Graco 311320H important safety instructions Repair, Filter Screen Removal and Service

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Repair

Repair

Shut down proportioner and allow chemicals to cool before performing any repair proce- dures.

Clean Center Line Components using Gun Service Kit prior to performing any repair pro- cedures.

Filter Screen Removal and Service

1.Perform Pressure Relief Procedure (page 13) and Clean Spray Gun Procedure, page 18.

2.Unthread screen mounting screw. Remove screen mounting screw and filter screen assembly from gun block.

Screen Screw

Seal

Screen

Snap Ring

Mounting Screw

FIG. 17: Filter Screen Assembly

3.Remove screen screw retainer (snap ring at end of screw) and screen. If screen is dirty and clogged, replace it.

4.Clean and inspect screen cavity. If particles are visible, remove with cleanout drills and flush thoroughly with gun cleaner.

CAUTION

Any remaining material in cavity on down stream side of screen will clog mixing cham- ber.

5.Inspect seal, and replace if worn or dam- aged.

6.Reinstall filter screen assembly. With seal in place, install screen and retainer clip-on screen screw.

7.Install screen assembly to gun block. Ensure screw is tight to prevent leakage.

8.Flush gun after cleaning cavity and screen. See Clean Spray Gun Procedure, page 18.

311320H

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Contents Model D Spray Gun Important Safety InstructionsModels ContentsPersonal Protective Equipment Fire and Explosion Hazard Major Components Overall ViewCenterline Components Centerline ComponentsKeep a and B Components Separate Operation BasicsGrounding Isocyanate HazardRemove Coupling Block Manual ValvesAir Hose Connection Valving Rod Adjustment ScrewFelt Wiper Air Cap Adjustment ValveAdjust Felt Wiper Clean Felt WiperValving Rod Closed Position Initial Set UpDaily Shutdown Daily Start-UpPressure Relief Procedure Point of Valving Spray Pattern AdjustmentTern opens as adjustment is made FIG Turns Out From Point Recommended Valving Rod Adjustment for Standard Mixing Chambers Distance of Gun Chamber Minimum Maximum From Surface Gun Service Kits MaintenanceClean Spray Gun Procedure Repair Filter Screen Removal and ServiceCheck Valves Clean Injection SlotsNot Remove Valving Rod AdjustmentMixing Chamber Removal Centerline Component RemovalSleeve Removal Block Chamber Seating Centerline Component InstallationRepair Parts Model D Spray Gun AssemblyNo. Part No. Description Model D Spray Gun AssemblyAC chamber Standard Mixing Chambers Part Number Air Cylinder AssemblyModel Coupling Block Assembly311320H Category Data Technical DataGraco Information Graco Standard Warranty
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