Mixing Module and PCD Installation | Graco Inc GX-7A, 311321H

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

Contents

Important Safety Instructions 311321HGX-7 Models Contents Personal 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 Valve GX-7A Centerline Components Centerline Components GX-7 400 Centerline Components GX-7A Mixing Module Mixing Module Keep a and B Components Separate Safety PositionOperation Basics Isocyanate Hazard Disconnect Air Hoses Disengage Safety StopAir Hose Connection Connect Air Hoses Installation and Removal Coupling BlockManual Valves Air Inlet Configuration Optional ConfigurationRemove Coupling Block Do not Overtighten Mixing Module and PCD Installation Valving Rod Adjustment GX-7A and GX-7 400 Models OnlyGX-7 DI Model Only Initial Set Up Daily Shutdown Daily Start-up Trigger Gun Pressure Relief Procedure Maintenance 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 Assembly Replace Trigger Valve O-Ring Replace Trigger Valve O-Rings Unthread Cap from PCD Body Clean Mixing Module Install Mixing Module Install Mixing Module GX-7A Model Shown Clean Pattern Control Disc Parts GX-7A Model Final Assembly GX-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 Assembly GX-7A Model Handle Assembly Description GX-7 Model Handle Assembly GX-7 DI Model Handle Assembly Description Qty GX-7 DI Model Handle Assembly GX-7 400 Model Handle Assembly GX-7 400 Model Handle Assembly All models Coupling Block Assembly GX-7A Mix Module Kit Specifications Tip Set-Up Chart for GX-7A Model Module Only Size Ref Module Kits Cleanout Drill Iso PortGX-7 400 Mix Module Kit Quantity In/mm Tip Kits for GX-7 400 Gun No. Ref Quantity Set-up Chart for GX-7 400 Model Round Spray Pattern GX-7 DI Model SpecificationsModule/Tip Data for Chemical Sprayed at 2500 PSI Output Pattern Lbs/min Round Tip Kits Size Quantity Tip KitsTool Kits For GX-7A and GX-7 DI Models Category Data Technical Data Graco Standard Warranty