A4VSO180EO1/22R-PPB13N00 A4VSO180LR2/22R-VPB25N00 A4VSO180LR2/22R-VZB13N00
A4VSO180LR2/22R-PZB13N00 A4VSO180LR2/22R-VPB13N00 Rexroth axial piston pump high-pressure industrial variable A4VSO180

FAQ:

• Selection: Select a viscosity grade (e.g., VG 46, VG 68) so that the viscosity at the operating temperature (typically tank temperature in open circuits) falls within the optimal range. Generally, opting for a higher viscosity grade is advised.

Q6: What are the fluid cleanliness requirements?

To ensure reliable operation and long service life, the oil cleanliness should be at least NAS 1638 Class 9 or ISO/DIS 4406 18/15.

Q7: Why does my pump get overheated?

Common causes for excessive heating include:

• Internal Leakage: Excessive internal leakage within the pump components converts hydraulic energy to heat.

• Mechanical Friction: Dry or semi-dry friction due to worn parts or inadequate lubrication generates heat.

• Fluid Friction: Inadequate tank capacity or cooling, causing the system to overheat.

• Clogged Return Line Filter: A blocked return filter creates high backpressure, leading to increased temperature.

• Low Oil Level: Insufficient oil in the reservoir reduces cooling capacity.

4. Maintenance & Troubleshooting

Q8: What does daily/regular maintenance involve?

• Keep the pump exterior clean from dust and oil污.

• Check oil levels before start-up and during operation.

• Listen for abnormal noises during operation, which may indicate internal issues like part wear or looseness.

• Regularly record operating parameters like pressure, flow, and temperature to monitor health.

• Change fluid filters periodically (e.g., every 1000 hours or as per conditions).

• Check and replace worn or aged seals.

• Follow lubrication requirements for various points.

• Inspect the coupling for looseness or wear.

Q9: The pump outputs insufficient flow or no flow at all. What could be wrong?

Primary reasons are:

• Insufficient Inflow: Caused by high suction line resistance, low oil level, excessive pump speed, or a clogged inlet strainer/suction line.

• Excessive Leakage: Worn internal parts (pistons, cylinder block, port plate) leading to high internal leakage.

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

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