Displacement change (approximate)................................................................................................................................34
Operating parameters
Input Speed......................................................................................................................................................................................35
System Pressure..............................................................................................................................................................................35
Charge Pressure..............................................................................................................................................................................36
Charge Pump Inlet Pressure.......................................................................................................................................................36
Case Pressure...................................................................................................................................................................................36
Temperature....................................................................................................................................................................................36
Viscosity.............................................................................................................................................................................................37
Fluid and filter maintenance
Filtration System ............................................................................................................................................................................38
Pressures measurements
MP1 port locations and gauge installation...........................................................................................................................39
Initial startup procedure
General ..............................................................................................................................................................................................41
MP1 start-up procedure...............................................................................................................................................................41
Troubleshooting
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
Adjustments
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
Minor repair
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
Service Manual
MP1
Contents
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Danfoss | April 2019 AX00000244en-000201
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