Theory of Operation, Gun Triggered Fluid Spraying | Graco TI3840a

Troubleshooting

Theory of Operation

Gun Triggered (Fluid Spraying)

Purge rod (31) moves back, opening impingement ports (IP). Components A and B combine in mix module (39). Fluid sprays from CeramTip (40).

Cleanoff air flows whether gun is triggered or detrig- gered. See page 13 to adjust.

KEY

Fluid

Cleanoff Air

31IP

40

39

TI3882a

Gun Detriggered (Mechanical Purging)

Purge rod (31) moves forward, closing impingement ports (IP) and shutting off fluid flow. Rod pushes through mix module (39) and bottoms on CeramTip (40), forcing out excess fluid and restoring proper orifice diameter.

Cleanoff air flows whether gun is triggered or detrig- gered. See page 13 to adjust.

KEY

Fluid

Cleanoff Air

31IP

39 40

TI3881a

32

309856U

Image 32

Graco TI3840a Theory of Operation, Gun Triggered Fluid Spraying, Gun Detriggered Mechanical Purging

Contents

Important Safety Instructions Plural Component, Impingement Mix Mechanical Purge Spray Gun Contents Manual Conventions Pressure in psi MPa, bar List of Models/Selection GuideStandard Round Pattern Guns Standard Flat Pattern Guns 247291, a Direct Impingement Round Pattern Guns Flow Rate in gpm lpm Direct Impingement Flat Pattern Guns Four-Hose Gun Personal Protective Equipment Fire and Explosion Hazard Overall View Key Piston Safety Lock Isocyanate HazardKeep a and B Components Separate Grounding Setup ISO Disengage piston safety lock, Adjust Purge Rod 1/4 Turn Adjust Flat CeramTip Follow Pressure Relief Procedure, ShutdownDaily Shutdown Shutdown for More than a Day Pressure Relief Procedure Optional Configurations Optional Fluid Manifold Position Follow Pressure Relief Procedure, page 18. Also Optional Hose PositionFluid Hoses Air Hose Maintenance Clean Outside of Gun Clean Air CapClean Muffler Clean Fluid Manifold Clean Slip-Fit Polycarballoy Mix Module Cleaning Component a ISO Ports Impingement Port Cleanout Drill Sizes XF1313 #81 Clean CeramTip External Quick Cleaning MethodCleanout Drill Sizes for Round CeramTips Round CeramTip Stuck Purge Rod Clean Purge RodAdjust Purge Rod, Disassemble Front End, Adjust Front Rod SealReassemble Front End, Adjust Purge Rod, Adjust Rear Rod Seal Troubleshooting See Clean Purge Rod, Adjust Rear Rod Seal, Gun Detriggered Mechanical Purging Theory of OperationGun Triggered Fluid Spraying Cutaway View Repair Tools RequiredLubrication Replace CeramTip Disassemble Front End Reassemble Front End Adjust Purge Rod, Slip-Fit Polycarballoy Mix Module Attach fluid manifold. Return gun to service Rear Rod Seal Check Valves Piston and Purge Rod Install piston safety lock assembly until bottomed out Piston Safety Lock Air Valve 309856U Parts Flush Manifold Detail Part No. Description Qty Handle Slip-Fit Polycarballoy Mix Module Kits Slip-Fit Polycarballoy Mix Module Part Numbering CodeStandard Round Pattern Guns Standard Flat Pattern Guns Direct Impingement Round Pattern Guns Direct Impingement Flat Pattern Guns CeramTip Kits Round CeramTip Part Numbering CodeFlat CeramTip Part Numbering Code Flat CeramTips Drill Bit Kits Kit Part No Qty in Kit Drill Bit Size Illustration Nominal Gun Repair Kits Check Valve Filter Screen Kits 10 per kit Accessories Pour Nozzle Kit Solvent Flush Pail KitHose Adapter Kits Technical Data Category Data Toll Free Graco Standard WarrantyGraco Information