Graco Inc GX-7 400, 311321H, GX-7 DI, GX-7A Coupling Block, Manual Valves, Installation and Removal

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Coupling Block

Chemical hoses are joined to gun block by coupling block to ease installation and removal of gun.

Manual Valves

Two manual valves located on coupling block control flow of each chemical component to gun.

Triggering gun with manual valves closed

may cause crossover if any residual chem- ical remains in gun ports.

Never open manual valve unless coupling block is secured to gun or unless you point gun into waste container.

Open Manual Valves

Use 5/16 in. nut driver to turn manual valve counterclockwise three full turns.

Coupling

Block

Manual Valves

FIG. 14: Open Manual Valves

Operation Basics

Close Manual Valves

Use 5/16 in. nut driver to turn manual valve fully clockwise.

CAUTION

To prevent accidental gun operation, always set safety stop to CLOSED (SERVICE), close both manual valves, and disconnect air supply.

Installation and Removal

To prevent release of pressurized chemicals, close both manual valves before removing coupling block.

Install Coupling Block

1.Replace nicked, damaged, or worn cou- pling block gaskets.

2.With gaskets in place, fit coupling block to gun block.

311321H

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Contents 311321H Important Safety InstructionsGX-7 Models ContentsPersonal Protective Equipment Fire and Explosion Hazard Pressurized Aluminum Parts Hazard Model GX-7A Overall ViewModel GX-7 DI Locknut Model GX-7Valving Rod Rear Stop Gun Block Air Cap Valve TriggerGX-7A Centerline Components Centerline ComponentsGX-7 400 Centerline Components GX-7A Mixing Module Mixing ModuleOperation Basics Safety PositionIsocyanate Hazard Keep a and B Components SeparateAir Hose Connection Disengage Safety StopConnect Air Hoses Disconnect Air HosesCoupling Block Installation and RemovalManual Valves Optional Configuration Air Inlet ConfigurationRemove Coupling Block Do not Overtighten Mixing Module and PCD InstallationGX-7A and GX-7 400 Models Only Valving Rod AdjustmentGX-7 DI Model Only Initial Set Up Daily Shutdown Daily Start-upTrigger Gun Pressure Relief ProcedureGun Service Kits MaintenanceClean Spray Gun Procedure Flush Gun Repair Service Screen ScrewRemove 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 AssemblyNo. Part No. Description GX-7A Model Final AssemblyModule see GX-7A Mix Mod GX-7 DI Model Final Assembly Module see GX-7 DI Model Specifications , GX-7 DI Model Final AssemblyNo. 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 ModelGX-7 400 Mix Module Kit Module Kits Cleanout Drill Iso PortQuantity In/mm Module Only Size RefTip Kits for GX-7 400 Gun No. Ref Quantity Set-up Chart for GX-7 400 ModelModule/Tip Data for Chemical Sprayed at 2500 PSI Output GX-7 DI Model SpecificationsPattern Lbs/min Round Spray PatternTool Kits Tip KitsFor GX-7A and GX-7 DI Models Round Tip Kits Size QuantityCategory Data Technical DataGraco Standard Warranty