower rated components may not be able to withstand the pressure developed by the pump and may rupture, causing serious bodily injury or property damage.
  • Page 31 FILTER (AIR OR PAINT) 202–271 52 bar (750 psi)MAXIMUM WORKING PRESSURE With 250 micron (60 mesh) element, 3/8 npt(f) inlet, 3/8 npt(m) outlet SPRAY SYSTEM ACCESSORIES ELECTROSTATIC SYSTEM 231–035 Includes items: 218–745 Automatic Electrostatic Air Spray Gun 218–101 Grounded Air Supply Hose (See page 30 for description) 216–076 Fluid Hose (See page 30 for descrip-...

  • Page 32: Warranty

    THE GRACO WARRANTY AND DISCLAIMERS WARRANTY Graco warrants all equipment manufactured by it and bearing its name to be free from defects in material and work- manship on the date of sale by an authorized Graco distributor to the original purchaser for use. As purchaser’s sole remedy for breach of this warranty, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment proven defective.

This manual is also suitable for:

307-712Pro 5000B series

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