Introduction
Overview..............................................................................................................................................................................................5
General instructions........................................................................................................................................................................ 5
Remove the unit..........................................................................................................................................................................5
Keep it clean..................................................................................................................................................................................5
Replace all O-rings and gaskets............................................................................................................................................. 5
Secure the unit.............................................................................................................................................................................5
Safety precautions............................................................................................................................................................................5
Unintended Machine Movement..........................................................................................................................................5
Flammable Cleaning Solvents................................................................................................................................................6
Fluid Under Pressure..................................................................................................................................................................6
Personal Safety.............................................................................................................................................................................6
Symbols used in Danfoss literature............................................................................................................................................6
Design...................................................................................................................................................................................................6
Cross-section view........................................................................................................................................................................... 8
Operation
NPNN (Pressure Compensated Control).................................................................................................................................. 9
NPSN (Pressure Compensated Control + Load Sensing Control).................................................................................11
NPNR (Pressure Compensated Control + Remote Pressure Compensated Control)............................................ 13
TPSN (Power Control + Pressure Compensated Control + Load Sensing Control)................................................15
NNES (Electric Displacement Control + Load Sensing Control)....................................................................................17
Solenoid Specification............................................................................................................................................................ 19
Standard EDC Valve................................................................................................................................................................. 20
NNES Priority.............................................................................................................................................................................. 20
TPE2/TPE5 (Power Control + Pressure Compensated Control + Electric Displacement Control).................... 21
TPE2/TPE5 Priority....................................................................................................................................................................21
NPE2/NPE0 (Pressure Compensated Control + Electric Displacement Control).....................................................22
Operating parameters
Pressure............................................................................................................................................................................................. 23
Speed..................................................................................................................................................................................................23
Fluid.................................................................................................................................................................................................... 23
Viscosity........................................................................................................................................................................................24
Temperature...............................................................................................................................................................................24
Fluid velocity.............................................................................................................................................................................. 24
Technical specifications
D1 pump specifications...............................................................................................................................................................25
D1P fluid specifications................................................................................................................................................................26
Fluid and filter maintenance
Recommendations of fluid and filter maintenance...........................................................................................................27
Pressure measurements
Port Locations and Gauge Installation (65).......................................................................................................................... 28
Port Locations and Gauge Installation (130/145)...............................................................................................................29
Port Locations and Gauge Instalation (193/260)................................................................................................................30
Initial start-up procedures
General...............................................................................................................................................................................................31
Start-up Procedure........................................................................................................................................................................31
Troubleshooting
Excessive Noise and /or Vibration............................................................................................................................................32
Low Pump Output Flow...............................................................................................................................................................32
No or Low System Pressure........................................................................................................................................................32
Actuator Response is Sluggish..................................................................................................................................................33
Pressure or Flow Instability.........................................................................................................................................................33
System Operating Hot..................................................................................................................................................................34
High Inlet Vacuum.........................................................................................................................................................................34
Adjustments
Service Manual
D1 High Power Open Circuit Pumps Size 65/130/145/193/260
Contents
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Danfoss | July 2019 L1527453 | AX00000292en-CN0201 | 3
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