Graco GX-7A Instructions Manual
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Graco GX-7A Instructions Manual

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Instructions
™
GX-7A
, GX-7
Spray Guns
For the application of non-flammable polyurethane foams, two-component coating
systems (polyureas), and some two-component epoxy systems. For professional use only.
See page 3 for model information.
3500 psi (24 MPa, 240 bar) Maximum Fluid Working Pressure
125 psi (0.86 MPa, 8.6 bar) Maximum Air Working Pressure
Important Safety Instructions
Read all warnings and instructions in this
manual before using the equipment.
Save these instructions.
Important Medical Information
Read the medical alert card provided with
the gun. It contains injection injury
treatment information for a doctor. Keep it
with you when operating the equipment.
GX-7A
®
DI, and GX-7 400
GX-7A DI
311321V
EN
GX-7 400

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Summary of Contents for Graco GX-7A

  • Page 1 Save these instructions. Important Medical Information Read the medical alert card provided with the gun. It contains injection injury treatment information for a doctor. Keep it with you when operating the equipment. GX-7 400 GX-7A GX-7A DI...

  • Page 2: Table Of Contents

    Install Mixing Module ..... 32 Model GX-7A ......8 Clean Pattern Control Disc .

  • Page 3: Models

    GX-7A - 10/210 296906 (10) 296704 (210) 295544 GX-7A - 3/70 296226 (3) 296710 (70) 295545 GX-7A - 5/70 296923 (5) 296710 (70) 25E217 GX-7A - A3 Slabjacking 296876 (A3) Not included 25F046 GX-7A-A3 Slabjacking OEM 296566 (A3) Not Included 311321V...

  • Page 4: Warnings

    Warnings Warnings The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclamation point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this manual where applicable.
  • Page 5 Warnings WARNING FIRE AND EXPLOSION HAZARD Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. Paint or solvent flowing through the equipment can cause static sparking. To help prevent fire and explosion: • Use equipment only in well-ventilated area. •...

  • Page 6: Important Isocyanate (Iso) Information

    Important Isocyanate (ISO) Information Important Isocyanate (ISO) Information Isocyanates (ISO) are catalysts used in two component materials. Isocyanate Conditions Spraying or dispensing fluids that contain isocyanates creates potentially harmful mists, vapors, and atomized particulates. • Read and understand the fluid manufacturer’s warnings and Safety Data Sheets (SDSs) to know specific hazards and precautions related to isocyanates.

  • Page 7: Material Self-Ignition

    Important Isocyanate (ISO) Information Material Self-Ignition NOTICE Partially cured ISO will reduce performance and the life of all wetted parts. • Always use a sealed container with a desiccant dryer in the vent, or a nitrogen atmosphere. Never Some materials may become self-igniting if applied store ISO in an open container.

  • Page 8: Component Identification

    Component Identification Component Identification Model GX-7A Rear Packing Nut Forward Stop Locknut Valving Rod Forward Stop Gun Block Air Cap Adjustment Valve Manual Valve Safety Lock Trigger 311321V...

  • Page 9: Model Gx-7 Di

    Component Identification Model GX-7 DI Coupling Block Gun Block Piston Rod Manual Valve Air Cap Trigger Valving Rod Air Cap Adjustment Valve Lock Nut Safety Lock 311321V...

  • Page 10: Model Gx-7 400

    Component Identification Model GX-7 400 Valving Rod Forward Stop Forward Stop Locknut Air Cap Adjustment Valve Gun Block Safety Lock Trigger Rear Packing Nut 311321V...

  • Page 11: Centerline Components

    Component Identification Centerline Components Model GX-7A Check Valve Gun Block Coupling Block Gasket Valving Rod Front Packing Air Cap ZAC Pattern Control Disc (PCD) Rear Packing ZAD PCD Retainer Rear Seal Retainer PCD Body Rear Packing Retainer ZAG O-ring Screen...
  • Page 12 Component Identification Model GX-7 DI ZAD PCD Retainer Gun Block A-Screen Screw Air Cap ZAH Mixing Module Rear Packing ZAM Mixing Module Retainer Screen ZAN Rear Seal Gland Check Valve Rear Seal Retainer Assembly Coupling Block Gasket ZAR Coupling Block Mounting Screw ZAC Pattern Control Disc (PCD) 311321V...
  • Page 13 Component Identification Model GX-7 400 Check Valve Gun Block Coupling Block Gasket Air Cap ZAC Pattern Control Disc (PCD) Valving Rod ZAD PCD Retainer Rear Packing ZAH Mixing Module Rear Seal Retainer A-Screen Screw Rear Packing Retainer ZAR Coupling Block Mounting Screw Screen Spring Screen Screw Seal...

  • Page 14: Mixing Module

    The Set-Up Charts on pages 48 and 50 show several of the more common sets of these (round or flat) configurations. GX-7A 400 The Mixing Module, in combination with a Pattern Control Disc (PCD) (ZAC), produce a thoroughly mixed chemical and reliable spray patterns. The module can be set up to spray at its maximum rated output.

  • Page 15: Operation

    Operation Operation Safety Lock To prevent accidental gun operation, always disconnect air supply before servicing gun or anytime gun is not in use. High-pressure fluid from dispensing devices can pierce skin. To help prevent serious injury from pressurized fluid, always engage the piston safety Grounding lock and close the material shutoff valves to avoid accidental triggering whenever you stop spraying.

  • Page 16: Manual Valves

    Operation Manual Valves Coupling Block NOTE: Triggering the gun with the manual valves (C) Chemical hoses are joined to the gun block (B) by the closed may cause crossover if the gun ports contain coupling block (J) to ease installation and removal of the residual chemical.

  • Page 17: Pressure Relief Procedure

    Operation Pressure Relief Procedure 4. Set the safety lock (H) to CLOSED (SERVICE). Follow the Pressure Relief Procedure whenever you see this symbol. This equipment stays pressurized until pressure is CLOSED (SERVICE) manually relieved. To help prevent serious injury from ti39025a pressurized fluid, such as skin injection or splashing fluid, follow the Pressure Relief Procedure when you...

  • Page 18: Flush Gun

    Operation Flush Gun Initial Set Up To avoid fire and explosion, always ground equipment 1. Remove the coupling block (J) from the gun. Follow and waste container. To avoid static sparking and Remove Coupling Block, page 16. injury from splashing, always flush at the lowest possible pressure.

  • Page 19: Daily Start-Up

    Operation Daily Start-up 7. Use a clean cloth soaked in gun cleaner to wipe clean the coupling block (J) and mating surfaces. NOTE: To avoid accumulation of dirt and other contaminants, do not apply grease to mating surfaces of the coupling block (J). Ensure the gun is attached to the coupling block (J) 8.

  • Page 20: Daily Shutdown

    Operation Daily Shutdown 3. Disconnect the air supply from the gun. 4. Shutdown the proportioning unit as required. See your Proportioner manual, Related Manuals, page 5. Clean the gun required. See Clean Spray Gun, page 24. NOTE: Do not disassemble the gun daily for cleaning if NOTE: Follow when gun is out of service for any length it is operating properly.

  • Page 21: Optional Configuration

    PN (Optional) 6. GX-7 DI model only: Align keying pin with hole in gun block (B) and push in firmly. 7. GX-7A model only: Install front packing (ZAB) into module retainer. 8. GX-7A model only: Install PCD body (ZAE) and hand tighten.

  • Page 22: Install Pcd

    Optional Configuration Install PCD Check Adjustment of Valving 1. Perform the Pressure Relief Procedure, page 17. 1. With the air supply connected, pull the gun trigger 2. Disconnect the air supply from the gun. (D) and loosen the PCD retainer (ZAD). Release the trigger.

  • Page 23: Adjust Valving Rod

    8. Loosen the forward stop locknut (A) with approximately 1/6 of a counterclockwise turn. NOTE: As a reference point, movement of one wrench GX-7A and GX-7 400 Models Only flat corresponds to 1/6 turn. 1. Perform the Pressure Relief Procedure, page 17.

  • Page 24: Maintenance

    Maintenance Maintenance Clean Spray Gun Use supplied tool kit 296835. See Tool Kit, page 52. Gun Service Kits 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. Chemicals used while spraying may cause the gun surface to become hot to touch.
  • Page 25 Maintenance 4. Remove the gun from the coupling block (J). Follow 10. Hold the gun against a grounded waste container. Remove Coupling Block, page 16. 11. Trigger the gun while holding against a grounded 5. Attach the service block of the gun service kit to the waste container until there is a fine, unobstructed spray gun, and then tighten using a 5/16 in.

  • Page 26: Repair

    Repair Repair Remove and Service Centerline Components Refer to Centerline Components, page 11, for diagrams of centerline components for all gun models. 1. Flush the gun according to Flush Gun, page 18. Shut down the proportioner and allow chemicals to cool before performing any repair procedures.
  • Page 27 (N) from the rear of gun. 18. Insect the gun block (B) for damage. d. When threads disengage remove assembly by hand. . 18 Remove Valving Rod (GX-7 DI model) . 19 Remove Valving Rod (GX-7A and GX-7 400 models) 311321V...

  • Page 28: Install Centerline Components

    Repair Install Centerline Components 10. GX-7 DI model only: ensure the valving rod (N) alignment pin enters the alignment slot in the gun block (B). Keep the gun trigger (D) depressed. GX-7 DI Model Only 11. With the gun trigger (D) depressed, thread mixing Before installation, ensure all gun components are clean module retainer (ZAM) or PCD body (ZAE) with and dry.

  • Page 29: Replace End Cap And Air Piston Assembly

    Repair Replace End Cap and Air Piston 9. Inspect the rear U-cup seal (RS) or o-ring for damage. Replace if necessary. If removed, ensure Assembly “cup” faces front of the air cylinder when replacing. 1. Clean the gun according to Clean Spray Gun, page 10.

  • Page 30: Replace Trigger Valve O-Rings

    Repair Replace Trigger Valve O-Rings NOTE: For guns configured with an air inlet at rear of the gun handle, the pipe nipple replaces the pipe plug. Remove the pipe nipple. 1. Clean the gun according to Clean Spray Gun, page 8.

  • Page 31: Clean Mixing Module

    NOTE: If the valving rod (N) is replaced, the reset 4. Remove the air cap (M) by hand. forward stop. NOTE: GX-7A and GX-7 400 Models Only 11. Clean the mixing module (ZAH). The air cap (M) and PCD retainer (ZAD) may be difficult...

  • Page 32: Install Mixing Module

    PCD (ZAC) while assembled to the gun. In this case, remove the PCD and clean inside radius. ZAC* Retainer O-Ring GX-7A Model Shown * Note the orientation of the fan tip. . 25 Clean Pattern Control Disc . 24 Install Mixing Module 311321V...
  • Page 33 Repair 311321V...

  • Page 34: Parts

    Parts Parts GX-7A Assembly 295542, 295543, 295544, 295545, 25E217, 25F046 2, 26 311321V...
  • Page 35 296724 Screen, 80 mesh (pack of 50) 296722 Check valve assembly (pack of 10) 10‡ 295384 Gun block - - - - Module; see GX-7A Mix Module Kit, page 47 12‡ 296976 PCD body 13†‡ - - - - Tip; see Tip Kits, page 52 14†‡...

  • Page 36: Di Assembly (295541)

    Parts GX-7 DI Assembly (295541) 2, 21 311321V...
  • Page 37 Parts GX-7 DI Assembly (295541) Parts List Ref. Part Description Qty. 295809 Spray gun handle assembly 15B772 Air hose, 1/4 in. x 23 in. (FXF) 295596 Coupler plug 295597 Coupler 295835 R-screen screw 296792 Screen, 80 mesh (pack of 10) 296724 Screen, 80 mesh (pack of 50) 296713 Check valve assembly (pack of 2) 295860 Gun block...

  • Page 38: 400 Assembly (295540)

    Parts GX-7 400 Assembly (295540) 1, 24 311321V...
  • Page 39 Parts GX-7 400 Assembly (295540) Parts List Ref. Part Description Qty. 15B772 Air hose 296128 Coupling block gasket (pack of 2) 295596 Coupler plug 295597 Coupler 295384 Gun block (includes 13) 296722 Check valve assembly (pack of 10) 295799 Spray gun handle assembly 16K136 Valving rod 296792...

  • Page 40: Gx-7A Handle (24K734)

    Parts GX-7A Handle (24K734) 311321V...
  • Page 41 Parts GX-7 Handle (24K734) Parts List Ref. Part Description Qty. Ref. Part Description Qty. 26 296971 Air valve spring 296862 Spray gun handle 27† 106555 O-ring 295678 Cylinder end cap assembly 28† C20988 O-ring, fluoroelastomer 295676 Spring 295438 Locknut, elastic stop nut, 5-40 295675 Air cylinder 32†...

  • Page 42: Di Handle (295809)

    Parts GX-7 DI Handle (295809) 311321V...
  • Page 43 Parts GX-7 DI Handle (295809) Parts List Ref. Part Description Qty. Ref. Part Description Qty. 295709 Socket head cap screw, 296862 Gun handle 8-32 x 3/4 in. 295714 Cylinder end cap 295662 Pipe plug, flush seal, assembly 1/8 in. 295715 Air cylinder 28...

  • Page 44: 400 Handle (24K733)

    Parts GX-7 400 Handle (24K733) 311321V...
  • Page 45 Parts GX-7 400 Handle (24K733) Parts List Ref. Part Description Qty. Ref. Part Description Qty. 295668 Spring 106245 Cap screw, SCH 295669 Socket head cap screw, 295662 Pipe plug modified 3† 106555 Packing o-ring 295671 Trigger mounting screw 4† 103337 Packing o-ring 295673 Gun block base...

  • Page 46: Coupling Block Assembly (295383)

    Parts Coupling Block Assembly (295383) All models Ref. Part Description Qty. Ref. Part Description Qty. 296970 Manual valve assembly 295662 Pipe plug, flush seal, 1/8 in. - - - - Coupling block 117634 R-swivel fitting 117635 A-swivel fitting 295693 Pipe plug, flush seal, 1/16 in.

  • Page 47: Specifications

    Specifications Specifications GX-7A Mix Module Kit Module Kit† Module Only Cleanout Tool (A) Iso Port Diameter (R) Resin Port Diameter Part Size Ref. Part Size Ref. Part in. (mm) Part in. (mm) 296909 #1 Round 296907 #1 Round 246807 0.0320 (0.81) 246807 0.032 (0.81)

  • Page 48: Set-Up Chart For Gx-7A Model

    Specifications Set-Up Chart for GX-7A Model Pattern Pressure Output Diameter Polyol Number Iso Port Number (psi) (lbs/min) (in.) Module Part Port Size Orifices Size Orifices Round Spray Pattern 1000 296909 (#1) 0.0320 0.0320 296712 22 1000 296919 (#3) 0.0180 0.0225 296710 12...

  • Page 49: Gx-7 400 Mix Module Kit

    Specifications GX-7 400 Mix Module Kit Module Kits Cleanout Drill Iso Port Diameter Polyol Port Diameter Part Size Ref. Quantity Part in. (mm) Part in. (mm) 296885 402 Round 246816 0.018 (0.45) 246816 0.018 (0.45) 296884 296859 451 Fan 246816 0.018 (0.45) 246816 0.018 (0.45)

  • Page 50: Set-Up Chart For Gx-7 400 Model

    Specifications Set-up Chart for GX-7 400 Model Pattern Pressure Output Dia. Polyol Number Iso Port Number (psi) (lbs/min) (inches) Module Part Port Size Orifices Size Orifices Round Spray Pattern 1500  8 296885 (402) 0.0180 0.0180 296858 Fan Spray Pattern 1500 ...

  • Page 51: Gx-7 Di Model Specifications

    Specifications GX-7 DI Model Specifications Module/Tip Data for Chemical Sprayed at 2500 PSI Output  Module Kit Cleanout Drill Ref. (lbs/min) Pattern Fan Spray Pattern 296900 (#2) 246625 12 in. wide 20 in. wide (0.086 diameter) 12 in. wide 20 in. wide 296901 (#4) 248892 10 in.

  • Page 52: Tip Kits

    296695 296706 296696 213- 296697 296883 SPEC 296877 296707 Tool Kit 296835 GX-7A, GX-7 DI, and GX-7 400 models: Part Description Part Description Air Valve Tool 117642 5/16 in. Hex Nut Driver 295898 Cleanout Brush 117661 Pine Vise (dual reversible chucks) 3/32 in, 9/64 in, 5/32 in.

  • Page 53: Technical Specifications

    Technical Specifications Technical Specifications GX-7A, GX-7 DI, and GX-7 400 Spray Guns Metric Maximum operating pressure 3500 psi 24 MPa, 240 bar Maximum fluid temperature 200 °F 93 °C Air supply 100-125 psi 0.7-0.9 MPa, 6.9-8.6 bar Height 9 in.

  • Page 54: 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.

This manual is also suitable for:

Gx-7a diGx-7 400

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