Independent Braking System...............................................................................................................................................35
Manufacturer’s Warranty....................................................................................................................................................... 35
Electrical Troubleshooting..........................................................................................................................................................36
Integral Filter Bypass.....................................................................................................................................................................36
Neutral Difficult or Impossible to Find................................................................................................................................... 36
Transmission Operates Normally in One Direction Only.................................................................................................36
System Operating Hot..................................................................................................................................................................37
System Will Not Operate in Either Direction........................................................................................................................37
System Noise or Vibration...........................................................................................................................................................38
Sluggish System Response.........................................................................................................................................................38
Adjustments
Standard Procedures.................................................................................................................................................................... 39
Charge Pressure Relief Valve Adjustment.............................................................................................................................40
Pressure Limiter..............................................................................................................................................................................43
Pressure Limiter Screens........................................................................................................................................................43
Pressure Limiter Adjustment (060/068 only)..................................................................................................................43
Charge check / HPRV adjustment............................................................................................................................................ 46
Engaging the Bypass Function..................................................................................................................................................47
Displacement Limiter Adjustment for Tandem Pumps................................................................................................... 48
Control Neutral Adjustment.......................................................................................................................................................50
Mechanical Neutral Adjustment...............................................................................................................................................52
Pump setup.................................................................................................................................................................................52
Servo Adjustment for Tandem Pumps...................................................................................................................................53
Minor repair
Standard Procedures at Removing Pump.............................................................................................................................56
EDC Control Repair........................................................................................................................................................................56
EDC Control Installation.........................................................................................................................................................57
Control Solenoids Repair.............................................................................................................................................................58
MDC Control Repair.......................................................................................................................................................................59
MDC Control Assembly...........................................................................................................................................................60
Angle sensor on EDC Repair.......................................................................................................................................................61
EDC with Angle Sensor Repair...................................................................................................................................................62
Shaft, Seal and Bearing Repair...................................................................................................................................................64
Shaft, Seal and Bearing Installation....................................................................................................................................65
Charge Pump Repair (045/053 only).......................................................................................................................................66
Charge Pump Installation......................................................................................................................................................67
Charge Check and HPRV Repair (045/053)............................................................................................................................68
HPRV Port Relationship...........................................................................................................................................................69
HPRV (60/68)....................................................................................................................................................................................70
Pressure Limiter Screens........................................................................................................................................................70
HPRV Repair (060/068)............................................................................................................................................................70
Charge Pressure Relief Valve Repair........................................................................................................................................72
Control Cut-off Valve / Brake Valve Repair............................................................................................................................73
Torque Chart
Fasteners and Plugs...................................................................................................................................................................... 75
Fastener Size and Torque Chart................................................................................................................................................76
Plug Size and Torque Chart........................................................................................................................................................77
Service Manual
H1T 045/053, 060/068 Axial Piston Tandem Pumps
Contents
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Danfoss | September 2020 AX152886481761en-000405
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