Graco Inc GX-7A, 311321H, GX-7 400, GX-7 DI Clean Mixing Module, Unthread Cap from PCD Body

Page 27

Clean Mixing Module

1.Flush gun according to Clean Spray Gun Procedure, page 20.

2.Connect air supply to gun. Set safety stop to OPEN.

3.Remove air cap by hand.

GX-7A and GX-7 400 Models Only

Air cap and PCD retainer may be difficult to separate during disassembly due to overtightening or hardened mixed material. Use retainer wrench to separate. When reinstalling, apply lubricant to threads.

FIG. 27: Unthread Cap from PCD Body

4.Trigger gun and hold it to relieve pressure on PCD retainer.

5.Remove PCD retainer by turning it counter- clockwise.

6.Remove PCD from mixing module retainer.

To remove PCD that is stuck, set safety

stop to OPEN, depress and release gun trigger to unseat it. Set safety stop to

CLOSED (SERVICE).

7.Remove mixing module retainer.

8.Set safety stop to OPEN. Depress and release gun trigger to unseat it. Remove

Repair

mixing module from end of valving rod. Set safety stop to CLOSED (SERVICE).

9.Inspect valving rod for damage and replace as required. Use cloth soaked in gun cleaner or steel wool to clean and remove buildup of mixed material from rod.

If the valving rod is replaced, reset forward stop.

10. Clean mixing module.

Ensure cleanout tool size matches module size used. See the Set-Up Charts on

pages 44 and 46.

a.Insert cleanout tool into pin vise.

b.Use cleanout tool to clean module ports. Take care not to insert tool too far causing damage to inside bore of mod- ule. Use cotton swab soaked in gun cleaner to clean bore of module.

FIG. 28: Clean Module Ports

311321H

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Image 27

Contents Important Safety Instructions 311321HGX-7 Models ContentsPersonal Protective Equipment Fire and Explosion Hazard Pressurized Aluminum Parts Hazard Overall View Model GX-7AModel GX-7 DI Trigger Model GX-7Locknut Valving Rod Rear Stop Gun Block Air Cap ValveGX-7A Centerline Components Centerline ComponentsGX-7 400 Centerline Components GX-7A Mixing Module Mixing ModuleKeep a and B Components Separate Safety PositionOperation Basics Isocyanate HazardDisconnect Air Hoses Disengage Safety StopAir Hose Connection Connect Air HosesInstallation and Removal Coupling BlockManual Valves Air Inlet Configuration Optional ConfigurationRemove Coupling Block Do not Overtighten Mixing Module and PCD InstallationValving Rod Adjustment GX-7A and GX-7 400 Models OnlyGX-7 DI Model Only Initial Set Up Daily Shutdown Daily Start-upTrigger Gun Pressure Relief ProcedureMaintenance Gun Service KitsClean Spray Gun Procedure Flush Gun Service Screen Screw RepairRemove Centerline Components Remove valving rod. Rod Draw Bar Valving Rod Install Centerline Components GX-7 DI Shown Replace End Cap and Air Piston AssemblyReplace Trigger Valve O-Ring Replace Trigger Valve O-RingsUnthread Cap from PCD Body Clean Mixing ModuleInstall Mixing Module Install Mixing ModuleGX-7A Model Shown Clean Pattern Control DiscParts GX-7A Model Final AssemblyGX-7A Model Final Assembly No. Part No. DescriptionModule see GX-7A Mix Mod GX-7 DI Model Final Assembly GX-7 DI Model Final Assembly Module see GX-7 DI Model Specifications ,No. Part No. Description Qty GX-7 400 Model Final Assembly Module Kit , GX-7 400 Model Final AssemblyGX-7A Model Handle Assembly Description GX-7 Model Handle AssemblyGX-7 DI Model Handle Assembly Description Qty GX-7 DI Model Handle AssemblyGX-7 400 Model Handle Assembly GX-7 400 Model Handle Assembly All models Coupling Block AssemblyGX-7A Mix Module Kit SpecificationsTip Set-Up Chart for GX-7A ModelModule Only Size Ref Module Kits Cleanout Drill Iso PortGX-7 400 Mix Module Kit Quantity In/mmTip Kits for GX-7 400 Gun No. Ref Quantity Set-up Chart for GX-7 400 ModelRound Spray Pattern GX-7 DI Model SpecificationsModule/Tip Data for Chemical Sprayed at 2500 PSI Output Pattern Lbs/minRound Tip Kits Size Quantity Tip KitsTool Kits For GX-7A and GX-7 DI ModelsCategory Data Technical DataGraco Standard Warranty