A10VSO28ED/31R-PPA12N00 A10VSO45DR/31R-PPA12K01 Rexroth A10VSO series plunger pump

FAQ;

Frequently Asked Questions (FAQ) – Rexroth A10VSO Series Piston Pumps

1. What is the A10VSO series piston pump?

The A10VSO is a swash-plate axial piston variable pump designed for open-circuit hydraulic systems. It is widely used in industrial and mobile applications due to its high efficiency, low noise, and long service life. Key features include:

• Flow rate adjustment via swash plate angle control.

• ISO/SAE standard mounting flanges and SAE metric flange connections.

• Continuous operating pressure up to 280 bar (peak: 350 bar).

• Multiple control options (pressure, flow, power, etc.).

• Through-drive capability for multi-pump systems.

2. What are the available displacement sizes?

The A10VSO series offers displacements from 10 to 140 cc/rev, categorized into:

• 31/32 series: 18–140 cc/rev (common sizes: 28, 45, 71, 100, 140).

• 52 series: 10 cc/rev (limited models).

3. How does the control mechanism work?

The pump supports multiple control types, indicated in the model code (e.g., DFR1):

• DR: Pressure control (remote).

• DFR: Pressure/flow control.

• DFLR: Pressure/flow/power control.

• FE/DFE: Electrohydraulic flow or pressure/flow control.

• ED: Electrohydraulic pressure control.

4. What are the installation requirements?

• Flange types: ISO 2-hole (A) or 4-hole (B) for larger sizes (e.g., 140 cc/rev).

• Shaft options: Keyed straight shaft (P), SAE splined shaft (S/R).

• Seals: NBR (standard) or FKM (fluorocarbon) for high-temperature fluids.

5. What are common troubleshooting issues?

• Low/no flow: Check for clogged filters, air ingress, or incorrect swash plate angle.

• Pressure fluctuations: Inspect control piston wear or dirty hydraulic oil.

• Overheating: Ensure proper cooling/lubrication and check for internal leakage.

• Noise/vibration: Verify alignment (max. 0.1mm deviation) and suction line integrity.

6. How to order or customize?

• Model example:

A10VSO140DR/32R-VPB22U00E-S1550

◦ 140: Displacement (cc/rev).

◦ DR: Pressure control.

◦ 32R: Series and rotation (R = clockwise).

◦ VPB22U00E: Port and seal options.

• Lead time: Typically 15 days for standard models.

7. Where can I get technical support?

Contact authorized distributors like Shanghai Weimi (China) or ATOS Hydraulic (global) for:

• Spare parts (e.g., seals, control modules).

• Repair services.

For full specifications, refer to Rexroth technical manuals or supplier catalogs

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