The Rexroth A4VSO71 hydraulic pump is one of the most widely used axial piston pumps in construction and industrial machinery. Known for its precise control and long lifespan, it delivers stable flow even under high pressure. However, after long-term use, internal wear or oil contamination can lead to performance issues. This guide summarizes the most common failures, causes, and recommended replacement parts for the A4VSO71 pump.

Common Failures and Causes

1. Pressure Instability – Caused by worn valve plate or control piston leakage.

2. Internal Leakage – Due to scoring on the cylinder block or damaged seals.

3. Excessive Noise and Vibration – Often linked to piston shoe wear or misalignment.

4. Overheating – Results from high internal friction or poor oil filtration.

Recommended Spare Parts

Halies provides compatible spare parts for the A4VSO71 pump, including:

• Cylinder block and piston shoe set

• Valve plate and retainer plate

• Drive shaft

• Complete seal kit

Maintenance Tips

• Replace oil and filters every 1000 working hours.

• Monitor pump case pressure regularly.

• Keep suction lines clean to avoid cavitation.

Conclusion

Using high-quality spare parts and performing regular maintenance significantly extends the service life of the A4VSO71 pump. Halies Hydraulic offers 100% performance-tested components with reliable global delivery.

Contact Halies Today

Looking for Rexroth A4VSO71 spare parts? Contact Halies Hydraulic today.

Contact: Stella

Email: HALIES03@HALIESHYD.com

WeChat / Phone: +86 189 7097 2986

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