Graco 3A0420T important safety instructions Maintenance

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Maintenance

Maintenance

Hose Electrical Resistance

Check electrical resistance of hoses regularly. If total resistance to ground exceeds 29 megohms, replace hose immediately.

Filters

Once a week check, clean, and replace (if needed) the following filters.

•Both pump filters; see lower manual for instructions.

•Main air inlet manifold filter; see Replace Air Filter Element, page 36.

•Spray gun handle filter; see spray gun manual.

Seals

Once a week, check and tighten throat seals on both

pumps. See table for torque specifications. Be sure to follow the Pressure Relief Procedure, page 22, prior to

tightening seals. There must be zero pressure on the pumps when adjusting.

Pump Size	Torque Specification

All	25-30 ft-lb (34-41 N•m)

Cleaning Procedure

1.Ensure all equipment is grounded. See Grounding, page 18.

2.Ensure the area where the system will be cleaned is well ventilated and remove all ignition sources.

3.Turn off all heaters and allow equipment to cool.

4.Flush mixed material. See Flush Mixed Material, page 28.

5.Relieve pressure. See Pressure Relief Procedure, page 22.

6.Shutdown the sprayer and turn off all power. See

Shutdown, page 30.

7.Clean the external surfaces only using a rag soaked in solvent that is compatible with the spray material and surfaces being cleaned.

8.Allow enough time for the solvent to dry before using the system.

Recommended Spare Parts

Keep these spare parts on hand to reduce downtime. See Recommended Spare Parts, page 54.

Change the Mix Ratio

In order to change the mix ratio, one or both pumps need to be replaced, the air motor needs to be re-posi- tioned, and the over pressure relief valves may need to be installed.

NOTE: Only Xtreme XP lower pumps come with a rod coupling.

1.Check the Varying Parts table on page 51 for the correct pump sizes.

2.Remove and replace pump. See page 35.

3.Adjust the position of the air motor. See page 20.

4.If changing from one type of XP system to another (for example - changing from XP35 to XP70 or from XP70 to XP35): remove the existing

over pressure relief valves (302) and install the cor- rect valves for the new system type. See Replace Over Pressure Relief Valves on page 38.

5.Change air pressure relief valve as required, depending on ratio. See air relief valve (64) in tables starting on page 46.

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3A0420T

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Contents XP Proportioners Contents Related Manuals Fire and Explosion Hazard Skin Injection Hazard Toxic Fluid or Fumes Hazard Important Two-Component Material Information Equipment Designations Changing MaterialsB Component Designations Over Pressure Protection OverviewUsage Initial System Setup Models Cart-Mounted SystemsPump Volume Max Fluid Max Air Mix Gallon Bare Proportioning Pump Packages Building systems with bare proportioning pumpPackages Over Pressure Protection must be used, seeComponent Identification Mounting Components forFluid Control Assembly Main Air ControlsAir Controls Solvent Flush Pump Kit 262393 optionalPump Key Fluid Line Accessories Flush Before Using EquipmentOptional Accessories Air LineGrounding SetupLocation Wire Systems with Explosion-Proof Heaters Hazardous location systems onlyChange Motor Position Motor PositionCheck Motor Position Connect Static Mixers, Gun, and Hoses Connect Air SupplyConnect Fluid Hose Bundles Remote Mix Manifold Only Pressure Relief Procedure Relieve a and B Fluid PressurePrime Empty System Prime a and B FluidsPrime Solvent Flush Pump Heat Fluid Follow Prime Empty System,Spray To Adjust the Restrictor Side Mix Manifold RestrictionFollow Pressure Relief Procedure, Flush Mixed MaterialFlush Mix Manifold, Hose, and Spray Gun Use Optional Solvent PumpProcedure GuidelinesShutdown ParkSystem Verification Maintenance Troubleshooting Problem Cause SolutionPump Troubleshooting Hardener Pump FallingTrouble Area Resin Pump Leakage Resin PumpPump Assembly Remove Pump AssemblyRemove Displacement Pump RepairReplace Air Control Assembly Remove MotorReplace Air Filter Element Replace System Air RegulatorAir Control Assembly Air FlowReplace Over Pressure Relief Valves Mix Manifold AssemblyFluid Circulation Manifold with Over Pressure Relief Valves Fluid Circulation Manifold Replacement Guide CirculationTarget Opening Manifold Valve Pressure Color Psi MPa, bar Use withHoppers Optional Solvent PumpReplace Service and RepairOptional Fluid Heaters Parts Cart-Mounted SystemStandard Mix Manifold Models Quickset Mix Manifold Models Parts Common to All Systems Description Qty WasherParts Varying By Model XP35 Systems Ref Part Description Coupling 283101 283102 283201 283202 283301 283302 283401 283402 Parts Varying By Model XP70 Systems Part Description Bare Proportioning Pump Package Model 571100 shownParts Common to All Pump Packages Parts Varying by Pump PackageAir Controls Qty Ref. No. Part No. DescriptionAssembly 262784 XP35 262783 XP50 262806 XP70 Fluid Circulation Manifold with Over Pressure Relief ValvePart Description Qty Ref Manifold to also fit Series a XP Proportioners withRecommended Spare Parts Pump Repair KitsPump Filter O-rings packs Recirculation/Overpressure valve seeAccessories and Kits Acceptable For Use in Explosive AtmospheresNot Approved For Explosive Atmospheres Technical Data Side View DimensionsTop View Floor Mounting Dimensions, Top View Bare Proportioner Mounting Hole Dimensions Wall Mount Bracket 262812 Dimensions Floor Stand 24M281 Dimensions Hydraulic Unit DimensionsDimensions 3A0420T Graco Standard Warranty Graco Information