Graco 309550Y important safety instructions Check Valves, Clean Fluid Manifold

Page 31

Check Valves

Before disassembling, press on ball (26c) to test check valve for proper movement and spring action.

1. Follow Pressure Relief Procedure, page 15.

2. Remove fluid manifold (M). Leave air connected.

Clean Fluid Manifold, page 20.

M

TI2543A

3. Flush gun to remove residual A and B compo-

nents, page 20. Follow Pressure Relief Proce- dure, page 15.

4. Disconnect air.

TI2540A

CAUTION

To prevent cross-contamination of the check valves, do not interchange A component and B component parts. The A component check valve is marked with an A.

Repair

5. Pry out check valves (26) at notch.

WARNING

Read warnings, page 7. Damaged check valve o-rings (26f, 26g) may result in external leakage. Replace o-rings if any damage is seen.

6. Slide filter (26d) off. Clean and inspect parts. Thor-

oughly inspect o-rings (26f, 26g). If necessary, remove screw (26b) and disassemble entire check valve.

B

A

26b

26e

26c

26d

26

26g

26a

26f TI2429A

7. Reassemble check valves. Screw (26b) should be

flush (within 1/16 in. or 1.5 mm) of housing (26a) surface. Liberally lubricate o-rings (26f, 26g) and carefully reinstall in fluid housing.

8. Attach fluid manifold. Connect air. Return gun to

service.

309550Y

31

Image 31

Contents Plural Component, Impingement Mix Air Purge Spray Gun Manual Conventions ContentsRound Pattern Guns List of Models/Mix Chamber Selection GuideFlat Pattern Guns 249526 Flat Pattern Stud Wall GunNo., Series In. mm In. mm 1000 psi MPa, 70 bar 249525Non 11 Ratio Guns Spatter Pattern GunWide Round Pattern Gun Four-Hose GunPersonal Protective Equipment Fire and Explosion Hazard Key Overall ViewGrounding Piston Safety LockIsocyanate Hazard Keep a and B Components SeparateTurning Air Cap Follow Pressure Relief Procedure,Loss of Air Pressure Resin ISO SetupSetup Shutdown Pressure Relief Procedure Remove Front End, Optional ConfigurationsOptional Fluid Manifold PositionOptional Hose Position Follow Pressure Relief Procedure, page 15. AlsoFlat Spray Tips Maintenance Clean Fluid Manifold Clean Outside of GunClean Air Cap Clean MufflerNozzle Drill Bit Sizes Clean Mix Chamber NozzleClean Passages Clean Impingement PortsCbip Impingement Port Drill Bit SizesProblem Cause Solution TroubleshootingProblem Cause Solution Gun Triggered Fluid Spraying Theory of OperationGun Detriggered Air Purging Cutaway View Remove Front End RepairTools Required LubricationX Z Attach Front EndMix Chamber and Side Seal Cartridges 18 B Check Valves Piston Air Valve Piston Safety LockCheck Valve 26 Detail PartsSee Supplied Tools, Part No. Description QtyRound Pattern Guns, See Flat Pattern Guns,Detail Views Mix Chamber Part No. Reference Guide Mix Chamber KitsRound Pattern Guns Flat Pattern GunsFlat Tip Part No. Reference Guide Flat Tip KitsGun Repair Kits Check Valve Filter Screen KitsKit Part No Qty in Kit Drill Bit Size Illustration Nominal Drill Bit Kits248969 Air Purge Handle Cleanout Drill KitDrill Bit Kit 119386Polycarballoy Side Seal Kits AccessoriesWide Pattern Mix Chamber Kits Stainless Steel Side Seal KitsFlat Pattern Stud Wall Kit Extension Tip KitsExtension Tip Seal Kits Extension Tip Air Cap KitGun Cover Spatter Conversion KitSolvent Flush Canister Kit Pour Nozzle KitGun Cleaning Kit Tip Cleanout ToolCirculation Manifold Air Flow Data in scfm m3/min Technical DataCategory Data Graco Information Graco Standard WarrantyToll Free