Parker PD Series Variable Displacement Axial Piston Pump

Parker PD Series Variable Displacement Axial Piston Pump

Guangdong Haozheng Hydraulic Equipment Co., Ltd. specializes in manufacturing high-efficiency, reliable Parker PD series variable displacement axial piston pumps. Engineered specifically for the demanding requirements of open-circuit mobile hydraulic applications, the PD series features a robust swashplate design with a compact envelope size. It is globally recognized for its excellent self-priming speeds, quiet operation, and highly responsive modular controls that optimize power management in heavy-duty utility vehicles and construction machinery.

As an established international B2B hydraulic engineering manufacturer, Haozheng supplies complete PD pump assemblies and premium internal overhaul kits with 100% dimensional and functional interchangeability with original Parker Hannifin units [cite: Gemini Chat. Evidence: Direct identification of the company name while requesting SEO content and optimization for the website haozheng.ru. Date: 2026-05., Gmail. Evidence: Management of domain names and product listings for haozhenghydraulic.com and hydraulic-pumpparts.com. Date: 2024-11 to 2026-04.]. To withstand rapid load variations in rugged outdoor construction or transportation environments, every single unit undergoes strict dynamic volumetric profiling and seal integrity audits on our advanced hydraulic test benches before global dispatch.

Technical Parameters & Model Selection Guide

• Design Type: Swashplate design, variable displacement, mobile application optimized

• Circuit Application: Open Circuit

• Nominal Pressure: 280 Bar (28 MPa)

• Peak Pressure: Up to 320 Bar (32 MPa)

• Displacements Available: 18, 28, 45, 60, 75, 100, 140 cc/rev

• Control Code Matrix: Standard Pressure Limitation (P), Remote Pressure Control (M), Load Sensing (S), Torque Limiting Control (T)

High-Performance Flow for Truck Systems & Mobile Infrastructure

Thanks to its compact mounting profile and fast compensator response times, our Parker PD series replacement pumps maintain excellent efficiency across volatile mobile and utility sectors:

• Commercial Truck & Fleet Hydraulics : Delivering primary fluid power for heavy-duty dump trucks, refuse collection vehicles, concrete transit mixers, and truck-mounted cranes .

• Construction Machinery : Powering steering and auxiliary actuator loops in wheel loaders, motor graders, compact excavators, and trenching rigs.

• Material Handling Systems Operating heavy telescopic reach stackers , forklift high-pressure lifters, and mobile terminal cargo handling units.

• Agricultural Harvesting Gear: Driving auxiliary tools, attachment controls, and high-flow processing arrays in large crop harvesters and log-loading systems.

The Haozheng Advantage: Tight Tolerance Manufacturing & Mobile-Ready Reliability

Sourcing your mobile PD series pumps from Guangdong Haozheng Hydraulic Equipment Co., Ltd. secures a robust, friction-resistant component stream optimized for severe distribution environments:

• 100% Plug-And-Play Interchangeability: All mounting flanges, shaft dimensions, side/rear port locations, and control blocks align exactly with Parker standards, enabling instant field replacement without system pipe re-routing.

• Rigorous Dyno-Test Bench Profiling: Mobile machines experience severe pressure shocks. Every PD pump is fully calibrated on our electronic test benches to verify that its load-sensing margins and pressure-limiting curves are dialed in perfectly under continuous thermal load.

• Standard Sea-Freight Vacuum Insulation: To shield precision iron components from maritime salt corrosion and transit vibrations, all pumps are coated with thick anti-rust formulas, shrink-wrapped, and securely balanced inside standard export fumigation-free wooden cases.

• Rapid Lead Times via Active Core Stocking: We maintain an agile warehouse inventory of high-demand vehicle displacements (such as PD045, PD060, and PD075) with common SAE splines to drastically shorten emergency fleet downtime.

  Haozheng Hydraulic Production Processing Diagram

  

  Haozheng Hydraulic Honorary Certificate

  

  Exhibition

  

Frequently Asked Questions (FAQ)

Q1: What are the main benefits of using a Parker PD pump with a Load-Sensing (S) control setup in vehicle applications? A: Load-sensing controls act as an on-demand energy-saving mechanism. Instead of pushing a constant maximum flow that generates massive heat and wastes fuel when the vehicle’s actuators are idle, a load-sensing PD pump reads pressure signals from the control valve and automatically adjusts its swashplate angle to match the exact flow and pressure required by the current work cycle. This drastically reduces diesel fuel consumption and extends fluid service life.

Q2: Can a Parker PD pump be equipped with a through-drive (Thru-Drive) capability for tandem pump mounting? A: Yes, absolutely. The PD series features an optional rear through-drive adaptation pad (indicated in the model code structure). This allows maintenance shops or OEMs to easily mount a secondary smaller pump (such as a charge pump, fan-drive pump, or an external gear pump) directly onto the back of the primary PD pump, driving both from a single engine power take-off (PTO).

Q3: What causes localized pitting or noise on the valve plate of a PD pump operating at high speeds? A: This symptom is usually caused by fluid cavitation, which happens when the pump cannot pull hydraulic oil into the pistons fast enough, creating vapor bubbles that collapse violently under high pressure. To prevent this on high-speed truck systems, always ensure that the suction line hoses are entirely unkinked, that the reservoir air breather is completely unclogged, and that the fluid viscosity matches cold weather startup conditions.