Danfoss MP1 Service Manual page 4

Service Manual
MP1
Contents
Operating parameters
Fluid and filter maintenance
Pressures measurements
Initial startup procedure
Troubleshooting
Adjustments
Minor repair
4 | © Danfoss | April 2019
Displacement change (approximate)................................................................................................................................34
Input Speed......................................................................................................................................................................................35
System Pressure..............................................................................................................................................................................35
Charge Pressure..............................................................................................................................................................................36
Charge Pump Inlet Pressure.......................................................................................................................................................36
Case Pressure...................................................................................................................................................................................36
Temperature.................................................................................................................................................................................... 36
Viscosity.............................................................................................................................................................................................37
Filtration System ............................................................................................................................................................................38
MP1 port locations and gauge installation...........................................................................................................................39
General ..............................................................................................................................................................................................41
MP1 start-up procedure...............................................................................................................................................................41
Overview........................................................................................................................................................................................... 43
Safety precautions......................................................................................................................................................................... 43
Electrical troubleshooting.......................................................................................................................................................... 43
System Operating Hot..................................................................................................................................................................44
Transmission Operates Normally in One Direction Only.................................................................................................44
System Does Not Operate in Either Direction..................................................................................................................... 44
System noise or vibration........................................................................................................................................................... 45
Neutral Difficult or Impossible to Find................................................................................................................................... 45
Sluggish System Response......................................................................................................................................................... 45
Pump adjustment.......................................................................................................................................................................... 46
Standard Procedures.................................................................................................................................................................... 46
Charge Pressure Relief Valve......................................................................................................................................................46
Displacement Limiter................................................................................................................................................................... 47
Control Neutral Adjustment.......................................................................................................................................................48
Mechanical/Hydraulic Neutral Adjustment..........................................................................................................................49
Servo Adjustment.....................................................................................................................................................................49
Verify neutral setting............................................................................................................................................................... 50
Servo Adjustment Side M4....................................................................................................................................................50
MP1 standard procedures and pump removal................................................................................................................... 52
EDC Control......................................................................................................................................................................................52
MP1 EDC control removal......................................................................................................................................................52
Controls inspection..................................................................................................................................................................53
MP1 EDC control assembly................................................................................................................................................... 53
MP1 control solenoids/actuator housing replacement................................................................................................... 54
MDC Control.................................................................................................................................................................................... 55
MP1 MDC control removal.................................................................................................................................................... 55
MDC Illustration................................................................................................................................................................... 56
MDC Legend......................................................................................................................................................................... 56
Controls inspection..................................................................................................................................................................57
MDC Control Assembly...........................................................................................................................................................57
Charge Pump...................................................................................................................................................................................57
MP1 charge pump removal.................................................................................................................................................. 57
MP1 charge pump inspection..............................................................................................................................................58
MP1 charge pump assembly................................................................................................................................................ 58
High Pressure Releif Valve (HPRV)............................................................................................................................................58
MP1 HPRV valve removal.......................................................................................................................................................59
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