Graco Inc 24C932, 313872B, 257999, 24C934, 24C933, TI14450a Clean Check Valves

Page 27

							Maintenance
Clean Check Valves							6. Use flat tip screwdriver to pry out check valves at
							notch.

1.Follow Pressure Relief Procedure, page 22.

2.Flush Gun, page 25.

3.Disconnect air quick coupler (AC). Use hex nut driver to remove fluid manifold (AD).

TI14464a

AD

AC

TI14463a

4.Disconnect signal cable.

5.Clean and inspect check valve mating surfaces and fluid ports. See Clean Fluid Manifold on page 26.

Damaged check valve o-rings may result in external leakage. Replace o-rings if worn or damaged.

7.Press on ball (BC) to test check valve for proper movement and spring action. Replace check valve assembly if necessary.

8.Slide filter (BD) off. Clean and inspect parts. Thor- oughly inspect o-rings (BE, BG). If necessary, remove screw (BA) and disassemble check valve.

B

A

NOTICE

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.

AK

BA

BB

BC

BD

BE

BF

BG TI14464a

FIG. 21

9.Liberally lubricate o-rings (BE, BG). Reassemble check valves. Screw (BA) should be flush with check valve housing surface (within 1/16 in. or 1.5 mm).

10.Install check valves into fluid housing (AK).

313872B

27

Image 27

Contents EP Gun Important Safety InstructionsContents Related Manuals Models Orifice Flow Area Ratio ChartEP Fixed Orifice Flow Data Fixed Orifice Flowrate DataVariable Orifice Flowrate Data Orifice DiameterFlowrate gpm Variable Orifice Flowrate Data 1500 PSI Variable Orifice Flowrate Data 2000 PSI Toxic Fluid or Fumes Hazard Fire and Explosion Hazard Important Two-Component Material Information Red and B Blue Components Changing MaterialsTrigger Lock Piston Safety LockThroat Seal Liquid GroundingHook Support Loss of Air PressureHook Support 313872B Key Component IdentificationCutaway View Theory of Operation Gun Triggered Fluid PouringGun Detriggered Setup Adjust Orifices Perform Bleed Throat Seal Liquid Cartridge pro- cedure. SeeOrder to increase the pressure, turn the needle clockwise Optional Hose Position Follow Pressure Relief Procedure,Pressure Relief Procedure Long Term Shutdown Perform Pressure Relief Procedure onShutdown Short Term ShutdownBleed Throat Seal Liquid Cartridge MaintenanceSupplied Tool Kit LubricationFlush Gun Clean Outside of GunClean Breather Plug Clean Fluid ManifoldFollow Pressure Relief Procedure Clean Check Valves Clean Fluid Housing Passages Follow Pressure Relief Procedure onRemove Front End, see Clean Orifice Perform Replace Throat Seal Liquid Cartridge, Replace Mix Chamber and Front SealRepair Tools RequiredReplace Throat Seal Liquid Cartridge Perform Bleed Throat Seal Liquid Cartridge pro- cedure, see Remove Front End Perform Pressure Relief Procedure,Assemble Front End Disassemble Front EndSee Attach Front End procedure Attach Front EndPistons and Bulkhead Access Pistons Bulkhead Shaft Purge Rod 26-3.39 Nm. See Component Identification on Solenoid ValveProblem Cause Solution TroubleshootingProblem Cause Solution Electrical Diagram Model 257999 Shown PartsRing Orifice, Auto Hand-HeldOrifice, Auto Hand-Held Kits See OrificeKits on Orifice 24C751 Orifice Housing 24C756 Ring 24C805 24C815 Kits Kits Located inside back cap Orifice Kits Impingement Kit Type and Kit NumberModel Iso Model Polyol Orifice Kit Drill Bit Kits Kit Drill Bit Qty Orifice Size NumberKit Illustration Ref Part Complete O-ring Placement GuideAccessories Solvent Flush Canister Kit Solvent Flush Pail Kit248299 5.0 gal liter Pail Models without Handle 6.4 lb 2.9 kg Technical DataRef Dimension, in. mm DimensionsTechnical Data 313872B Graco Information Graco Standard Warranty