Frequently Asked Questions (FAQ)

Q1: What is the main function of the "DR" control?

A:​ The DR control​ is a pressure compensator. It automatically adjusts the pump's swashplate angle (displacement) to maintain a constant preset system pressure. When system pressure reaches the DR setting, the pump de-strokes to near-zero flow, reducing energy consumption and heat generation. It is ideal for systems with long holding periods.

Q2: What does the "VPA14N00" suffix indicate?

A:​ This code defines the mechanical configuration:

• V: FKM (Viton)​ seals, suitable for a wider range of fluids and higher temperatures than standard NBR.

• P: Standard parallel key shaft​ (DIN 6885).

• A14: Port size code 14​ (metric threads) on the A side​ (rear).

• N00: No through-drive​ capability (solid shaft end).

Q3: Can this pump be used as a motor?

A:​ No.​ The A10VSO series with DR control is designed specifically for open-circuit pump applications. It is not recommended for use as a hydraulic motor.

Q4: What is the purpose of the X port?

A:​ The X port​ is the external pilot port​ for the DR pressure control valve. It can be used to:

1. Remotely set pressure: Connect an external relief valve to control the pump's pressure setting remotely.

2. Unload the pump: By depressurizing the X port, the pump can be forced to zero pressure for unloading.

Q5: What are the key differences between A10VSO and A2FO series?

A:​