Graco Inc GX-7A, 311321H, GX-7 400, GX-7 DI Mixing Module and PCD Installation, Do not Overtighten

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Mixing Module and PCD Installation

1.Install mixing module:

a.Disconnect gun from coupling block.

b.Connect air supply to gun.

c.Set safety stop to OPEN.

d.Hold down trigger and place module over tip of valving rod.

e.Align keying pin with hole in gun block and push in firmly (GX-7 DI model only).

f.Install front packing into module retainer (GX-7 model only).

g.Install module retainer, hand tight. Release trigger.

h.Use wrench to strongly tighten module retainer (250 in.-lbs.).

GX-7 DI model only: use wrench to tighten module retainer (150 in.-lbs.).

DO NOT OVERTIGHTEN.

2.Install PCD:

a.Disconnect air supply from gun.

b.Loosen forward stop screw (GX-7 model only).

c.Turn forward stop nut clockwise (as viewed from front of gun) 1-2 turns (GX-7 model only).

d.Slightly loosen rear seal retainer assembly.

e.Remove safety stop.

Operation Basics

f.Use wrench to loosen piston locknut. Turn valving rod rearward as far as it will turn.

g.Place and orient PCD over mixing mod- ule retainer.

h.Install PCD retainer and hand tighten (GX-7 DI model only).

i.Install PCD retainer and wrench tighten (GX-7 model only).

3.Adjust valving rod. See procedure for appropriate gun model.

4.Set safety stop to OPEN position.

5.Check adjustment of valving rod:

a.With air supply connected, hold down gun trigger and loosen PCD retainer. Release trigger.

b.Hand tighten PCD retainer.

c.While maintaining tightening torque, trigger gun. Retainer should rotate approximately 1/10 of turn.

d.Release trigger.

311321H

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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