Table Of Contents - Danfoss MP1 Service Manual

Service Manual
MP1
Contents
Introduction
Technical specifications
Operation
© Danfoss | April 2019
Hydrostatics Servicing Overview................................................................................................................................................ 6
General instructions........................................................................................................................................................................ 6
Remove the unit.......................................................................................................................................................................... 6
Lubricate moving parts.............................................................................................................................................................6
Replace all O-rings and gaskets............................................................................................................................................. 6
Safety Precautions............................................................................................................................................................................7
Unintended Machine Movement..........................................................................................................................................7
Flammable Cleaning Solvents................................................................................................................................................7
Fluid Under Pressure..................................................................................................................................................................7
Personal Safety.............................................................................................................................................................................7
Symbols used in Danfoss literature............................................................................................................................................7
MP1 design specifications.............................................................................................................................................................9
MP1 technical data...........................................................................................................................................................................9
MP1 operating parameters.........................................................................................................................................................10
MP1 fluid specifications...............................................................................................................................................................10
MP1 high pressure relief valve (HPRV) and charge check............................................................................................... 11
Bypass Function..............................................................................................................................................................................11
MP1 charge pressure relief valve (CPRV) function............................................................................................................. 12
Loop flushing valve....................................................................................................................................................................... 13
Electrical displacement control (EDC).................................................................................................................................... 14
EDC principle..............................................................................................................................................................................14
EDC operation............................................................................................................................................................................14
Control Signal Requirements, EDC ....................................................................................................................................15
EDC Solenoid Data................................................................................................................................................................... 15
Control Response......................................................................................................................................................................16
MP1 EDC response time....................................................................................................................................................16
Manual Over Ride (MOR)........................................................................................................................................................16
Swash Plate Angle Sensor for EDC Controls.........................................................................................................................18
Swash Plate Angle Sensor Parameters (EDC)..................................................................................................................18
Swash Plate Angle Sensor Connector............................................................................................................................... 19
Interface with ECU (EDC)........................................................................................................................................................19
Manual displacement control....................................................................................................................................................19
MDC principle............................................................................................................................................................................ 19
MDC Operation..........................................................................................................................................................................21
MDC Shaft Rotation................................................................................................................................................................. 21
Control Response......................................................................................................................................................................22
MP1 MDC response time.................................................................................................................................................. 22
Neutral Start Switch (NSS)..................................................................................................................................................... 22
Case gauge port M14.............................................................................................................................................................. 23
Lever..............................................................................................................................................................................................24
Forward-neutral-reverse (FNR) electic control.................................................................................................................... 24
FNR principle.............................................................................................................................................................................. 24
Control Response......................................................................................................................................................................26
Response time, FNR............................................................................................................................................................27
Non Feedback Proportional Electric Control (NFPE)......................................................................................................... 27
Control Signal Requirements............................................................................................................................................... 28
Control Response......................................................................................................................................................................28
Response Time..................................................................................................................................................................... 29
Non-Feedback, Proportional Hydraulic (NFPH) Control.................................................................................................. 29
Control Response......................................................................................................................................................................30
Response Time..................................................................................................................................................................... 31
Control-Cut-Off valve (CCO valve)........................................................................................................................................... 32
CCO Solenoid Data...................................................................................................................................................................33
Brake gauge port with MDC................................................................................................................................................. 34
Displacement limiter.....................................................................................................................................................................34
AX00000244en-000201 | 3