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Operation, Parts, Service and Repair GAP Pro Spray Gun 311322L For use with non-flammable polyurethane foams. For professional use only. Not for use in explosive atmospheres. See page 3 for model information. 3000 psi (20.7 MPa, 207 bar) Maximum Working Fluid Pressure 125 psi (0.86 MPa, 8.6 bar) Maximum Working Air Pressure...
Do not stop or deflect leaks with your hand, body, glove, or rag. • Do not spray without tip guard and trigger guard installed. • Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning, checking, or servicing equipment. 311322L...
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Graco/Gusmer replacement parts only. • Do not alter or modify equipment. • Use equipment only for its intended purpose. Call your Graco/Gusmer distributor for infor- mation. • Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot sur- faces.
Posting a placard such as the following outside the work area is recommended: TOXIC FUMES HAZARD DO NOT ENTER DURING SPRAY FOAM APPLICATION OR FOR ___ HOURS AFTER APPLICATION IS COMPLETE DO NOT ENTER UNTIL: DATE: ____________ TIME: ____________ 311322L...
NOTE: The amount of film formation and rate of crystallization varies depending on the blend of ISO, the humidity, and the temperature. Some materials may become self-igniting if applied too thick. Read material manufacturer’s warnings and Safety Data Sheet (SDS). 311322L...
• When changing between epoxies and urethanes or polyureas, disassemble and clean all fluid com- ponents and change hoses. Epoxies often have amines on the B (hardener) side. Polyureas often have amines on the B (resin) side. 311322L...
Overall View Overall View Major Components Safety Stop A-Manual Valve A-Screen Screw R-Manual Valve Spray Tip R-Screen Screw Trigger . 1. Major Components (shown with round spray tip) 311322L...
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Overall View O-Ring R-Side Block Mixing Chamber Gun Block Air Cap Flat Tip Side Block Screws Gun Block Air Seal Screws A-Side Block . 2. Front End Components (shown with flat spray tip assembly) 311322L...
Check your local electrical code and propor- tioner manual for detailed grounding instruc- Isocyanate Hazard tions. Ground the spray gun through connection to a Graco-approved grounded fluid supply hose. Spraying materials containing isocyanates creates potentially harmful mists, vapors, and atomized particulates. Read material manufacturer’s warnings and material MSDS to know specific hazards and precautions related to isocyanates.
6. Connect air hose to nipple and use wrench ual valves, and disconnect air before chang- to tighten. ing air hose configuration. Install Pipe Nipple Air Hose Remove Pipe Plug Install Pipe Plug Remove Long Pipe Nipple . 6. Air Hose Configuration 311322L...
To relieve pressure in hose after gun is 5. Disconnect gun air supply, page 13. removed, place fluid manifold over containers, facing away from you. Very carefully open fluid valves. Under high pressure, fluid will spray sideways from fluid ports. 311322L...
A-side block. 1. Follow Pressure Relief Procedure, page Manual Valve Assembly Side Block Screen Screw Seal Check Valve Assembly Spring Check Valve Retainer Side Seal O-Ring Screen Screw Screen Side Seal Assembly Swivel Fitting . 7. Side Block Components 311322L...
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15. Install side blocks to gun body with two mounting screws. Tighten screws alter- nately and evenly to prevent leakage. 16. Return gun to service. See Daily Start-Up, One quarter of a page 14. full turn (max.) . 8. Tighten Check Valve Retainer 311322L...
Clean mixing chamber with gun cleaner and drill bits. Inspect for damage and replace if neces- sary. 7. Hold end of piston shaft with a 3/16 in. wrench or needle-nose pliers. Screw mix- ing chamber onto shaft by hand. 311322L...
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Repair O-Ring R-Side Block Mixing Chamber Gun Block Air Cap Flat Tip Side Block Gun Block Screws Air Seal Screws A-Side Block . 10. Mixing Chamber and Gun Block 311322L...
Be sure to retain o-ring located between gun block and mounting flange. Piston Assembly Piston Spring Mixing Chamber End Cap/Safety Stop Assembly Socket Head Cap Screw Cylinder Retaining Ring Clamp . 11. End Cap and Piston Assembly 311322L...
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19. Install side blocks to gun body with two mounting screws. Tighten screws alter- nately and evenly to prevent leakage. Piston Shaft O-Rings 20. Return gun to service. See Daily Start-Up, Piston page 14. Piston O-Ring . 12. Piston Assembly 311322L...
To repair side blocks, see Side Blocks, aged. Lightly coat new o-ring with Lubri- page 16. plate grease and install on end cap. End Cap/Safety Stop Assembly Retaining Ring Cylinder Clamp Socket Head Cap Screw . 13. End Cap Assembly 311322L...
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12. Install side blocks to gun body with two mounting screws. Tighten screws alter- Stop Pin nately and evenly to prevent leakage. Set Screws 13. Return gun to service. See Daily Start-Up, page 14. Cup Seal End Cap O-Ring . 14. Safety Stop Assembly 311322L...
19. Return gun to service. See Daily Start-Up, port at rear of gun. page 14. 9. Brass spring seat is visible inside port at rear of gun. Use a 1/4 in. diameter (maxi- mum) punch and hammer to gently tap 311322L...
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Repair Optional Air Hose and Nipple 1/8 in. Pipe Plug Spring 1/16 in. Seat Pipe Plug Valve Liner O-Rings Valve Spool Valve Spring Trigger Mounting Screw Lock Nut Valve Retainer Nut Trigger Lever . 15. Trigger/Air Valve Assembly 311322L...
.3125 dia. .250 dia. .375 dia. 1.858 dia. .687 dia. 1.750 dia. .3125 dia. 8-32 UNC-GH3 TAP 1/8 in. drill 1/8 in. drill 5/32 in. drill 8-32 UNC-2B TAP . 16: Air Cylinder Air Passages 311322L...
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10-32 UNC-2B TAP 5/32 in. drill (3) 10-32 UNC-2B TAP 5/32 in. drill 1/8 in. NPT TAP 1/2 in. dia. 1/16 in. NPT TAP 5/8-18 UNC-2B TAP 5/32 in. drill 1/8 in. drill 1/8 NPT TAP . 17: Handle Air Passages 311322L...
Parts Parts GAP Pro Spray Gun Assembly Round Spray 3, 42 . 18: GAP Pro Final Assembly 311322L...
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296297 296302 296490 ◆ This model uses qty. 2 each of items 1 and 2. ✖ Kit includes qty. 2 each of items 23 and 26. † Kit includes (1) 27, (1) 28, and cleanout tools 40 and 41. 311322L...
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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