Rexroth A4VSO180 Hydraulic Pump 28cc 280 Bar High Pressure

A4VSO180LR2/22R-PPB13N00 A4VSO180DRG/22R-VPB25N00 A4VSO180DRG/22R-VZB13N00
A4VSO180DRG/22R-PZB13N00 A4VSO180DRG/22R-VPB13N00 Axial piston pump, high-pressure Rexroth variable hydraulic pump, industria

FAQ;

• Swash Plate Angle: The swash plate angle might be set too small, minimizing displacement.

Q10: Why is there flow output when the control signal is at zero (neutral)?

This is often due to the control mechanism being off its neutral point. The cause can be a misadjusted, loose, or damaged controller. The solution is to re-zero, tighten, or replace the controller.

Q11: The output flow fluctuates. What is the cause?

Flow instability, often accompanied by pressure fluctuations, is frequently related to issues within the control piston mechanism. This can be due to contamination scratching the control piston, a weak or damaged control amplifier spring, or other damaged components. Addressing this usually requires disassembling the pump to inspect, repair, or replace the affected parts, and possibly increasing damping or spring stiffness.

Q12: The pump is leaking oil externally. Where should I look?

External leaks can originate from:

• Shaft Seal: Damaged or worn-out shaft seal.

• Pipe Connections: Loose hose connections, damaged fittings, or aged/ cracked sealing washers.

• Case Ports: Leaks from the variable mechanism cover bolts due to loose bolts or破损 seals.

• Case Imperfections: Rarely, sand holes in cast iron casings or poor welds.

• High Case Pressure: Excessive internal leakage can pressurize the case, damaging seals or pushing them out. Ensure the case drain line is unrestricted, of adequate size, and not too long.

5. Special Topics & Long-Term Storage

Q13: When is bearing flushing necessary, and what is the flow rate?

Bearing flushing is recommended for: using special HF fluids, operating at viscosity/temperature limits, or for pumps installed vertically (shaft up). Refer to technical documentation for specific flow rates, which range from ~3 L/min for size 40 to ~40 L/min for size 1000.

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