Graco Inc 311321H, GX-7 400, GX-7A Install Centerline Components, GX-7 DI Model Only

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Repair

Install Centerline

Components

GX-7 DI Model Only

Before installation, ensure all gun components are clean and dry. Lubricate all moving parts and threads.

1.Install rear packing gland with packing wrench. Tighten onto gun block.

2.Install rear packing retainer loosely.

3.Install valving rod.

a.Connect valving rod to rod draw bar and insert into air cylinder.

b.Use 5/16 in. nut driver to thread assem- bly tight into end cap.

GX-7 DI model only: thread rod until approximately 3/16 in. to 1/4 in.of thread protrudes from end of piston rod.

4.Thread locknut onto valving rod by hand.

5.Carefully slide gun block onto valving rod toward air cylinder. Install gun block onto gun block mounting bracket.

6.Install safety stop; leave in OPEN position.

7.Connect air supply to gun.

8.Depress gun trigger and slide mixing mod- ule over end of valving rod.

GX-7 DI model only: ensure valving rod alignment pin enters alignment slot in gun block.

Keep gun trigger depressed.

9.With gun trigger depressed, thread mixing module retainer or PCD body with packing installed, by hand, and then wrench tighten.

CAUTION

To avoid damage to module and gun block, do not overtighten mixing module retainer.

10.Release gun trigger.

11.Install PCD over end of mixing module retainer.

12.Thread PCD retainer onto gun block. Hand tight.

13.Rotate flat PCD to adjust orientation as required.

14.Adjust valving rod. See Valving Rod Adjustment, page 16.

15.Thread air cap into place; hand tight.

16.Slide safety stop onto rear of air cylinder. Push safety stop partially forward and rotate clockwise to set to OPEN.

17.Set safety stop to CLOSED (SERVICE).

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311321H

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Contents Important Safety Instructions 311321HGX-7 Contents ModelsPersonal Protective Equipment Fire and Explosion Hazard Pressurized Aluminum Parts Hazard Overall View Model GX-7AModel GX-7 DI Model GX-7 LocknutValving Rod Rear Stop Gun Block Air Cap Valve TriggerCenterline Components GX-7A Centerline ComponentsGX-7 400 Centerline Components Mixing Module GX-7A Mixing ModuleSafety Position Operation BasicsIsocyanate Hazard Keep a and B Components SeparateDisengage Safety Stop Air Hose ConnectionConnect Air Hoses Disconnect Air HosesInstallation and Removal Coupling BlockManual Valves Air Inlet Configuration Optional ConfigurationRemove Coupling Block Mixing Module and PCD Installation Do not OvertightenValving Rod Adjustment GX-7A and GX-7 400 Models OnlyGX-7 DI Model Only Initial Set Up Daily Start-up Daily ShutdownPressure Relief Procedure Trigger GunMaintenance 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 Replace End Cap and Air Piston Assembly GX-7 DI ShownReplace Trigger Valve O-Rings Replace Trigger Valve O-RingClean Mixing Module Unthread Cap from PCD BodyInstall Mixing Module Install Mixing ModuleClean Pattern Control Disc GX-7A Model ShownGX-7A Model Final Assembly PartsGX-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 GX-7 400 Model Final Assembly Module Kit ,GX-7A Model Handle Assembly GX-7 Model Handle Assembly DescriptionGX-7 DI Model Handle Assembly GX-7 DI Model Handle Assembly Description QtyGX-7 400 Model Handle Assembly GX-7 400 Model Handle Assembly Coupling Block Assembly All modelsSpecifications GX-7A Mix Module KitSet-Up Chart for GX-7A Model TipModule Kits Cleanout Drill Iso Port GX-7 400 Mix Module KitQuantity In/mm Module Only Size RefSet-up Chart for GX-7 400 Model Tip Kits for GX-7 400 Gun No. Ref QuantityGX-7 DI Model Specifications Module/Tip Data for Chemical Sprayed at 2500 PSI OutputPattern Lbs/min Round Spray PatternTip Kits Tool KitsFor GX-7A and GX-7 DI Models Round Tip Kits Size QuantityTechnical Data Category DataGraco Standard Warranty