Parker 47 Series - User Manual

Questions and Answers

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Jeffrey GarrettAug 17, 2025
What to do if my Parker Water Pump drive motor does not turn?
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  Stephen Barrett Jr.Aug 17, 2025
  If the drive motor of your Parker Water Pump isn't turning, it could be due to a few reasons. First, check the motor connections and the electrical power supply to ensure they are correctly connected and functioning. It's possible that one of the three phases has failed. If the motor connections and power supply are fine, the pump may be mechanically blocked, in which case you should send the pump to the factory for service.
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Denise BallAug 20, 2025
Why Parker Water Pump drive motor turns, but pump does not turn?
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  Nicole SloanAug 20, 2025
  If the drive motor of your Parker Water Pump is turning but the pump itself isn't, the coupling might not be mounted correctly. Check the coupling assembly and correct it.
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Luis WilliamsAug 25, 2025
What to do if Parker 47 Series drive motor turns and pump turns, but there is no output?
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  Christopher JohnsonAug 25, 2025
  If the drive motor and pump of your Parker Water Pump are both turning, but there's no output, consider these possibilities: Ensure the direction of motor rotation is correct by changing it if necessary. Check that the fluid reservoir is filled to the required level and increase the suction pipe length if needed. Inspect the suction line for blockages and open any valves in the line, ensuring they have electrical indicators. Also, check the suction filter. Seal the suction line to prevent air from entering. Unload the pressure port and system before starting, and bleed air from the pressure line if the pressure line/system cannot bleed air out.
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Kelly BryantAug 28, 2025
How to fix unstable compensator on Parker 47 Series Water Pump?
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  Heather RandallAug 28, 2025
  To address an unstable compensator in your Parker Water Pump, consider these steps: First, clean the hydraulic system and compensator valve, as the compensator spool might be sticking due to hydraulic fluid contamination. Next, adjust the compensator differential pressure to the required setting, as it may have changed (becoming too low or too high). Ensure the correct pilot orifice and pressure pilot valve are selected as recommended. If dealing with a dynamic critical system, such as a pressure compensator combined with a pressure reducing valve, use a remote pressure compensator instead of a standard one, and install an orifice in the load sensing line remote from the compensator, as close as possible to the load sensing valve.
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Grant LopezAug 31, 2025
What to do if Parker 47 Series Water Pump does not compensate?
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  elopezSep 1, 2025
  If your Parker Water Pump isn't compensating, check these potential issues: Ensure there is an orifice Ø 0.8 mm in the load sensing line to compensator code MFC. Verify that a pressure pilot valve is connected to the compensator and that the valve opens as required. Confirm that the load sensing line is connected downstream (actuator side) of the load sensing valve. Also, ensure that the pump outlet pressure is at least 15 bar, as the bias spring in the pump cannot be compressed otherwise.
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fullerbrianSep 4, 2025
Why Parker 47 Series Water Pump drive motor only turns at slow speed?
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  Craig Taylor DDSSep 4, 2025
  If the drive motor of your Parker Water Pump only turns at slow speed, it could be due to improper motor selection or a hydraulically blocked pump. Start the pump at an unloaded system and consider using a motor with more horsepower. Also, check the function of the pump compensator and start the pump at an unloaded system.
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Nathaniel HowardSep 8, 2025
What to do if Parker Water Pump does not upstroke?
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  Emily MartinezSep 8, 2025
  If your Parker Water Pump does not upstroke and sticks at zero displacement, it could be due to a blocked compensator or an interrupted cable. Clean the hydraulic fluid and compensator valve, as the compensator might be blocked due to contamination. Check the wiring to the LVDT or proportional solenoid to ensure the cable is intact; replace it if necessary.
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Michael MorenoNov 12, 2025
What to do if Parker 47 Series delivers full flow at low pressure?
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  Kathy AllenNov 12, 2025
  If your Parker Water Pump delivers full flow at low pressure, several issues could be the cause. The standard pressure compensator might be set to minimum pressure, so you should adjust the compensator setting to the desired pressure. Alternatively, the orifice in the remote pressure compensator could be blocked, so ensure the orifice Ø 0.8 mm in the control spool is free and open. Other potential causes include: a missing pressure pilot valve connected to port P. R (install a suitable pressure pilot valve and adjust it); an unenergized multiple pressure pilot selector valve (energize the selector valve solenoid); a missing load sensing line (connect the system load sensing port to the compensator); a closed or too small load sensing valve (open the load sensing valve or use a larger valve...