Graco 309550Y important safety instructions 18 B

Page 30

Repair

8. Pull mix chamber (19) out rear of fluid housing.

Inspect for damage and clean ports, page 21. Inspect o-ring (23) in front of fluid housing.

CAUTION

To prevent cross-contamination of the gun’s wetted parts, mix chamber is marked with an A and a notch

(N)on back edge. Be sure the A side of mix chamber is on the A side of gun.

9.Apply thin coat of lubricant to mix chamber (19).

Install mix chamber. Etched A and notch (N) must be on same side as A on fluid housing. Mix cham- ber is keyed to fit in fluid housing.

11. Liberally lubricate and reinstall side seal car-

tridges (18).

24

18B

18

A

TI2426A

12. Lubricate all threads and reinstall retaining ring

(9). Install air cap (10).

9

B

19

10

A	TI2428A

N

CAUTION

To prevent cross-contamination of side seal car- tridges, do not interchange A component and B com- ponent parts. The A component cartridge is marked with an A.

10. Carefully inspect side seal cartridge o-rings and

surfaces. Replace worn or damaged parts. Lib- erally lubricate o-rings (18d, 18e) and reassem- ble. Press on side seal (18c) to check proper spring (18b) operation.

18e

TI2427A

18c

18b

18d

TI2424A

13. Attach Front End, page 28.

14. Connect air, and trigger the gun a few times to

check for leaks. If either check valve pops out of its seated position, there is a poor fluid seal on that side of the mix chamber or side seal/car- tridge components. Correct the problem before attaching the fluid manifold.

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

service.

30

309550Y

Image 30

Contents Plural Component, Impingement Mix Air Purge Spray Gun Contents Manual ConventionsList of Models/Mix Chamber Selection Guide Round Pattern GunsFlat Pattern Guns In. mm 1000 psi MPa, 70 bar 249525 Flat Pattern Stud Wall GunNo., Series In. mm 249526Four-Hose Gun Spatter Pattern GunWide Round Pattern Gun Non 11 Ratio GunsPersonal Protective Equipment Fire and Explosion Hazard Overall View KeyKeep a and B Components Separate Piston Safety LockIsocyanate Hazard GroundingFollow Pressure Relief Procedure, Turning Air CapLoss of Air Pressure Setup Resin ISOSetup Shutdown Pressure Relief Procedure Position Optional ConfigurationsOptional Fluid Manifold Remove Front End,Follow Pressure Relief Procedure, page 15. Also Optional Hose PositionFlat Spray Tips Maintenance Clean Muffler Clean Outside of GunClean Air Cap Clean Fluid ManifoldClean Impingement Ports Clean Mix Chamber NozzleClean Passages Nozzle Drill Bit SizesImpingement Port Drill Bit Sizes CbipTroubleshooting Problem Cause SolutionProblem Cause Solution Theory of Operation Gun Triggered Fluid SprayingGun Detriggered Air Purging Cutaway View Lubrication Repair Tools Required Remove Front EndAttach Front End X ZMix Chamber and Side Seal Cartridges 18 B Check Valves Piston Piston Safety Lock Air ValveParts Check Valve 26 DetailSee Flat Pattern Guns, Part No. Description QtyRound Pattern Guns, See Supplied Tools,Detail Views Flat Pattern Guns Mix Chamber KitsRound Pattern Guns Mix Chamber Part No. Reference GuideCheck Valve Filter Screen Kits Flat Tip KitsGun Repair Kits Flat Tip Part No. Reference GuideDrill Bit Kits Kit Part No Qty in Kit Drill Bit Size Illustration Nominal119386 Air Purge Handle Cleanout Drill KitDrill Bit Kit 248969Stainless Steel Side Seal Kits AccessoriesWide Pattern Mix Chamber Kits Polycarballoy Side Seal KitsExtension Tip Air Cap Kit Extension Tip KitsExtension Tip Seal Kits Flat Pattern Stud Wall KitPour Nozzle Kit Spatter Conversion KitSolvent Flush Canister Kit Gun CoverTip Cleanout Tool Gun Cleaning KitCirculation Manifold Technical Data Air Flow Data in scfm m3/minCategory Data Graco Standard Warranty Graco InformationToll Free