Graco EQ300C manual Troubleshooting Examples, Checking for Leaks

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Troubleshooting

Troubleshooting Examples

Checking for Leaks

1.Open the dump valve. Check pot pressure gauge, then close the dump valve.

3.Make sure the bung is engaged with its seal. Turn the selector valve to WASH, then open the abrasive ball valve to pressurize the pot. Set the pot pressure to 145 psi (9.9 Bar, 0.99 MPa).

Look at the pressure gauge to confirm that all pressure has been relieved from the pot.

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2.Disconnect the tubing at the blast check valve (L) and at the fill port check valve (ZG).

4.Check the water pump to confirm that no water is leaking from the TSL fill port.

NOTE: The pump should stall after the pot pressurizes. If the pump does not stall, replace the seals. Refer to the pump manual for repair information.

5.Check for any water leaking from either check valve. If a check valve is leaking, it must be repaired or replaced. If the valves are damaged, the pot will not be able to maintain pressure. Also, check the pot pressure relief valve. If the valve is weeping at pot pressures of 145 psi or less, it needs to be replaced.

6.Close the abrasive ball valve , then disconnect the quick coupler and confirm that the ball valve is not leaking. Replace the abrasive ball valve if it is leaking.

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Contents Important Safety Instructions EcoQuip Vapor Abrasive Blast SystemModels Related ManualsDust and Debris Hazard Burn Hazard Compressor Size and Hose Length Minimum ID Metric OEM System GuidelinesMetric System Component Identification EQ300C and EQ600CDataTrak see DataTrak Controls, DataTrak ControlsKey Pressure Relief Procedure Checklist Before Starting OperationConnecting the Blast Hose and Air Hose Setting Up the Equipment 10 gal 200-500 lb Ti24824a 0 0 0 8 8 0 0 0 3 Blasting Tips Blasting on Higher SurfacesWood Metering Valve SettingsGrit Size Blast Pressure Abrasive Dose Blast Angle General SteelUsing the Wash Feature Refilling the Pot with Abrasive Shutting Down Operation Winterizing the Equipment See Cleaning the Auto-Vent Valve, TroubleshootingProblem Cause Solution See Repairing the Main Air RegulatorProcedure see Shutting Down, See Setting Up the Equipment,See Repairing the Diaphragm Valve Intact. See Hose Schematic,See Pressure Relief Procedure, Properly. See Hose Schematic,Metering Valve Settings, Setting Up the Equipment,If flushing does not solve the problem, see Troubleshooting Examples Checking for LeaksPneumatic Blast Control Circuit Repair Repairing the Main Air RegulatorPerform Pressure Relief Procedure, Flushing the Diaphragm Valve Repairing the Diaphragm Valve Perform the Pressure Relief Procedure,Cleaning the Auto-Vent Valve Approved Batteries Replacing the DataTrak BatteryReplace Battery Approved Fuses DataTrak Part Series Letter Fuse Required Replacing the DataTrak FuseReplace Fuse Parts EQ300C and EQ600CEQ300C and EQ600C Parts List Pressure POTEnclosure Enclosure Parts List Part Description QtyRef. Part Description Qty Pressure Pot Parts ListPressure Pot Hose Schematic EcoQuip Trailer Systems Vapor Abrasive Blast Systems and AccessoriesEcoQuip Skid Systems Model Series BrakesModel Mobile/Skid UnitsTrailer Units Model DescriptionModel Description Type Length Blast Control HosesNozzles Other Accessories Common Spare PartsDimensions EQ600S Technical SpecificationsEQ300S Graco Extended Warranty for EcoQuip Components Graco Information