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Graco 311322H Operation, Parts, Service And Repair

Gap pro spray gun
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Operation, Parts, Service and Repair
GAP Pro Spray Gun
For use with non-flammable polyurethane foams. 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
Important Safety Instructions
Read all warnings and instructions
in this manual. Save these instructions.
311322H

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Summary of Contents for Graco 311322H

  • Page 1 Operation, Parts, Service and Repair GAP Pro Spray Gun 311322H For use with non-flammable polyurethane foams. 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...

  • Page 2: Table Of Contents

    Daily Shutdown ......11 Graco Information ......34 Pressure Relief Procedure .

  • Page 3: Gun Models

    295559 Round Pattern Gun #02 round 295560 Round Pattern Gun #03 round 295561 Round Pattern Gun #04 round 295562 ★ Flat pattern guns are sold without a spray tip. See Flat Spray Tip Kits, page 32 for tip choices. 311322H...

  • Page 4: Warnings

    Follow Pressure Relief Procedure in this manual, when you stop spraying and before cleaning, checking, or servicing equipment. • Tighten all fluid connections before operating the equipment. • Check hoses, tubes, and couplings daily. Replace worn or damaged parts immedi- ately. 311322H...
  • Page 5 Graco/Gusmer replacement parts only. • Do not alter or modify equipment. • Use equipment only for its intended purpose. Call your Graco/Gusmer distributor for information. • Route hoses and cables away from traffic areas, sharp edges, moving parts, and hot surfaces.

  • Page 6: Overall View

    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) 311322H...
  • Page 7 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) 311322H...

  • Page 8: Operation

    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.

  • Page 9: Safety Stop

    . 3. Engage Safety Stop Manual 2. To disengage the safety stop, push in Valves and turn the safety stop knob counterclock- wise. See F . 4. Coupling Blocks . 4. Disengage Safety Stop . 5. Manual Valves 311322H...

  • Page 10: Air Hose Configurations

    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 311322H...

  • Page 11: Initial Set Up

    9. Disengage safety stop. 1. Follow Pressure Relief Procedure, page 10. Test spray on disposable surface. 2. Shutdown proportioning unit as required. 11. Proceed with Daily Start-up procedure or Shutdown procedure as required. 3. Grease gun, page 12. 311322H...

  • Page 12: Pressure Relief Procedure

    To relieve pressure in hose after gun is 5. Disconnect gun air supply, page 10. 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. 311322H...

  • Page 13: Repair

    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 311322H...
  • Page 14 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 11. full turn (max.) . 8. Tighten Check Valve Retainer 311322H...

  • Page 15: Mixing Chamber And Gun Block

    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. 311322H...
  • Page 16 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 311322H...

  • Page 17: End Cap And Air Piston

    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 311322H...
  • Page 18 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 11. Piston O-Ring . 12. Piston Assembly 311322H...

  • Page 19: End Cap O-Ring And Safety Stop Seal

    To repair side blocks, see Side Blocks, aged. Lightly coat new o-ring with page 13. Lubriplate grease and install on end cap. End Cap/Safety Stop Assembly Retaining Ring Cylinder Clamp Socket Head Cap Screw . 13. End Cap Assembly 311322H...
  • Page 20 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 11. Cup Seal End Cap O-Ring . 14. Safety Stop Assembly 311322H...

  • Page 21: Trigger/Air Valve

    19. Return gun to service. See Daily Start-Up, port at rear of gun. page 11. 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 311322H...
  • Page 22 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 311322H...

  • Page 23: Air Passage Diagrams

    .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 311322H...
  • Page 24 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 311322H...
  • Page 25 Repair Notes 311322H...

  • Page 26: Parts

    Parts Parts GAP Pro Spray Gun Assembly Round Spray Spatter Spray . 18: GAP Pro Final Assembly 311322H...
  • Page 27 16 296939 SCREEN; 80 mesh ❖ TOOL, cleanout (pack of 10) 17 296940 SCREW, screen, A-side 18 296941 SCREW, screen, R-side ❖ See Table 1 or Table 2 for part numbers by 19 296942 SEAL, screw, screen model. (pack of 2) 311322H...
  • Page 28 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. 311322H...
  • Page 29 Parts Notes 311322H...

  • Page 30: Gap Pro Spray Gun Handle Assembly

    Parts GAP Pro Spray Gun Handle Assembly . 19: GAP Pro Handle Assembly 311322H...
  • Page 31 84 296962 CYLINDER, air 65 296535 CLAMP, cylinder 85❄ 114054 O-RING 66❄ 108103 O-RING 86 295665 NIPPLE 67❄ 168518 O-RING 68 295695 SCREW, cap; button hd 69 295671 SCREW, trigger ❄ Included in Handle Seal Repair Kit 296938 (purchase separately). 311322H...

  • Page 32: Accessories

    Round Mixing Mixing Chamber Mixing Chamber Chamber (27) Chamber (27) Nozzle Cleanout Drill Port Cleanout Drill 296840 296846 118369 296289 296841 296847 296296 296293 296842 296848 296297 118369 296843 296849 296302 296296 296844 296850 296490 296297 296845 296851 296491 296302 311322H...

  • Page 33: Technical Data

    R Component (Resin) Inlet Size -6 JIC; 9/16-18 UNF Length 7 in. (17.8 cm) Height 7.25 in. (18.4 cm) Width 4.4 in. (11.2 cm) Weight 2.34 lb (1.06 kg) Wetted Parts Stainless steel, carbon steel, brass, nylon, acetal, PTFE, aluminum 311322H...

  • Page 34: 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.

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