HP G-04, D-04 manual Valve Wear, Loss of Oil, Premature Failure of Valve Spring or Retainer

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Valve Wear

•Normal wear from high-speed operation

•Cavitation

•Abrasives in the fluid

•Valve incompatible with corrosives in the fluid

•Pump running too fast

•External seepage

•Rupture of diaphragm

•Frozen pump

•Worn shaft seal

•Oil drain piping or fill cap loose.

•Valve plate and manifold bolts loose

•Pump housing porosity

•Cavitation

•Foreign object in the pump

•Pump running too fast

•Spring/retainer material incompatible with fluid being pumped

•Excessive inlet pressure.

18	D04-991-2400 5/1/04

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Contents Models D-04, G-04 04 Contents 04 SpecificationsPerformance Net Positive Suction Head NPSHrDry Lift 04 Dimensions 04 Models with Metallic Pumping HeadLocation 04 InstallationImportant Precautions MountingInlet Piping Suction Feed Inlet Piping Pressure FeedInlet Calculations Net Positive Suction Head Discharge PipingFriction Losses Hose and RoutingInitial Start-Up Procedure Before Initial Start-UpDaily 04 MaintenanceShutdown Procedure During Freezing Temperatures Periodically04 Service Fluid End Bolt Torque SpecificationsRef. No Tools and Supplies Remove Manifold 3 and Valve PlateInspect Valves Prime the Hydraulic Cells Inspect and Replace DiaphragmsFlush Contaminant from Hydraulic End Only if a diaphragm has rupturedReinstall Valve Plate 12 and Manifold 04 Service Hydraulic End Reassemble Pistons Remove Pump HousingDisassemble Pistons Remove and Replace PistonsReplace Shaft Seal Reassemble Housing and Back CoverReinstall Diaphragms Reassemble Pump04 Troubleshooting Valve Wear Loss of OilPremature Failure of Valve Spring or Retainer Limited Warranty Wanner ENGINEERING, INC