Valving Rod Adjustment, GX-7 DI Model Only | Graco Inc 311321H

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

Contents

311321H Important Safety InstructionsGX-7 Contents Models Personal 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 Trigger Centerline Components GX-7A Centerline Components GX-7 400 Centerline Components Mixing Module GX-7A Mixing Module Safety Position Operation BasicsIsocyanate Hazard Keep a and B Components Separate Disengage Safety Stop Air Hose ConnectionConnect Air Hoses Disconnect Air Hoses Coupling Block Installation and RemovalManual Valves Optional Configuration Air Inlet ConfigurationRemove Coupling Block Mixing Module and PCD Installation Do not Overtighten GX-7A and GX-7 400 Models Only Valving Rod AdjustmentGX-7 DI Model Only Initial Set Up Daily Start-up Daily Shutdown Pressure Relief Procedure Trigger Gun Gun 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 Shown Replace Trigger Valve O-Rings Replace Trigger Valve O-Ring Clean Mixing Module Unthread Cap from PCD Body Install Mixing Module Install Mixing Module Clean Pattern Control Disc GX-7A Model Shown GX-7A Model Final Assembly Parts No. 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 Description GX-7 DI Model Handle Assembly GX-7 DI Model Handle Assembly Description Qty GX-7 400 Model Handle Assembly GX-7 400 Model Handle Assembly Coupling Block Assembly All models Specifications GX-7A Mix Module Kit Set-Up Chart for GX-7A Model Tip Module Kits Cleanout Drill Iso Port GX-7 400 Mix Module KitQuantity In/mm Module Only Size Ref Set-up Chart for GX-7 400 Model Tip Kits for GX-7 400 Gun No. Ref Quantity GX-7 DI Model Specifications Module/Tip Data for Chemical Sprayed at 2500 PSI OutputPattern Lbs/min Round Spray Pattern Tip Kits Tool KitsFor GX-7A and GX-7 DI Models Round Tip Kits Size Quantity Technical Data Category Data Graco Standard Warranty