Graco TI3840a important safety instructions Check Valves

Page 41

Check Valves

Before disassembling, press on ball (36c) to test check valve for proper movement and spring action.

1. Follow Pressure Relief Procedure, page 18.

2. Flush Gun, page 22.

3. Disconnect air (D) and remove fluid manifold (G).

Clean and inspect check valve mating surfaces and fluid ports.

G

D

TI3837a

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.

4. Pry out check valves (36) at notch.

Repair

WARNING

Read warnings, page 9. Damaged check valve o-rings (36f, 36g) may result in external leakage. Replace o-rings if any damage is seen.

5. Slide filter (36d) off. Clean and inspect parts. Thor-

oughly inspect o-rings (36f, 36g). If necessary, remove screw (36b) and disassemble check valve.

B

	A	36b
		36b
		36e
		36c
		36d
36		36g
		36a
		36f	TI3836a

6. Reassemble check valves. Screw (36b) should be

flush (within 1/16 in. or 1.5 mm) of housing (36a) surface. Liberally lubricate o-rings (36f, 36g) and carefully reinstall in fluid housing.

7. Attach fluid manifold. Connect air. Return gun to service.

309856U

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Image 41

Contents Plural Component, Impingement Mix Mechanical Purge Spray Gun Important Safety InstructionsContents Manual Conventions Pressure in psi MPa, bar List of Models/Selection GuideStandard Round Pattern Guns 247291, a Standard Flat Pattern GunsFlow Rate in gpm lpm Direct Impingement Round Pattern GunsDirect Impingement Flat Pattern Guns Four-Hose Gun Personal Protective Equipment Fire and Explosion Hazard Key Overall ViewIsocyanate Hazard Piston Safety LockKeep a and B Components Separate GroundingISO SetupDisengage piston safety lock, 1/4 Turn Adjust Purge RodAdjust Flat CeramTip Shutdown Follow Pressure Relief Procedure,Daily Shutdown Shutdown for More than a DayPressure Relief Procedure Optional Fluid Manifold Position Optional ConfigurationsOptional Hose Position Follow Pressure Relief Procedure, page 18. AlsoFluid Hoses Air HoseMaintenance Clean Air Cap Clean Outside of GunClean Muffler Clean Fluid ManifoldCleaning Component a ISO Ports Clean Slip-Fit Polycarballoy Mix ModuleImpingement Port Cleanout Drill Sizes XF1313 #81 External Quick Cleaning Method Clean CeramTipCleanout Drill Sizes for Round CeramTips Round CeramTipStuck Purge Rod Clean Purge RodAdjust Purge Rod, Disassemble Front End, Adjust Front Rod SealReassemble Front End, Adjust Purge Rod, Adjust Rear Rod Seal See Clean Purge Rod, TroubleshootingAdjust Rear Rod Seal, Gun Detriggered Mechanical Purging Theory of OperationGun Triggered Fluid Spraying Cutaway View Tools Required RepairLubrication Replace CeramTipDisassemble 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 Air Valve Piston Safety Lock309856U Flush Manifold Detail PartsHandle Part No. Description QtySlip-Fit Polycarballoy Mix Module Part Numbering Code Slip-Fit Polycarballoy Mix Module KitsStandard Round Pattern Guns Standard Flat Pattern GunsDirect Impingement Flat Pattern Guns Direct Impingement Round Pattern GunsRound CeramTip Part Numbering Code CeramTip KitsFlat CeramTip Part Numbering Code Flat CeramTipsKit Part No Qty in Kit Drill Bit Size Illustration Nominal Drill Bit KitsCheck Valve Filter Screen Kits 10 per kit Gun Repair KitsAccessories Pour Nozzle Kit Solvent Flush Pail KitHose Adapter Kits Category Data Technical DataToll Free Graco Standard WarrantyGraco Information