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Parker P1/PD Series - User Manual

Parker P1/PD Series
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P1/PD Series: B-Mod Service Information
Medium Pressure Axial Piston Pumps
Bulletin HY28
-
2708
-
02/SVC/EN
Effective: July 2019 Replaces: March 29, 2019

Table of Contents

Questions and Answers

  • C
    Colleen BrownAug 10, 2025
    How to fix a noisy Parker P1/PD?
    • A
      angela11Aug 11, 2025
      A noisy Parker Water Pump can be caused by air in the fluid or cavitation in the rotating group. If air is the issue, check for leaks in the inlet line, ensure the fluid level isn't low, avoid turbulent fluid, ensure return lines are not above the fluid level, check for gas leaks from the accumulator, avoid excessive pressure drop in the inlet line from a pressurized reservoir, and ensure the inlet line strainer isn't acting as an air trap. If cavitation is the problem, the fluid might be too cold, viscous, or heavy; the shaft speed might be too high; or the inlet line or strainer might be too small or dirty. Also, consider if the operating altitude is too high or the inlet pressure is too low. Misaligned shaft, mechanical fault in pump can also be the cause.
  • C
    Cody QuinnAug 23, 2025
    Why is the fluid heating up in my Parker Water Pump?
    • D
      Dustin HammondAug 23, 2025
      Fluid heating in a Parker Water Pump can stem from excessive pump leakage, relief valve issues, compensator problems, an oversized pump, heat exchanger malfunctions, or reservoir issues. Address excessive pump leakage by rechecking the case drain flow and repairing as necessary, and ensuring the fluid isn't too thin. Check that the relief valve isn't set too low and isn't experiencing instability, and that the compensator isn't set too high or has worn parts. If the pump is too large, select a smaller displacement. For heat exchanger problems, ensure water is flowing correctly and is not too hot, the fan isn't clogged, and the exchanger is free of deposits. Finally, ensure the reservoir has enough fluid, proper baffles, and isn't insulated or picking up heat from other equipment.
  • G
    grantmauriceAug 29, 2025
    What to do if the compensator is unstable in my Parker P1/PD Water Pump?
    • T
      Tammy SmithAug 29, 2025
      Compensator instability in a Parker Water Pump can arise from line capacitance or an outlet port check valve. To address line capacitance (related to line volume, line stretch, and accumulator effects), try changing line sizes or lengths, adding or removing hose, adding an orifice in the load sense line, or increasing load sense differential pressure. If the issue is the outlet port check valve, relocate it further from the outlet port.
  • A
    Anthony LindseySep 3, 2025
    What causes pressure shocks in a Parker Water Pump?
    • C
      Carrie StewartSep 3, 2025
      Pressure shocks in a Parker Water Pump can be caused by a cogging load, a worn relief valve, a worn compensator, slow response in check valves, excessive decompression energy rates or barrel blow-off. Mechanical considerations should be taken into account for cogging load. If the relief valve is worn repairs are needed. If the compensator is worn, replace it. If check valves are responding slowly, replace or relocate them. To address excessive decompression energy rates, improve decompression control. If there is barrel blow-off, the rotating group is worn, excessive case pressure.
  • E
    ewaltersNov 15, 2025
    Why is there high wear in my Parker P1/PD Water Pump?
    • J
      Jason GonzalesNov 15, 2025
      High wear in a Parker Water Pump can be attributed to excessive loads, contaminant particles in the fluid, improper fluid, improper repair, or unwanted water in the fluid. To address excessive loads, reduce pressure settings and speeds. For contaminant particles, ensure proper filter maintenance, use filters that aren't too coarse, prevent the introduction of dirty fluid, and maintain reservoir openings and breathers properly. If the issue is improper fluid, ensure it's neither too thin nor too thick for the operating temperature, watch out for fluid breakdown, avoid incorrect additives, and be aware of chemical aging. For improper repairs, use correct parts and procedures. To combat unwanted water, address condensation, faulty breathers/strainers, heat exchanger leakage, faulty cleanup pr...

Parker P1/PD Series Specifications

General IconGeneral
BrandParker
ModelP1/PD Series
CategoryWater Pump
LanguageEnglish

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