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INSTRUCTIONS-PARTS LIST
This manual contains important
warnings and information.
READ AND KEEP FOR REFERENCE.
INSTRUCTIONS
Model PRO 3500sct
Electrostatic Air Spray Gun
65 kV, MANUAL GUN
100 psi (7 bar, 0.7 MPa) Maximum Working Pressure
Part No. 222300, Series B
With Two-Finger Trigger
Part No. 222600, Series B
With Four-Finger Trigger
NOTE: Any modification of genuine Graco parts or replacement of parts with non-Graco parts will void agency approvals.
U.S. PATENT NO. 4,290,091; 4,219,865; 4,497,447; 4,462,061; 4,660,774 ; D313,064; 4,978,075
Patented 1986, 1987 Canada
Brevete 1986, 1987
U.K. PATENT NO. 2,147,158; 2,142,559B; 2,140,327B
French Patent No. 89 16305
Other U.S. and Foreign Patents Pending
GRACO INC. P.O. BOX 1441 MINNEAPOLIS, MN 55440–1441
Part No. 222300 shown
ECOPYRIGHT 1989, GRACO INC.
Graco Inc. is registered to I.S. EN ISO 9001
307912
Rev. AC
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Table of Contents
Troubleshooting
Related Manuals for Graco 222300
Summary of Contents for Graco 222300
- Page 1 Model PRO 3500sct Electrostatic Air Spray Gun 65 kV, MANUAL GUN 100 psi (7 bar, 0.7 MPa) Maximum Working Pressure Part No. 222300, Series B With Two-Finger Trigger Part No. 222600, Series B With Four-Finger Trigger NOTE: Any modification of genuine Graco parts or replacement of parts with non-Graco parts will void agency approvals.
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Page 2: Table Of Contents
Symbols ........Warnings . -
Page 3: Warnings
FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD Improper grounding, poor air ventilation, open flames, or sparks can cause a hazardous condition and result in a fire, explosion, or electric shock. D Electrostatic equipment must be used only by trained, qualified personnel who understand the requirements stated in this instruction manual. - Page 4 PRESSURIZED EQUIPMENT HAZARD Spray from the gun, hose leaks, or ruptured components can splash fluid in the eyes or on the skin and cause a serious injury. D Do not point the spray gun at anyone or any part of the body. D Do not stop or deflect fluid leaks with your hand, body, glove, or rag.
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Page 5: Introduction
How the Electrostatic Air Spray Gun Works The air hose supplies air to the spray gun. Part of the air operates the turbine and the rest of the air atomizes the fluid being sprayed. The turbine generates power, which is converted by the power cartridge, to supply high voltage current to the gun’s ionizing electrode. -
Page 6: Non-Hazardous Area
Main Air Supply Line B* Ventilation Fan Interlock Solenoid Valve C* Main Air Supply Shutoff Valve (bleed-type) Air & Water Separator E* Pump Air Supply Shutoff Valve (bleed-type) Air Line Lubricator G Air Pressure Regulator Pump J* Pump Ground Wire Fluid Filter Fluid Supply Line Shutoff Valve M Fluid Pressure Regulator... -
Page 7: Connect The Air Line
Connect the Air Line (Refer to Fig. 1) WARNING ELECTRIC SHOCK HAZARD To reduce the risk of an electric shock or other serious injury, the air supply hose must be electrically connected to a true earth ground. Use Only Graco Electrically Con- ductive Air Supply Hose. -
Page 8: Ground The System
Ground the System WARNING FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD When operating the electrostatic device, any ungrounded objects in the spray area (such as people, containers, tools, etc.) can become electrically charged. Improper grounding can result in static sparking, which can cause a fire, explo- sion, or electric shock. -
Page 9: Check The Electrical Grounding
Check the Electrical Grounding (See Fig. 2) WARNING FIRE, EXPLOSION, AND ELECTRIC SHOCK HAZARD Megohmmeter P/N 241079 (AA-see Fig. 2) is not approved for use in a hazard- ous area. To reduce the risk of sparking, do not use the megohmmeter to check electrical grounding unless: D The gun has been removed from the hazardous area;... - Page 10 Notes 307912...
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Page 11: Operation
Pressure Relief Procedure WARNING PRESSURIZED EQUIPMENT HAZARD The system pressure must be manually relieved to prevent the system from starting or spraying acci- dentally. To reduce the risk of an injury from electric shock, accidental spray from the gun, splashing fluid, or moving parts, follow the Pressure Relief Procedure whenever you: D are instructed to relieve the pressure,... -
Page 12: Selecting A Fluid Nozzle And Air Cap
Fig. 4 Selecting a Fluid Nozzle and Air Cap WARNING PRESSURIZED EQUIPMENT HAZARD To reduce the risk of an injury, follow the Pressure Relief Procedure on page 11 before removing or installing a fluid nozzle and/or air cap. The gun is supplied with a 0.059 in. (1.5 mm) fluid nozzle, P/N 185158, and air cap, P/N 193033. - Page 13 Operating the Spray Gun (continued) 1. Follow the Operating Checklist on page 11. 2. To adjust the air cap for a vertical or horizontal spray pattern, first make sure the pressure is relieved. Then loosen the air cap retaining nut, and rotate the air cap as directed in Fig.
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Page 14: Shutdown
Shutdown WARNING PRESSURIZED EQUIPMENT HAZARD To reduce the risk of an injury, follow the Pressure Relief Procedure on page 11 whenever you stop spraying and whenever you are instructed to relieve pressure. Daily Care and Cleaning WARNING PRESSURIZED EQUIPMENT HAZARD To reduce the risk of an injury, follow the Pressure Relief Procedure on page 11 when you stop spraying, before cleaning or flushing the spray gun,... -
Page 15: Clean The Air Cap And Fluid Nozzle
Clean the Air Cap and Fluid Nozzle CAUTION Do not use metal tools to clean the air cap or spray nozzle holes as this could scratch them, and make sure the electrode wire is not damaged. Scratches in the air cap or spray nozzle or a damaged electrode wire can distort the spray pattern. -
Page 16: Troubleshooting
WARNING ELECTRIC SHOCK HAZARD Installing and servicing this equipment requires access to parts which may cause an electric shock or other serious injury if the work is not performed properly. Do not install or service this equipment unless you are trained and qualified. -
Page 17: Gun Operation Troubleshooting
Gun Operation Troubleshooting Problem Fluid leakage from the fluid packing area Air leakage from the front of the gun Fluid leakage from the front of the gun The needle is worn or damaged. “Orange Peel” finish Excessive spray fog No fluid sprays from the gun The equipment is covered with fluid The air cap is dirty Troubleshooting... -
Page 18: Electrical Troubleshooting
Electrical Troubleshooting Problem Cause Poor wrap-around The ES ON-OFF lever is in the OFF (O) position.* The distance between the gun and work- piece is incorrect. The parts are poorly grounded. The booth exhaust velocity is too high. The atomizing air pressure is too high. The fluid pressure is too high. -
Page 19: Electrical Tests
The performance and safety of the spray gun are 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 (18) and the resistor stud (22) as well as the continuity of the electrical path between the components. -
Page 20: Test Power Supply Resistance
Test Power Supply Resistance Remove the power cartridge (18) from the gun handle. See Power Cartridge Replacement on page 27. Remove the turbine alternator from the power car- tridge. See Turbine Alternator Removal on page 28. Measure the resistance from the power supply’s ground contact point (EE) to the contact spring (18c) on the other end of the power supply. - Page 21 Test Resistor Stud Resistance (continued) If the resistance is outside the specified range, remove the resistor stud (22). See Air Cap/Nozzle/Resistor Stud Replacement on page 22. Check the resistance between the black resistor stud contact ring (D) and the needle contact ring (E). Refer to Fig. 10. You may have to press down on the contact ring (D) in several places to get a good reading.
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Page 22: Service
Prepare the Gun for Service WARNING ELECTRIC SHOCK HAZARD Installing and servicing this equipment requires access to parts which may cause an electric shock or other serious injury if the work is not performed properly. Do not install or service this equipment unless you are trained and qualified. -
Page 23: Electrode Replacement
Air Cap/Nozzle/Resistor Stud Replacement (continued) 6. Trigger the gun while installing the fluid nozzle (21) and resistor stud (22) assembly with the multi-tool (62). Tighten until the fluid nozzle seats in the gun barrel. 7. Install the air cap assembly (1, 2, 8). Test the gun resistance as instructed on page 19. -
Page 24: Barrel Removal
Barrel Removal 1. Prepare the gun for service as instructed on page 2. Carefully loosen the nut from the fluid fitting (10). Pull the tube (12) out of the fitting. Make sure both ferrules and the nut stay with the tube. See Fig. 3. -
Page 25: Fluid Packing Removal
Fluid Packing Removal 1. Prepare the gun for service as instructed on page 2. Remove the air cap assembly, fluid nozzle and resistor stud and electrode as instructed on page 3. Loosen the trigger screws (4) far enough to remove the trigger (13). 4. -
Page 26: Fluid Packing And Needle Repair
Fluid Packing and Needle Repair The fluid packings and needle can be replaced as individual parts or as assemblies. The overall assem- bly is pre-adjusted at the factory. NOTE: Before installing the packing and needle as- sembly into the gun barrel, make sure the internal surfaces of the barrel are clean. -
Page 27: Power Cartridge Replacement
Apply a very light coat of lubricant Do not expose to solvents Fig. 18 Power Cartridge Replacement NOTE: The power cartridge consists of the alternator (37), power supply (18) and retaining ring (35). See Fig. 18. 1. Prepare the gun for service as instructed on page 2. -
Page 28: Turbine Alternator Replacement
Turbine Alternator Replacement NOTE: Replace turbine bearings after 2,000 hours of operation. See your authorized Graco representative. 1. Prepare the gun for service as instructed on page 2. Remove the power cartridge from the gun handle as instructed on page 27. 3. -
Page 29: Fan Air Adjustment Valve Repair
Fan Air Adjustment Valve Repair 1. Prepare the gun for service as instructed on page 2. Place a wrench on the flats of the valve housing and remove it from the handle. See Fig. 20. NOTE: The fan air valve (43) can be replaced as an assembly or as individual parts. -
Page 30: Fluid Adjustment Assembly Repair
Fluid Adjustment Assembly Repair 1. Prepare the gun for service as instructed on page 2. Using a 14 mm socket wrench, remove the fluid adjustment assembly (45). See Fig. 21. 3. Turn the stem (45a) fully clockwise and remove the sleeve stop (45e). 4. -
Page 31: Air Trigger Valve Repair
Air Trigger Valve Repair 1. Prepare the gun for service as instructed on page 2. Using a 14 mm socket wrench, remove the fluid adjustment assembly (45), o-ring (23) and spring (44). See Fig. 21. CAUTION Clean all parts in non-conductive solvent compatible with the fluid being used, such as xylol or mineral spirits. -
Page 32: Es On-Off Valve Repair
ES ON-OFF Valve Repair 1. Prepare the gun for service as instructed on page 2. Loosen the set screw (24) with the 2 mm hex key (69) provided. Remove the lever (26) from the valve. See Fig. 23. WARNING MOVING PARTS HAZARD To reduce the risk of eye injury, be sure to wear safety glasses when removing or installing the retaining ring (47) as the... - Page 33 Notes 307912...
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Page 34: Parts
DETAIL A 28d* 28g* 28f* 28h* 28e* REF. 12 307912 Parts See Detail A 18b{ 18a{ 43e{ Item 18 includes items 18a to 18f Item 28 includes items 28a to 28h Item 37 includes items 37a and 37b Item 43 includes items 43b to 43e Item 45 includes items 45a to 45e MODEL 222600 37a{... - Page 35 Part No. 222300 , Series B Electrostatic Air Spray Gun, with two-finger trigger Part No. 222600 Electrostatic Air Spray Gun Electrostatic Air Spray Gun, with four-finger trigger Part No.
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Page 36: Accessories
Use Only Genuine Graco Parts and Accessories AIR LINE ACCESSORIES Conductive Air Supply Hose; black 100 psi (7 bar, 0.7 MPa) Maximum Working Pressure FM Approved; Color coded black; 0.315 in. (8 mm) ID; 1/4 npsm(f) x 1/4 npsm(f) left-hand thread 220444 6 ft (1.8 m) 218100... - Page 37 For turning fluid off or on to the gun and for relieving fluid line pressure at the pump 208630 1/2 npt(m) x 3/8 npt(f); carbon steel and PTFE; for non-corrosive fluids Accessories SPRAY SYSTEM ACCESSORIES Electrostatic System 223106 Includes: 222300 223070 216076 106148 Electrostatic System 223027 Includes: 222300 223070 206199...
- Page 38 Use Only Genuine Graco Parts and Accessories MISCELLANEOUS ACCESSORIES Snap Ring Pliers 110090 For removing the ES ON-OFF Valve Retaining Ring (item 47 in Parts List). Paint Resistance Meter 722886 Used with 722860 Paint Probe to measure resistance of paint. Not for use in Hazardous areas. Paint Probe 722860 Used with 722886 Paint Resistance Meter to measure resistance of paint.
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Page 39: Technical Data
Category Data Gun Weight 1.87 lb (0.85 Kg) Gun Length 9.5 in. (240 mm) Maximum Working 100 psi (7 bar, 0.7 MPa) Pressure Air Pressure 0–100 psi (0–7 bar, Operating Range 0–0.7 MPa) Fluid Pressure 0–100 psi (0–7 bar, Operating Range 0–0.7 MPa) Voltage Output 0–65 kV... -
Page 40: Graco Standard Warranty
Graco Standard Warranty Graco warrants all equipment manufactured by Graco and bearing its name to be free from defects in material and workmanship on the date of sale by an authorized Graco distributor to the original purchaser for use. With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.
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