P1075BM505075 Parker P1 Series Piston Pump 75cc 280bar

Product Overview

The P1075BM505075 is a Parker Hannifin P1/PD Series medium-pressure open-circuit variable displacement axial piston pump with a nominal displacement of 75 cm³/rev (4.58 in³/rev), rated continuous operating pressure of 280 bar (4060 psi), intermittent pressure of 320 bar (4500 psi), and peak pressure capability of 350 bar (5000 psi). The pump employs a swashplate-type axial piston variable mechanism, specifically designed for open-circuit medium-pressure applications, combining compact construction, low-noise operation, and high volumetric efficiency — an ideal power source for industrial and mobile hydraulic systems.

The P1/PD Series features exceptional modular control design, offering pressure limiter (PS01), load sensing (PS02), and constant horsepower control options, with optional minimum and maximum displacement adjustment mechanisms. The pump features SAE and ISO standard mounting flanges and ports, long-life tapered roller shaft bearings, and hydrostatically balanced swashplate saddle bearings, ensuring long-term reliable operation under high-load conditions. Full power through-drive capability enables tandem connection of multiple pumps for compact multi-circuit integration.

The P1075BM505075 is fully compatible with Parker P1075 and PD075 series products, with mounting interfaces, shaft specifications, and port layouts identical to original Parker products, enabling 100% plug-and-play drop-in replacement. The series is Parker’s classic medium-pressure piston pump platform, widely deployed in tractors, combine harvesters, forestry harvesters, construction machinery, and industrial hydraulic power units.

Every P1075BM505075 undergoes 100% simulated duty-cycle testing prior to shipment — covering pressure holding, flow output, control response, and internal leakage — ensuring complete drop-in interchangeability with original Parker pumps without installation or plumbing modifications.

Technical Specifications

• Model: P1075BM505075

• Brand: Parker Hannifin

• Series: P1/PD Series medium-pressure open-circuit variable piston pump

• Pump Type: Swashplate axial piston variable displacement pump

• Nominal Displacement: 75 cm³/rev (4.58 in³/rev)

• Rated Continuous Operating Pressure: 280 bar (4060 psi)

• Intermittent Operating Pressure: 320 bar (4500 psi)

• Peak Pressure: 350 bar (5000 psi)

• Maximum Speed (1.0 bar abs inlet): 1800 rpm

• Maximum Speed (0.8 bar abs inlet): 1800 rpm

• Control Type: Pressure limiter / Load sensing (multiple control options available)

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

• Mounting Flange: SAE standard flange (2-bolt)

• Shaft Type: SAE splined shaft

• Seals: NBR (Nitrile), FKM option available

• Housing Material: High-strength nodular iron

• Weight: Approx. 31 kg (68 lbs)

• Inlet Absolute Pressure: 0.8 bar (minimum at 1800 rpm)

• Fluid Cleanliness Requirement: ISO 20/18/14

• Recommended Fluid: ISO VG32 / VG46 anti-wear hydraulic oil

• Operating Temperature Range: -10 to +80 ℃

• Through-Drive Capability: Yes, 100% torque transmission

P1/PD Series Same-Family Displacement Reference (nominal conditions):

• P1045 / PD045: 45 cm³/rev (2.75 in³/rev), 280 bar rated, 350 bar peak, max 2100 rpm

• P1060 / PD060: 60 cm³/rev (3.66 in³/rev), 280 bar rated, 350 bar peak, max 1800 rpm

• P1075 / PD075: 75 cm³/rev (4.58 in³/rev), 280 bar rated, 350 bar peak, max 1800 rpm

• P1100 / PD100: 100 cm³/rev (6.01 in³/rev), 280 bar rated, 350 bar peak, max 1800 rpm

• P1140 / PD140: 140 cm³/rev (8.54 in³/rev), 280 bar rated, 350 bar peak, max 1800 rpm

Data based on Parker P1/PD Series technical specifications.

Key Technical Advantages

1. 280 bar Medium-Pressure Efficient Operation — Wide Operating Range Adaptability

The P1075BM505075 maintains high efficiency at 280 bar rated continuous pressure, with 320 bar intermittent and 350 bar peak pressure capability, leading among comparable medium-pressure piston pumps in power density. The 75 cm³/rev displacement combined with 1800 rpm maximum speed delivers flow output meeting the demands of mobile and industrial hydraulic systems. The pump employs hydrostatically balanced swashplate saddle bearings to effectively distribute loads and reduce friction losses, combined with optimized valve plate flow passages for high operating efficiency and low heat generation.

2. Low Noise and Low Flow Ripple — Precision Engineering Control

The P1/PD Series is designed with low-noise operation as a core objective, effectively suppressing pressure pulsation and fluid-borne noise through optimized valve plate flow passages and precision-machined rotary group. Low flow ripple characteristics further reduce system piping noise, making the pump particularly suitable for indoor industrial environments and precision mobile equipment with stringent acoustic requirements. Elastomer seals replace traditional gasket seals, eliminating external leakage while simplifying maintenance operations.

3. High-Reliability Bearings and Hydrostatic Balance Design

The pump features long-life tapered roller shaft bearing load design, capable of withstanding axial and radial loads, ensuring long-term stable operation under harsh conditions. Low-friction, hydrostatically balanced swashplate saddle bearings significantly reduce friction losses and heat generation, extending overhaul intervals. The high-strength nodular iron housing delivers superior impact and deformation resistance, suitable for vibration-prone operating environments in construction and forestry machinery.

4. Modular Control and Through-Drive — Flexible System Integration

The P1/PD Series offers multiple control options including pressure limiter (PS01) and load sensing (PS02), with the same pump body adaptable to different control covers for flexible system design selection. Optional minimum and maximum displacement adjustment mechanisms meet precise flow control requirements. Full power through-drive capability supports tandem installation of same-series pumps or gear pumps for compact integration of multi-circuit hydraulic systems. SAE and ISO standard mounting flanges and ports simplify system plumbing layout.

5. 100% Drop-in Interchangeability — Direct Replacement for Parker PD075/P1075

The P1075BM505075 features mounting flange, SAE splined shaft, and port layouts identical to Parker PD075/P1075, enabling 100% drop-in interchangeability. The pre-calibrated control valve blocks align perfectly with Parker OEM response limits, eliminating pressure spikes, system oscillations, and diesel engine lugging. For equipment currently using Parker P1075 or PD075 series pumps, direct replacement installation is possible without modifying mounting interfaces or plumbing layouts.

Application Areas

• Agricultural Machinery: Tractor hydraulic hitch systems, combine harvester hydraulic drives, irrigation system hydraulic power sources

• Forestry Harvesters: Hydraulic power systems for harvesters and forwarders, with high-strength nodular iron housing suited to vibration-prone conditions

• Construction Machinery: Auxiliary hydraulic circuits for medium excavators, loaders, and telehandlers

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

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

• Industrial Hydraulic Power Units: Machine tool clamping systems and small hydraulic press power sources, with low noise suited to indoor environments

• Material Handling Equipment: Hydraulic power units for medium forklifts and pallet trucks

The P1075BM505075 is ideally suited for medium-pressure hydraulic systems requiring 280 bar continuous working pressure and displacements in the 60–100 cm³/rev range — the classic configuration for mobile and industrial hydraulic equipment.

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 P1075BM505075 features an SAE standard mounting flange and splined 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.

2. Pre-Start Priming Procedure

Before initial startup, the pump must be slowly filled through the case drain port with clean hydraulic oil to ensure adequate lubrication, cooling, and sealing during startup. The pump supports horizontal or vertical (shaft-up) mounting; the case drain port should be selected based on the mounting orientation to ensure the case remains full of fluid at all times. 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, check piping and component tightness, then gradually increase to rated pressure.

3. Fluid Cleanliness and Filtration

The P1/PD Series requires fluid cleanliness of ISO 20/18/14. 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. Install a breather filter with filtration accuracy ≤10 μm on the reservoir and regularly check oil level and fluid condition. Maintain inlet absolute pressure above 0.8 bar to ensure adequate suction.

4. Controller Commissioning and System Integration

The P1/PD Series is available with pressure limiter (PS01) or load sensing (PS02) control. The pressure limiter setting should be at least 10–15 bar below the system relief valve setting. The load sensing differential pressure setting is typically 1.5–2.0 MPa. During commissioning, first turn the control setting screw to the lowest pressure position, then gradually increase to the target pressure. Adjustment must be performed with the pump at full displacement and low operating pressure to avoid system pressure oscillation. Optional minimum/maximum displacement adjustment mechanisms allow precise limitation of pump displacement range.

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 splined shaft and drive coupling engagement during operation, ensuring sufficient spline engagement length to prevent spline wear.