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Related Manuals for Graco 255828
Summary of Contents for Graco 255828
- Page 1 AR Pour Gun 312888D For use with non-flammable polyurethane foams. Not for use in explosive atmospheres. Part No. 255828 2000 psi (13.8 MPa, 138 bar) Maximum Working Pressure Important Safety Instructions Read all warnings and instructions in this manual. Save these instructions.
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Page 2: Table Of Contents
Graco Standard Warranty ....32 Graco Information ......32... -
Page 3: Warnings
Warnings Warnings The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama- tion point symbol alerts you to a general warning and the hazard symbol refers to procedure-specific risk. Refer back to these warnings. Additional, product-specific warnings may be found throughout the body of this manual where applicable. - Page 4 • Ground equipment, personnel, object being sprayed, and conductive objects in work area. See Grounding instructions. • Use only Graco grounded hoses. • Check gun resistance daily. • If there is static sparking or you feel a shock, stop operation immediately. Do not use equipment until you identify and correct the problem.
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Page 5: Isocyanate Hazard
Isocyanate Hazard Isocyanate Hazard • Keep the ISO lube pump reservoir (if installed) filled with Graco Throat Seal Liquid (TSL), Part 206995. The lubricant creates a barrier between the ISO and the atmosphere. • Use moisture-proof hoses specifically designed for Spraying materials containing isocyanates creates ISO, such as those supplied with your system. -
Page 6: Components
Components Components Overall View Gun Block Key: Manual Valves Gun Block Gun Block Resin Seal Retainer Coupling Block Spacer Trigger Resin Seal Screw Valving Rod O-ring Piston Rod W Resin Packing G Safety Stop A-Port Closure Screw Pattern Control Tip Gun Block Screen Front Packing Gun Block Screen Screw... -
Page 7: Operation Basics
To engage safety stop, push in and turn clockwise to Ground the spray gun through connection to a CLOSED (rear detent) position, then release. Graco-approved grounded fluid supply hose. Disengage Safety Stop To disengage safety stop, push in and turn counterclock- wise to place in OPEN (forward detent) position, then release. -
Page 8: Air Hose Connection
Operation Basics Air Hose Connection 1. Open manual valves using 5/16 in. nut driver; turn manual valves counterclockwise approximately three full turns. Do not open until it bottoms out. Connect Air Hoses 2. Close manual valves by turning fully clockwise. Pull back sleeve of female fitting, insert male fitting and slide sleeve forward to secure connection. - Page 9 Operation Basics 7. Cover exposed openings with grease. Coupling Block Install Coupling Block Replace nicked, damaged, or worn coupling block gas- kets. 1. With gaskets in place, fit coupling block to gun block. 2. Insert coupling block mounting screw and use 5/16 in.
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Page 10: Initial Set Up
Initial Set Up Initial Set Up 1. Remove coupling block from gun. 2. Check valving rod clearance in closed position. Rod should extend approximately 1/32 in. (1 mm) beyond tip of mixing chamber. 3. Adjust valving rod travel to initial setting. See Valv- ing Rod and Resilient Sleeve, page 17. -
Page 11: Daily Start-Up
Daily Start-Up Daily Start-Up Daily Shutdown Ensure gun is attached to coupling block and air hose, and the proportioning unit is at desired temperature Follow daily shutdown when gun is out of service and pressure. for any length of time. Daily disassembly of gun for cleaning is not recommended if it has been operat- ing properly. -
Page 12: Pressure Relief Procedure
Pressure Relief Procedure Pressure Relief Procedure Relieve pressure before cleaning or repairing gun. 1. Close both manual valves. Manual Valves 2. Set safety stop to OPEN. 3. Trigger gun onto cardboard or into waste container to relieve pressure. 4. Release gun trigger, set safety stop to SERVICE (CLOSED), and close manual valves. -
Page 13: Maintenance
Maintenance Maintenance Gun Service Kits Daily Cleaning Procedure, with Gun Service Kit Use either the 1-Quart Gun Service Kit (296980) or 3-Gallon Gun Service Kit (296981) to perform daily flushing of spray gun without disassembly. To avoid static sparking that may result in fire or explo- sion, ensure all equipment in cleaning procedure is grounded. -
Page 14: Daily Cleaning Procedure, Without Gun Service Kit
Maintenance Daily Cleaning Procedure, Flush Gun without Gun Service Kit If the Gun Service Kit is not available, the iso side com- ponents must be cleaned daily. To avoid static sparking that may result in fire or explo- sion, ensure all equipment in flushing procedure is See AR Gun Tool Kit 253728 on page 28. -
Page 15: Troubleshooting
Troubleshooting Troubleshooting Problem Cause Solution Interruption of flow of one material Running out of material Supply more material to proportioner Materials in proportioner are too vis- Check with material supplier for rec- cous ommended temperature range that Change of color in mixed product should be maintained to control vis- cosity. -
Page 16: Repair
Repair Repair 3. Remove front impinger from front packing. It is not necessary to remove front packing if no damage to packing is evident or suspected. Front Impinger CAUTION Shutdown proportioner and allow chemicals to cool Front Packing before servicing gun. Clean A and R components in separate containers to avoid cross contamination. -
Page 17: Screen Screw And Port Closure Plugs
Repair 3. Slide screen screw assembly out of gun block. Allow 2. Remove spring retainer case by grasping handle excess Isocyanate material to drain. firmly and pushing in on retainer case with palm of hand. Simultaneously rotate case a quarter turn counterclockwise to remove case from locking col- lar. -
Page 18: Coupling Block And Check Valves
Repair Reassembly Coupling Block and Check Valves 1. If valving rod resilient sleeve assembly was removed or is being replaced, use the following steps: Disassembly a. Thread coupler onto resilient sleeve assembly by hand as far as it will go toward sleeve. There 1. -
Page 19: Impingers
Repair 7. If material buildup prevents easy removal, use Impingers three-pronged end of check valve removal tool to grasp check valve and turn free. Disassembly and Cleaning Opposite end of check valve removal tool is 1. Follow Pressure Relief Procedure, page 12. designed to clean check valve cavity. -
Page 20: Gun Block
Repair 2. Thread throat assembly by hand into gun block. Use Gun Block throat wrench to tighten. In severe cases of material buildup, it may be necessary to remove the gun block and soak it in gun cleaner. Front impinger should contact throat surface about 1/2 to 3/4 turns from actual seating of throat to gun 1. -
Page 21: Pressure Check Valving Rod Resilient Sleeve
Repair 7. Soak gun block in gun cleaner. 6. Set safety stop to SERVICE (CLOSED), and then pull trigger to determine if weepage occurs in this CAUTION position. Do not allow gun block or component parts to soak in gun cleaner for extended periods of time, such as overnight, as certain solvents may cause corrosion or pitting. - Page 22 Repair 312888D...
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Page 23: Parts
Parts Parts AR Pour Gun 255828 Impinger Options Impinger (C Size) Front Rear Orifice Area Part Style Part Style Factor 299974 23-B-1 299990 23-B-1 299975 33-B-1 None 33-B-1 1200 299976 33-C-1 299991 33-C-1 1800 299977 34-C-1 299992 34-C-1 2400 299980... - Page 24 Parts Auto AR-C Gun 255827 312888D...
- Page 25 Parts Part Description Part Description 299969 COUPLING, connecting 1† 296621 SEAL, screw, screen 297314 O-RING, fluoroelastomer 2† 296622 SCREEN, block, gun 299970 STOP, notched 3† 295595 RING, retaining 111603 PACKING, o-ring 4† 295175 SCREW, screen, gun block 296137 PACKING, front 296128 GASKET, block, gasket 296138...
- Page 26 Parts Gun Handle Assembly 256213 312888D...
- Page 27 Parts Part Description Part Description 299933 INSULATOR, circuit board 298116 SCREW, 4-40 x 3/4 shcs 256214 WIRE, gun harness assy 108195 PACKING, o-ring 299936 MANIFOLD, air C19950 SCREW, cap, sch 299937 SCREW, 2-56 x 7/16 phms 296066 O-RING, piston, pump 299938 COVER 106555...
- Page 28 Parts Coupling Block Assembly 285771 Part Description 295619 SCREW, mounting 295693 PLUG, pipe (285771 only) VALVE, manual BLOCK, coupling 117506 FITTING, swivel, 1/4 npt x #6 117595 FITTING, swivel, 1/4 npt x #5 AR Gun Tool Kit 253728 Part Description 117642 TOOL, nut driver 117661 PIN, vise 118665 TUBE, grease, 4 oz...
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Page 29: Ar-D Conversion Kit 24A023
Parts AR-D Conversion Kit 24A023 See Repair section on page 16 for conversion kit parts installation. Part Description 299961 CYLINDER, air assy (AR-D) 297141 SLEEVE, AR-D (375) 299968 SPRING, die, heavy duty, medium 285755 SEAL, 375 resin retainer 285756 SEAL, 375 resin screw 297143 PACKING 299989 NOZZLE, 375 throat 297142 PACKING, front... -
Page 30: Electrical Diagram
Electrical Diagram Electrical Diagram ti12351a 312888D... -
Page 31: Technical Data
Technical Data Technical Data Category Data Maximum Fluid Working Pressure 2000 psi (13.8 MPa, 138 bar) Minimum Air Inlet Pressure 90 psi (0.62 MPa, 6.2 bar) Maximum Air Inlet Pressure 120 psi (0.84 MPa, 8.4 bar) Maximum Output (flow rate) † 40 lb/min (18.1 kg/min) Air Inlet Size 1/4 npt, quick disconnect nipple... -
Page 32: Graco Standard Warranty
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.