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Vickers Variable Piston Pump PVXS-066-M-R-DF-0000 Instruction Manual

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1. Product Overview

The EATON VICKERS PVXS-066-M-R-DF-0000 is an open-loop variable displacement axial piston pump, designed for high-pressure industrial applications. With its robust swashplate design, this pump delivers reliable performance, long service life, and excellent responsiveness, making it suitable for use in medium-sized construction machinery, agricultural equipment, hydraulic systems of light and heavy industry, and other fields requiring stable and efficient hydraulic power supply. The model features flexible displacement adjustment, compact structure, and strong adaptability to harsh working environments, ensuring optimal operation under various load conditions.

2.VICKERS Variable Displacement Piston Pump

Technical Specifications

Parameter
Specification
Model
PVXS-066-M-R-DF-0000
Pump Type
Open-loop variable displacement axial piston pump
Rated Pressure (100% duty cycle)
350 bar
Maximum Pressure (per ISO 5598:2008)
420 bar
Maximum Geometric Displacement
66 cm³/rev
Speed Range
150 – 1800 rpm (minimum – maximum)
Inlet Pressure
Minimum: 0.85 bar (absolute); Maximum: 10 bar
Case Pressure (Over Pressure)
1.5 bar (at 1800 rpm); 1.9 bar (at 1500 rpm)
Ambient Temperature Range
Minimum: -20°C; Maximum: 50°C
Hydraulic Fluid Temperature Range
Minimum: -25°C (start-up); Maximum: 90°C (continuous operation)
Fluid Viscosity Range
10 – 75 cSt (continuous operation); Maximum: 1000 cSt (start-up)
Fluid Cleanliness
ISO 4406 18/15/13
Mounting Type
Flange or foot-mounted; Combination units are foot-mounted only
Pipe Connection
SAE J518 Code 61 (2″ – 500); SAE J518 Code 62 (1″ – 6000)
Direction of Rotation
Clockwise (standard); Counterclockwise available on request
Weight
68 kg
Moment of Inertia
0.032 kg·m²

3. Installation Instructions

3.1 Installation Preparation

  • Before installation, check the pump for any damage during transportation, such as cracks, oil leaks, or loose parts. If any damage is found, do not install or operate the pump and contact EATON VICKERS after-sales service immediately.
  • Ensure the installation location is clean, dry, and well-ventilated, with sufficient space for maintenance and operation. Avoid installing the pump in areas with excessive dust, humidity, or high temperature.
  • Prepare the required tools, fasteners, and hydraulic pipelines. The pipelines should be clean, free of debris, and compatible with the pump’s pressure rating. Flush the pipelines before connection to remove any contaminants.

3.2 Mounting Steps

  1. Mount the pump to the base or flange using the specified fasteners. Ensure the mounting surface is flat and smooth, and the fasteners are tightened to the recommended torque to prevent vibration during operation.
  2. Align the pump shaft with the drive shaft (motor or engine) accurately. The coaxiality error should not exceed 0.1 mm/m to avoid excessive wear on the shaft and bearings.
  3. Connect the hydraulic inlet and outlet pipelines to the pump’s ports. Ensure the connections are tight to prevent oil leaks. Use the correct gaskets or seals as specified by EATON VICKERS.
  4. Install the required filters, pressure gauges, and other accessories according to the hydraulic system design. Ensure the filter is installed in the inlet pipeline to protect the pump from contaminants.
  5. Fill the pump and hydraulic system with the recommended hydraulic oil (refer to Section 4.2 for oil specifications). Bleed the air from the system to avoid cavitation and damage to the pump.

4. Operation Guide

4.1 Pre-Operation Check

  • Check the hydraulic oil level in the system. The oil level should be within the recommended range (between the minimum and maximum marks on the oil tank).
  • Inspect all pipeline connections, fasteners, and seals for looseness or oil leaks. Tighten any loose parts and replace damaged seals immediately.
  • Check the pressure gauge and other instruments to ensure they are functioning normally and calibrated correctly.
  • Verify that the drive system (motor/engine) is operating normally and the direction of rotation is consistent with the pump’s requirements.

4.2 Start-Up Operation

  1. Start the drive system (motor/engine) and run it at low speed (150 – 300 rpm) for 2 – 3 minutes to allow the hydraulic oil to circulate and lubricate all components of the pump.
  2. Gradually increase the speed to the rated speed (1800 rpm) while monitoring the pressure gauge. The system pressure should be within the normal range, and there should be no abnormal noise, vibration, or oil leaks.
  3. Adjust the displacement of the pump according to the system requirements. The displacement can be adjusted by the control mechanism (refer to the control system manual for detailed operation).

4.3 Normal Operation

  • During operation, monitor the system pressure, oil temperature, and pump operation status regularly. The oil temperature should not exceed 90°C; if it is too high, check the cooling system and oil viscosity.
  • Avoid operating the pump at maximum pressure for a long time (exceeding 100% duty cycle) to prevent overheating and premature wear.
  • Do not suddenly change the displacement or pressure during operation, as this may cause pressure shocks and damage the pump and system components.
  • If any abnormal phenomena are found (such as abnormal noise, vibration, oil leaks, or sudden pressure changes), stop the pump immediately, check the cause, and troubleshoot before restarting.

4.4 Shutdown Operation

  1. Gradually reduce the system pressure to the minimum and then stop the drive system (motor/engine).
  2. After shutdown, check the pump and system for oil leaks, loose parts, or other abnormalities.
  3. If the pump will not be used for a long time (more than 1 month), drain the hydraulic oil from the pump and system, clean the pipelines and oil tank, and fill with new hydraulic oil before storage.

5. Maintenance and Servicing

5.1 Routine Maintenance

  • Daily Maintenance: Check the oil level, pipeline connections, and pump operation status; clean the surface of the pump and remove dust and debris.
  • Weekly Maintenance: Inspect the filter element for contamination; if the filter is clogged, replace it immediately. Check the oil viscosity and color; if the oil is discolored, emulsified, or has impurities, replace it.
  • Monthly Maintenance: Check the seals and gaskets for wear or damage; replace any damaged parts. Inspect the pump shaft and bearings for abnormal wear or noise; lubricate the bearings if necessary.

5.2 Periodic Servicing

The pump should be disassembled and inspected periodically according to the operating hours (recommended every 2000 operating hours or 1 year, whichever comes first). The following steps should be performed:
  1. Shut down the pump and drain the hydraulic oil from the system.
  2. Disconnect the pipelines, drive shaft, and mounting fasteners, and remove the pump from the installation location.
  3. Disassemble the pump according to the disassembly diagram (refer to Appendix A), and inspect all components for wear, damage, or deformation, including the piston, cylinder block, swashplate, valve plate, and bearings.
  4. Replace any worn or damaged components with original EATON VICKERS spare parts. Do not use non-original parts, as this may affect the pump’s performance and service life.
  5. Assemble the pump in the reverse order of disassembly, ensuring all components are installed correctly and tightened to the recommended torque.
  6. After assembly, fill the pump with new hydraulic oil, bleed the air, and test-run the pump to ensure it operates normally.

5.3 Hydraulic Oil Requirements

Use hydraulic oil that meets DIN 51524 Part 2 specifications. The recommended oil viscosity is 10 – 75 cSt at operating temperature. Avoid mixing different types of hydraulic oil. The oil should be replaced every 1000 operating hours or 6 months, whichever comes first. If the oil is contaminated or degraded, replace it immediately.

6. Safety Precautions

  • Before installing, operating, or maintaining the pump, read this manual carefully and follow all instructions. Failure to comply with the safety precautions may result in equipment damage, personal injury, or death.
  • Do not operate the pump beyond the specified pressure, speed, or temperature range. Overloading the pump may cause component failure and oil leaks.
  • Always relieve the system pressure before disassembling the pump or performing maintenance. Failure to do so may cause hydraulic oil to spray out, resulting in personal injury.
  • Wear appropriate personal protective equipment (PPE), such as safety glasses, gloves, and protective clothing, when operating or maintaining the pump.
  • Keep the work area clean and tidy. Avoid placing tools, debris, or other objects near the pump, as this may cause accidents.
  • Do not modify the pump or its components without the permission of EATON VICKERS. Modifications may affect the pump’s performance and safety, and will void the warranty.
  • If the pump malfunctions or is damaged, stop using it immediately and contact EATON VICKERS after-sales service. Do not attempt to repair the pump without professional training.

7. Troubleshooting

Fault Phenomenon
Possible Causes
Troubleshooting Methods
No oil output or insufficient oil output
1. Low oil level; 2. Clogged inlet filter; 3. Air in the system; 4. Damaged piston or cylinder block; 5. Incorrect rotation direction
1. Add hydraulic oil to the recommended level; 2. Clean or replace the filter element; 3. Bleed the air from the system; 4. Inspect and replace damaged components; 5. Correct the rotation direction
Abnormal noise or vibration
1. Air in the system; 2. Loose mounting fasteners; 3. Misalignment of drive shaft; 4. Worn bearings or swashplate; 5. Contaminated hydraulic oil
1. Bleed the air; 2. Tighten the fasteners; 3. Adjust the coaxiality; 4. Inspect and replace worn components; 5. Replace the hydraulic oil
Oil leaks
1. Loose pipeline connections; 2. Damaged seals or gaskets; 3. Cracked pump housing; 4. Excessive case pressure
1. Tighten the connections; 2. Replace damaged seals/gaskets; 3. Replace the pump housing; 4. Check and adjust the case pressure
Overheating of the pump
1. High oil temperature; 2. Insufficient lubrication; 3. Overload operation; 4. Clogged cooling system
1. Check the cooling system and reduce oil temperature; 2. Ensure sufficient lubrication; 3. Reduce the load and operate within the rated range; 4. Clean the cooling system
Unstable system pressure
1. Faulty pressure control valve; 2. Leaks in the system; 3. Contaminated hydraulic oil; 4. Worn valve plate
1. Inspect and repair the pressure control valve; 2. Repair leaks; 3. Replace the hydraulic oil; 4. Replace the valve plate

8. Warranty Information

The EATON VICKERS PVXS-066-M-R-DF-0000 variable displacement piston pump is covered by a 1-year warranty from the date of installation or 2000 operating hours, whichever comes first. The warranty covers defects in materials and workmanship under normal operating conditions. The warranty does not cover damage caused by improper installation, operation, maintenance, modification, or use of non-original spare parts. For warranty service, contact the nearest EATON VICKERS authorized service center and provide the pump model, serial number, and proof of purchase.

Appendix A: Disassembly and Assembly Diagram

Refer to the separate disassembly and assembly diagram provided with the pump for detailed steps on disassembling and assembling the pump components.
Note: This manual is subject to change without prior notice. For the latest version of the manual, please visit the EATON VICKERS official website.
EATON VICKERS © All Rights Reserved.
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