Parker PV Series User Manual

Parker PV Series

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Bulletin MSG30-3254-INST/UK

Installation and setup

manual

Electro-hydraulic control

for serie PVplus

Pump design series 44-45-46-47,

compensator design series 45

Eective: July 1st, 2021

Supersedes: March 1st, 2017

Visit our homepage

for additional support

parker.com/pmde

Table of Contents

Questions and Answers:

G
Gina TrevinoAug 14, 2025
What to do if Parker PV Water Pump drive motor turns and pump turns, but there is no output?
- A
  asummersAug 14, 2025
  If the drive motor and pump are turning, but there's no output, consider these potential causes and solutions: * **Wrong direction of rotation:** Change the direction of motor rotation. * **Fluid reservoir issue:** Fill the reservoir to the required level or increase the suction pipe length if the suction line ends above the fluid level. * **Blocked suction line:** Check the suction line for free flow, open any valves in the suction line (valves should have an electrical indicator), and check the suction filter. * **Suction line leak:** Seal the suction line to prevent air from entering. * **Air in pressure line:** Unload the pressure port, unload the system before starting, and bleed air from the pressure line.
J
Jack GuerraAug 17, 2025
What to do if Parker PV does not build up pressure, but delivers full flow at low pressure?
- R
  Robert PerezAug 17, 2025
  If your Parker Water Pump delivers full flow at low pressure but doesn't build up pressure, here's what you can check: * **Pressure compensator setting:** Adjust the compensator setting to the desired pressure if it's set to minimum. * **Pressure pilot valve:** Install a suitable pressure pilot valve and adjust it to the desired setting if none is connected. * **Multiple pressure pilot selector valve:** Energize the selector valve solenoid if the pump works in stand-by because the valve is not energized. * **Differential pressure:** Check the differential pressure adjustment and correct it if it's too low.
J
John LawsonAug 25, 2025
What to do if Parker PV Water Pump delivers no output flow?
- J
  James TaylorAug 26, 2025
  If your Parker Water Pump delivers no output flow, here are a couple of things to check: * **Motor connections:** Verify the motor connections and check the electrical power supply, as the motor might not be connected correctly or one of the three phases may have failed. * **Mechanical blockage:** If the pump is mechanically blocked, send it to the factory for service.
N
nguyendanielleAug 29, 2025
Why Parker PV does not compensate?
- K
  Karen ReedAug 29, 2025
  If your Parker Water Pump does not compensate, here are a couple of things to check: * **Pressure pilot valve:** Connect a pressure pilot valve to the compensator, ensuring the valve opens as required, if no valve is connected or if the valve is blocked. * **Pump outlet pressure:** Ensure the pump outlet pressure is at least 15 bar, as the bias spring in the pump cannot be compressed otherwise.
T
Timothy BrownSep 2, 2025
What to do if Parker PV drive motor only turns at slow speed?
- S
  Samantha WardSep 2, 2025
  If the drive motor of your Parker Water Pump only turns at slow speed, consider the following: * **Motor selection:** Use a motor with more horsepower if the current motor is not selected properly. * **Hydraulic blockage:** Check the function of the pump compensator and start the pump at an unloaded system if the pump is hydraulically blocked.
D
David CampbellSep 5, 2025
What to do if Parker Water Pump does not upstroke, sticks at zero displacement?
- A
  amandahullSep 5, 2025
  If your Parker Water Pump does not upstroke and sticks at zero displacement, consider these potential causes: * **Contamination:** The compensator may be blocked due to contamination. Clean the hydraulic fluid and the compensator valve. * **Wiring issue:** The cable to the LVDT or proportional solenoid may be interrupted. Check the wiring and replace the cable if necessary.
J
jmoranSep 9, 2025
What to do if Parker PV Water Pump drive motor turns, but the pump does not turn?
- S
  Samantha SandersSep 9, 2025
  If the drive motor of your Parker Water Pump turns, but the pump itself does not, check the coupling assembly and correct it, as it might not be mounted correctly.

Parker PV Series Specifications

General

Brand	Parker
Model	PV Series
Category	Water Pump
Language	English

Summary

1. Table of available electro hydraulical controls

2. Proportional displacement control, code ...FDV (old: FPV)

FDV Function description

Describes how the FDV control adjusts pump displacement based on input.

3. Proportional displacement control with pressure compensation, codes ...UDR, ...UDK (old: UPR, UPK)

Figure 5: Hydraulic Circuit of the ...UDR, ...UDK control

Displays the hydraulic circuit for UDR/UDK controls.

4. Proportional displacement control with closed loop pressure control, code ...UDM (old: UPM)

Figure 6: Hydraulic Circuit of ...UDM control

Shows the hydraulic circuit for UDM control.

Figure 7: Pressures vs input signal

Illustrates pressure vs input signal behavior.

5. Preload valve for proportional controlled pumps, code PVAPVV...

Figure 8: Hydraulic circuit of a pump with ...UDK with preload valve control

Shows the hydraulic circuit with preload valve.

Figure 9: Outside view of the preload manifold for direct pump mounting. Outlet optional to front (shaft side) or to the rear

Shows the preload manifold's external view and mounting options.

Table 1: Main dimensions - preload manifold

Lists main dimensions of the preload manifold.

6. External pilot pressure supply

Figure 10: Hydraulic circuit of a pump with external pilot pressure supply

Displays the hydraulic circuit for external pilot pressure supply.

7. Quick pressure relief with quick unload valve, code R5V* in combination with controls codes ...UDS resp. UDQ

Figure 11: Hydraulic circuit of the ...UDS control with quick unload valve

Shows the hydraulic circuit for UDS control with unload valve.

8. Preload and quick unload manifold PVAPVE* in combination with compensator codes ...UDP resp. ...UDF

Figure 12: Hydraulic circuit of the ...UDP control with pre-load and quick unload manifold

Illustrates the hydraulic circuit for UDP control.

Figure 13 Preload and quick unload manifold

Shows the preload and quick unload manifold.

Table 3: Main dimensions of the preload and quick unload manifold

Lists main dimensions of the preload/unload manifold.

9.1 Basic adjustment of CIP sensor

Teach Process

Describes the teach process for the sensor.

Figure 14: Hydraulic scheme for pump in 0% displacement

Shows hydraulic scheme for zero displacement.

9.2 Basic adjustment LVDT

Table 4: setting dimensions LVDT core

Lists setting dimensions for LVDT core.

Figure 16: Setting dimension A for LVDT armature

Shows setting dimension A for LVDT armature.

MAX-adjustment:

Details the maximum adjustment procedure for displacement.

Zero adjustment:

Explains the zero adjustment procedure for the LVDT.

Figure 17: linductive positon transducer (LVDT), outside view

Shows the LVDT transducer's external view.

9.3 Basic adjustment control valves

Figure 18: Proportional p-Q-control

Illustrates proportional p-Q control.

10. Connecting diagram for proportional displacement control; Code ...FDV.

Figure 20: Displacement control valve, Code PVCMD1FBD**

Shows the displacement control valve diagram.

11. Connecting diagram for p/Q-control; Codes ..UDR, ...UDK, ...UDM, ...UDS, ...UDQ, ... UDP and ...UDF.

12. Cables and connections

Cable 1 from CIP and LVDT (displacement transducer)

Describes cables for CIP and LVDT.

Cable 2 from pressure sensor (compensator codes ...UPM, ...UPF, ...UPQ)

Describes cables for pressure sensors.

Cable 3 a/b to displacement control valve (displacement control)

Details cables for displacement control valve.

Cable 4 to proportional pressure pilot valve solenoid (not for compensator code ...FDV, ...UDR, ...UDP, ...UDS [old: ...FPV, ...UPR, ...UPP, ...UPS])

Describes cables for pressure pilot valve solenoid.

13 Trouble shooting guide

Pump delivers no output flow

Troubleshooting no output flow from the pump.

Drive motor does not turn

Diagnosing issues when the drive motor doesn't turn.

Drive motor only turns at slow speed

Troubleshooting slow drive motor speed.

Drive motor turns, pump does not turn

Issues when the motor turns but the pump doesn't.

Drive motor turns and pump turns

Common issues when both motor and pump turn.

Pump does not build up pressure, but delivers full flow at low pressure

Problems with pressure build-up and full flow.

Pump does not compensate

Troubleshooting pump compensation issues.

Pump does not upstroke, sticks at zero displacement.

Issues with pump upstroke and zero displacement.

Compensator is unstable

Diagnosing and resolving compensator instability.

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