Table Of Contents - Danfoss Series 40 M46 Service Manual

Service Manual
Series 40 M46 Variable Pumps
Contents
Introduction
Fluid and filter maintenance
Initial startup procedures
Required tools and pressure measurements
Troubleshooting
Adjustments
Minor repair
© Danfoss | September 2017
Overview..............................................................................................................................................................................................5
Warranty.............................................................................................................................................................................................. 5
General instructions........................................................................................................................................................................ 5
Remove the unit.......................................................................................................................................................................... 5
Keep it clean..................................................................................................................................................................................5
Replace all O-rings and gaskets............................................................................................................................................. 5
Safety precautions............................................................................................................................................................................5
Symbols used in Danfoss literature............................................................................................................................................6
Design...................................................................................................................................................................................................7
The system circuit.............................................................................................................................................................................8
The basic closed circuit............................................................................................................................................................. 8
Case drain and heat exchanger..............................................................................................................................................8
Pump schematic............................................................................................................................................................................... 9
Fluid and filter recommendations........................................................................................................................................... 10
Hazardous material.................................................................................................................................................................. 10
General ..............................................................................................................................................................................................11
Start-up procedure........................................................................................................................................................................ 11
Required tools................................................................................................................................................................................. 12
Port locations and gauge installation.....................................................................................................................................12
Overview........................................................................................................................................................................................... 14
Safety precautions......................................................................................................................................................................... 14
System noise or vibration........................................................................................................................................................... 14
System operating hot...................................................................................................................................................................14
System will not operate in one direction.............................................................................................................................. 15
System will not operate in either direction.......................................................................................................................... 15
Neutral difficult or impossible to find.....................................................................................................................................16
System response is sluggish...................................................................................................................................................... 16
Electrical troubleshooting.......................................................................................................................................................... 17
Standard procedures, inspections, and adjustments....................................................................................................... 18
Warranty............................................................................................................................................................................................18
Pump adjustment.......................................................................................................................................................................... 18
Charge pressure relief valve.......................................................................................................................................................18
Engaging the bypass function.................................................................................................................................................. 19
System check/relief (SCR) valves.............................................................................................................................................. 20
Displacement limiter adjustment............................................................................................................................................ 21
Swashplate neutral adjustment................................................................................................................................................22
Measured data........................................................................................................................................................................... 22
Pump Setup................................................................................................................................................................................ 22
Manual Displacement Control Neutral-Return Bracket Adjustment...........................................................................23
Measured data........................................................................................................................................................................... 23
Procedure.................................................................................................................................................................................... 23
Electric Displacement Control/Hydraulic Displacement Control Neutral Adjustment........................................ 24
Measured data........................................................................................................................................................................... 24
Procedure.................................................................................................................................................................................... 24
HC EDC Control...............................................................................................................................................................................25
Control neutral adjustment.................................................................................................................................................. 25
Standard procedures, removing the pump..........................................................................................................................28
Displacement limiter.....................................................................................................................................................................28
Pressure filtration adapter.......................................................................................................................................................... 29
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