Graco Inc 311321H Valving Rod Adjustment, GX-7A and GX-7 400 Models Only, GX-7 DI Model Only

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Operation Basics

Valving Rod Adjustment

GX-7A and GX-7 400 Models Only

1.Push in rear stop to SERVICE position.

2.If attached, turn both manual valves fully clockwise to close (see Manual Valves, page 13).

3.Connect air line from gun to air source to pressurize air cylinder forward to CLOSED position.

4.Loosen forward stop locknut.

Forward Stop

Locknut

Forward

Stop

FIG. 17: Forward Stop

5.Completely loosen (full CCW) forward stop. Then slowly tighten (CW) forward stop until a snug resistance is felt. From this point, reverse and loosen approxi- mately 1/16 of a turn.

6.Tighten forward stop locknut. Do not over- tighten. If locknut bottoms out before resis- tance is felt, replace friction plug.

As a reference point, movement of one wrench flat corresponds to 1/6 turn.

FIG. 18: One Wrench Flat

Valving Rod Adjustment

GX-7 DI Model Only

Valving rod requires adjustment in only the fol- lowing instances:

•disassembly and service of air cylinder

•changing valving rod

•changing mixing module

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

2.Connect air supply to gun.

3.Loosen rear seal retainer assembly one or two turns.

4.Loosen locknut from valving rod three or four turns.

5.Set safety stop to OPEN.

6.Use 5/16 in. nut driver through rear of gun to thread valving rod forward to engage PCD. When valving rod contacts PCD tighten another 1/10 turn.

7.Carefully maintain position of valving rod and tighten locknut against piston rod.

8.Retighten rear seal retainer assembly.

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311321H

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Contents 311321H Important Safety InstructionsGX-7 Contents ModelsPersonal Protective Equipment Fire and Explosion Hazard Pressurized Aluminum Parts Hazard Model GX-7A Overall ViewModel 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 HosesCoupling Block Installation and RemovalManual Valves Optional Configuration Air Inlet ConfigurationRemove Coupling Block Mixing Module and PCD Installation Do not OvertightenGX-7A and GX-7 400 Models Only Valving Rod AdjustmentGX-7 DI Model Only Initial Set Up Daily Start-up Daily ShutdownPressure Relief Procedure Trigger GunGun 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 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 PartsNo. 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 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