Name: Danfoss Series 40 M46 Tandem
Brand: Danfoss
Rating: 4 (1 reviews)

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Introduction

Overview..............................................................................................................................................................................................4

Warranty.............................................................................................................................................................................................. 4

General instructions........................................................................................................................................................................ 4

Safety precautions............................................................................................................................................................................4

Symbols used in Danfoss literature............................................................................................................................................6

Design...................................................................................................................................................................................................6

The system circuit.............................................................................................................................................................................7

Pump schematic............................................................................................................................................................................... 9

Fluid and filter maintenance

Fluid and filter recommendations........................................................................................................................................... 10

Initial startup procedures

General ..............................................................................................................................................................................................11

Start-up procedure........................................................................................................................................................................11

Pressure measurements

Required tools.................................................................................................................................................................................13

Port locations and gauge installation.....................................................................................................................................13

Troubleshooting

Overview........................................................................................................................................................................................... 15

Safety precautions.........................................................................................................................................................................15

System noise or vibration........................................................................................................................................................... 15

System operating hot...................................................................................................................................................................15

System will not operate in one direction.............................................................................................................................. 16

System will not operate in either direction.......................................................................................................................... 16

Neutral difficult or impossible to find.....................................................................................................................................17

System response is sluggish...................................................................................................................................................... 17

Electrical troubleshooting.......................................................................................................................................................... 18

Adjustments

Standard procedures, inspections, and adjustments....................................................................................................... 19

Warranty............................................................................................................................................................................................19

Pump adjustment..........................................................................................................................................................................19

Charge pressure relief valve.......................................................................................................................................................19

Engaging the bypass function.................................................................................................................................................. 20

System check/relief (SCR) valves.............................................................................................................................................. 21

Displacement limiter adjustment............................................................................................................................................ 22

Displacement limiter adjustment data.................................................................................................................................. 23

Swashplate neutral adjustment................................................................................................................................................23

Manual Displacement Control Bracket Neutral Adjustment..........................................................................................24

Electronic Displacement Control/Hydraulic Displacement Control Neutral Adjustment...................................25

Minor repair

Standard procedures, removing the pump..........................................................................................................................27

Displacement limiter.....................................................................................................................................................................27

Pressure filtration adapter.......................................................................................................................................................... 28

Charge pump...................................................................................................................................................................................29

Shaft seal...........................................................................................................................................................................................31

SCR valves.........................................................................................................................................................................................32

Charge pressure relief valve.......................................................................................................................................................33

Bypass valve.....................................................................................................................................................................................34

Manual displacement control....................................................................................................................................................35

Electronic Displacement Control/Hydraulic Displacement Control............................................................................36

MDC orifice repair..........................................................................................................................................................................38

EDC/HDC orifice repair.................................................................................................................................................................39

Torque chart

Fastener size and torque chart..................................................................................................................................................41

Plug size and torque chart..........................................................................................................................................................41

Service Manual