Servo Motor Yuken ASR1 The ASR Series provides variable flow by driving a piston pump directly with an AC servo motor and controlling the rotational speed in a range from zero to the maximum level.
Hydraulic Fluid :
- Hydraulic Fluid, Used clean petroleum base oil equivalent to ISO VG32 or 46. The recommended viscosity range is from 20 to 400 mm2/s and temperature range is from 0 to 60c, both of which have to be satisfied for the use of the above hydraulic oils.
- Control of Contamination, Due caution must be paid to maintaining control over contamination of the operating oil which can otherwise lead to breakdowns and shorten the life of the unit.
Instructions :
- Transportation
- For transportation use the lifting rings on the pump. Do not use lifting cables at places other than the lifting rings.
- Mounting
- When installing the pump the filling port should be positioned upwards.
- Suction Pressure
- Permissible suction pressure at the inlet port of the pump is between -16.7 and+50 kPa. For piping to the suction port, use pipes of the nominal diameters shown below.
- Hints on piping
- When using steel pipes for the suction or discharge ports, excessive load from the piping to the pump generates excessive noise. Whenever there is fear of excessive load, please use rubber hoses.
- Drain Piping
- Install drain piping according to the chart and ensure that pressure within the pump housing should be maintained at a nominal pressure of less than 0.1 MPa and surge pressure of less 0.5 MPa.
- Starting
- Before first starting, fill the pump case with clean operating oil via the filling port.
- Bleeding Air
- It may be necessary to bleed air from the pump case and lines to remove cause of vibration.
System Configuration :
- Energy saving with low heat generation.
- Low Noise.
- High Performance.
- Digital AMSR controller that saves space and wiring.
- Dual displacement type for a wider operation range.
- Large flow.

Specification :
- Model No : ASR1
- Power Capacity : C
- Flow Control :
- Max. Flow : 39.5 L/min
- Min. Adj. Flow : 1%
- Hysteresis : 1% or less
- Repeatability : 1% or less
- Input Signal Voltage : 31.6 L/min/ 5V
- Max. Permissible Input Signal Voltage : 39.5 L/min/ 6.25V
- Pres. Control :
- Max. Operating Pres : 21 mpA
- Min. Adj. Pres : 0.1 MPa
- Hysterisis : 1 % or less
- Repeatability : 1 % or less
- Input Signal Voltage : 17.5 MPa / 5V
- Max. Permissible Input Signal Voltage : 21 MPa
- AC. Servo Motor Specification :
- Rated Output : 4.5 kW
- Insulation Class : Class f
- Cooling System : Totally enclosed self cooling
- Ambient Temperature : 0 -+ 40C {no freezing}
- Ambient Humidity : 80
- Single Displacement type : 54 KG
- Dual Displacement type : 55 KG
- Applicable Controller Model Number : AMSR-*C-*00-10