PD045PB04SRS5AL00R120PB00 Parker P1/PD Pump 45cc 280bar

Product Overview

The Parker P1/PD Series is Parker Hannifin’s medium-pressure open-circuit variable displacement axial piston pump platform, covering 7 displacement sizes from 18 to 140 cm³/rev with continuous working pressure up to 280 bar (4060 psi), intermittent pressure of 320 bar (4640 psi), and peak pressure capability of 350 bar (5075 psi). The series is available in two versions: P1 for the mobile market with high drive speed capability (up to 3500 rpm), and PD for the industrial market featuring a low-noise nine-piston design with maximum noise level of only 83 dBA and unique “ripple chamber” technology to reduce pressure pulsations and further decrease noise.

The specific model PD018PB04SRS5AL00R120PB00 is an 18 cm³/rev displacement configuration with 280 bar continuous pressure, up to 350 bar intermittent pressure, operating temperature range of -40°C to +95°C, and full-stroke speed range of 2900–3500 rpm. The model code decodes as follows: “PD” denotes industrial low-noise version; “018” specifies nominal displacement of 18 cm³/rev; “PB04” specifies mounting flange and shaft configuration (SAE B two-bolt flange); “SRS5” specifies port orientation and position; “AL00” specifies control option (load sensing + pressure limiter); “R120” specifies rotation direction and displacement limiter configuration; “PB00” specifies seal material and additional option codes. The mobile version equivalent is P1018.

The core engineering features of the P1/PD Series include high-strength cast iron housing with compact overall dimensions, high power density, long-life tapered roller shaft bearings, hydrostatically balanced swashplate saddle bearings, elastomer seals replacing gaskets to eliminate external leakage, SAE and ISO standard mounting flanges and ports, full power through-drive capability, multiple case drain ports for various mounting orientations, optional minimum and maximum displacement adjustments, and modular controls for easy conversions.

The series is widely deployed in concrete pump trucks, excavator auxiliary systems, forklifts, skid steer loaders, tractors, municipal vehicles, industrial hydraulic power units, injection molding machine auxiliary circuits, and material handling equipment. In market applications, the series is commonly cross-referenced against Bosch Rexroth A10VSO series and Eaton PVH series.

Every P1/PD Series pump undergoes 100% simulated duty-cycle testing prior to shipment — covering pressure holding, flow output, compensator response, and internal leakage — ensuring complete drop-in interchangeability with original Parker pumps without installation or plumbing modifications.

Technical Specifications

P1/PD Series Individual Displacement Technical Data (nominal conditions, 280 bar continuous):

• P1/PD 018: 18 cm³/rev (1.10 in³/rev), 280 bar continuous, 320 bar intermittent, 350 bar peak, P1 max 3500 rpm (at 1.3 bar inlet), PD max 1800 rpm, min 600 rpm

• P1/PD 028: 28 cm³/rev (1.71 in³/rev), 280 bar continuous, 320 bar intermittent, 350 bar peak, P1 max 3400 rpm, PD max 1800 rpm

• P1/PD 045: 45 cm³/rev (2.75 in³/rev), 280 bar continuous, 320 bar intermittent, 350 bar peak, P1 max 3100 rpm, PD max 1800 rpm

• P1/PD 060: 60 cm³/rev (3.66 in³/rev), 280 bar continuous, 320 bar intermittent, 350 bar peak, P1 max 2800 rpm, PD max 1800 rpm

• P1/PD 075: 75 cm³/rev (4.58 in³/rev), 280 bar continuous, 320 bar intermittent, 350 bar peak, P1 max 2700 rpm, PD max 1800 rpm

• P1/PD 100: 100 cm³/rev (6.01 in³/rev), 280 bar continuous, 320 bar intermittent, 350 bar peak, P1 max 2500 rpm, PD max 1800 rpm

• P1/PD 140: 140 cm³/rev (8.54 in³/rev), 280 bar continuous, 320 bar intermittent, 350 bar peak, P1 max 2400 rpm, PD max 1800 rpm

PD018PB04SRS5AL00R120PB00 Detailed Specifications:

• Model: PD018PB04SRS5AL00R120PB00

• Brand: Parker Hannifin

• Series: P1/PD Series

• Pump Type: Open-circuit variable displacement axial piston pump (industrial low-noise version)

• Nominal Displacement: 18 cm³/rev (1.10 in³/rev)

• Continuous Working Pressure: 280 bar (4060 psi)

• Intermittent Working Pressure: 320 bar (4640 psi)

• Peak Pressure: 350 bar (5075 psi)

• Full-Stroke Speed Range: 2900–3500 rpm (P1 version), PD version max 1800 rpm

• Minimum Speed: 600 rpm

• Control Type: AL00 (load sensing + pressure limiter)

• Direction of Rotation: Right-hand (viewed from shaft end)

• Mounting Flange: SAE B two-bolt flange

• Shaft Type: SAE B keyed shaft

• Through-Drive Capability: Yes, full power torque transmission

• Seals: NBR (Nitrile), elastomer seals eliminating gaskets and external leakage

• Housing Material: High-strength cast iron

• Fluid Temperature Range: -40°C to +95°C

• Inlet Pressure Range: Rated 1.0 bar abs, minimum 0.8 bar abs, maximum 11 bar abs

• Case Pressure (Peak): ≤4.0 bar abs and less than 0.5 bar above inlet pressure

• Case Pressure (Rated): ≤2.0 bar abs

• Fluid Cleanliness Requirement: ISO 18/16/13 or better

• Maximum Noise Level: 83 dBA (PD industrial version)

• Piston Count: 9 (low-noise design)

P1/PD Series Control Options:

• C0 (Pressure Limiter Control): Limits maximum system pressure, adjustment range 26–280 bar

• L0 / L2 (Load Sensing + Pressure Limiter): Matches pump flow and pressure to system demands, L2 version differential pressure range 10–30 bar

• AM (Remote Operated Pressure Limiter): Remote adjustment of pressure compensator setting

• AMT / ANT / L0T (Torque Limiting Controls): Pressure limiting combined with torque limiting

• AE / AF (Electronic Proportional Pressure Limiting): Proportional relief valve for pressure adjustment, 12V/24V options

• C03 / C06 / L03 / L06 (Electronic Unload/Cold Start): Unload function reduces cold start torque

Key Technical Advantages

1. Compact Lightweight Design and High Power Density — Optimal Solution for Limited Installation Space

The P1/PD Series is designed with compact overall dimensions and high power density as core objectives, employing a high-strength cast iron housing and optimized rotary group to achieve exceptional power-to-weight ratio across the 18–140 cm³/rev displacement range. The PD018PB04SRS5AL00R120PB00 delivers 280 bar continuous working pressure at 18 cm³/rev displacement, with compact structural dimensions enabling easy integration into excavators, skid steer loaders, and other mobile machinery with limited installation space. Optional minimum and maximum displacement adjustment mechanisms allow precise limitation of pump displacement range for systems requiring precise flow control.

2. Nine-Piston Low-Noise Design with Ripple Chamber Technology — 83 dBA Quiet Operation

The PD industrial version employs Parker’s proprietary nine-piston low-noise design with maximum noise level of only 83 dBA, and utilizes unique “ripple chamber” technology to effectively reduce pressure pulsations and further decrease system noise. This design significantly reduces pressure pulsation amplitude and fluid-borne noise propagation through optimized piston count and valve plate flow passage parameters. For injection molding workshops, precision machine tools, and other indoor industrial environments with stringent acoustic requirements, the PD version offers significant acoustic advantages, helping to improve working environments and meet noise regulation requirements.

3. Elastomer Seals and Long-Life Bearing System — Leak-Free, High-Reliability Operation

The P1/PD Series employs elastomer seals replacing traditional gaskets, completely eliminating external leakage while simplifying seal maintenance operations. The pump features long-life tapered roller shaft bearings and low-friction hydrostatically balanced swashplate saddle bearings, effectively distributing loads and minimizing wear. This bearing system is precision-designed and material-optimized to ensure exceptional durability and operational reliability at 280 bar continuous working pressure, significantly extending overhaul intervals. The full series offers wide oil viscosity adaptability suitable for various industrial hydraulic system operating conditions.

4. Full Power Through-Drive and Modular Controls — Flexible System Integration

The P1/PD Series supports full power through-drive capability, enabling tandem installation of same-series pumps or gear pumps on the rear of the main pump for compact system configurations driven by a single prime mover. The pump offers multiple case drain ports for various mounting orientations, simplifying plumbing layout. Modular controller design supports rapid field conversion and replacement, with C, L, and AM control options sharing a universal control housing, significantly reducing downtime. Optional torque limiters and electronic proportional pressure limiting controls meet diverse requirements from simple pressure limiting to complex load sensing and power management.

5. Exceptional Field Interchangeability and Broad Media Compatibility

The P1/PD Series features SAE and ISO standard mounting flanges and port layouts ensuring 100% drop-in interchangeability with original Parker pumps without modifying mounting interfaces or plumbing layouts. The series covers a wide displacement range of 18–140 cm³/rev within a shared mounting flange system, offering multiple control options (C0, L0, L2, AM, AMT, ANT, AE, AF, etc.) for flexible selection in system design and equipment maintenance. Elastomer seals are compatible with mineral-based hydraulic oil and most industrial hydraulic media, with operating temperature range of -40°C to +95°C, meeting various outdoor working environments from cold winters to hot summers.

Application Areas

• Concrete Pump Trucks: Pumping system auxiliary hydraulic circuits, with compact size and high power density meeting vehicle-mounted installation requirements

• Excavators: Small excavator auxiliary hydraulic systems, with load sensing control enabling on-demand flow supply

• Skid Steer Loaders: Travel drive auxiliary circuits and work equipment hydraulic systems

• Forklifts: Travel drive and lift hydraulic system power sources

• Tractors: Hydraulic hitch and auxiliary hydraulic circuits, with high-speed capability matching engine drives

• Municipal Vehicles: Sweeper and snow removal vehicle working device hydraulic drive systems

• Aerial Work Platforms: Scissor lift and boom lift hydraulic power units

• Industrial Hydraulic Power Units: Injection molding machine auxiliary circuits, die-casting machine auxiliary systems, machine tool hydraulic power units

• Material Handling Equipment: Medium forklift and telehandler hydraulic power units

The P1/PD Series is ideally suited for mobile and industrial medium-pressure hydraulic systems requiring 280 bar continuous working pressure and displacements in the 18–45 cm³/rev range — the classic configuration for concrete pump truck auxiliary circuits and industrial hydraulic power units. In selection, the P1/PD Series is commonly cross-referenced against Bosch Rexroth A10VSO series and Eaton PVH series.

Expert Maintenance Tips

1. Shaft Alignment and Coupling Requirements

Maintain concentricity between the pump shaft and drive shaft within 0.05 mm. Flexible couplings are strongly recommended to accommodate minor angular misalignment. The P1/PD Series features SAE B two-bolt mounting flange and SAE B keyed shaft — never strike the shaft end during installation to avoid damaging internal seals and bearings. Tighten mounting flange bolts in diagonal sequence to the specified torque. Couplings must be equipped with protective guards. Motor-to-pump shaft alignment should be checked after installation and again after 500 hours of operation.

2. Pre-Start Priming Procedure (Mandatory)

Before initial startup, the pump must be slowly filled through the case drain port with clean hydraulic oil. Operating an axial piston pump dry — even for a few seconds — will score the swashplate, valve plate, and piston slippers, causing immediate total pressure loss and irreversible damage. P1/PD Series pumps feature a standard air bleed valve for quick priming. Start the pump in jog mode until the pump and piping are sufficiently filled and vented. After complete venting, run at low pressure for 5–10 minutes, then gradually increase to rated pressure.

3. Controller Commissioning and System Integration

The AL00 load sensing + pressure limiter controller commissioning should separately set the load sensing differential and pressure limiting value. The pressure limiter setting should be at least 10–15 bar below the system relief valve setting. The L2 version load sensing differential pressure adjustment range is 10–30 bar. During commissioning, first turn the pressure setting screw to the lowest pressure position, then gradually increase to the target pressure. Modular controllers support rapid field replacement without pump disassembly.

4. Fluid Cleanliness and Filtration

The P1/PD Series requires fluid cleanliness of ISO 18/16/13 or better. Use pressure line filters with a filtration ratio β10 ≥ 75 (per ISO 4572). Avoid suction filters, which increase suction resistance and cavitation risk; if essential, use with a vacuum switch monitor. The case drain line should be independently routed to the reservoir. Case pressure must not exceed 2 bar abs (rated) or 4 bar abs (peak) and must not exceed inlet pressure by more than 0.5 bar. ISO VG32 or VG46 anti-wear hydraulic oil is recommended.

5. Restart Procedure After Extended Shutdown

If the pump has been idle for more than 30 days, manually rotate the shaft several turns to verify free rotation before restarting. Check for abnormal leakage at the case drain port. After startup, operate at low pressure for 10–15 minutes until oil temperature reaches normal operating range before applying full load. Regularly inspect the keyed shaft engagement with the drive coupling, ensuring sufficient keyway engagement length. When using torque limiter control options, periodically verify torque setting accuracy.