Danfoss H1 Service Manual
Also see for H1 Series: Technical informationTechnical informationTechnical informationTechnical informationTechnical information
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Contents
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IntroductionOverview..............................................................................................................................................................................................5Warranty.............................................................................................................................................................................................. 5General instructions........................................................................................................................................................................ 5Remove the unit.......................................................................................................................................................................... 5Replace all O-rings and gaskets............................................................................................................................................. 5Safety Precautions............................................................................................................................................................................6Unintended machine movement..........................................................................................................................................6Flammable cleaning solvents................................................................................................................................................. 6Fluid under pressure.................................................................................................................................................................. 6Personal safety............................................................................................................................................................................. 6Symbols used in Danfoss literature............................................................................................................................................6Design...................................................................................................................................................................................................7Pump schematic............................................................................................................................................................................... 8The system circuit.............................................................................................................................................................................9OperationPressure Limiter Valves (060/068 only).................................................................................................................................. 11High pressure relief valve (HPRV) and charge check.........................................................................................................11Charge Pressure Relief Valve......................................................................................................................................................12Electrical displacement control (EDC).................................................................................................................................... 13Manual OverRide (MOR).............................................................................................................................................................. 14Manual Displacement Control (MDC) ....................................................................................................................................15Control-Cut-Off (CCO) valve and brake valve...................................................................................................................... 17Operating parametersOverview........................................................................................................................................................................................... 20Input speed...................................................................................................................................................................................... 20System pressure............................................................................................................................................................................. 20Charge pressure..............................................................................................................................................................................20Charge inlet pressure....................................................................................................................................................................21Case pressure...................................................................................................................................................................................21Temperature and viscosity......................................................................................................................................................... 21Temperature...............................................................................................................................................................................21Viscosity........................................................................................................................................................................................21Technical SpecificationsH1T general specifications..........................................................................................................................................................22Technical data H1 Tandem......................................................................................................................................................... 22Operating parameters H1 Tandem..........................................................................................................................................23Fluid Specifications....................................................................................................................................................................... 23Fluid and filter maintenanceFluid and filter recommendations........................................................................................................................................... 25Hazardous material.................................................................................................................................................................. 25Pressure measurementsPort locations and gauge installation - 045/053.................................................................................................................26Port locations and gauge installation - 060/068.................................................................................................................27Initial startup proceduresGeneral ..............................................................................................................................................................................................28Start-up procedure........................................................................................................................................................................ 28TroubleshootingOverview........................................................................................................................................................................................... 29Safety precautions......................................................................................................................................................................... 29Electrical troubleshooting.......................................................................................................................................................... 29Neutral difficult or impossible to find.....................................................................................................................................30System operating hot...................................................................................................................................................................30Transmission operates normally in one direction only.................................................................................................... 30System will not operate in either direction.......................................................................................................................... 30Service ManualH1 45/53/60/68 Tandem Closed Circuit Axial Piston PumpsContents© Danfoss | June 2018 520L0928 | AX00000103en-US0303 | 3 |
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