A2FO56/61R-VPB05
A2FO63/61R-PBB05
A2FO63/61L-PBB05
A2FO63/61R-PAB05
A2FO63/61L-PAB05 Rexroth Engineering Arm Pump Industrial Excavator Hydraulic Motor Made in Germany

FAQ:

1. 产品概述与特点 (Product Overview & Features)

• Q: What is the Rexroth A2FO56 series?

◦ A: The A2FO56 is a series of fixed displacement axial piston pumps with a swash plate design (specifically, a "bent-axis" design with a conical piston rotor assembly) intended for use in open circuit hydrostatic drives. They are suitable for both mobile and stationary applications .

• Q: What are the key features of the A2FO56 pump?

◦ A: Key features include :

▪ High Power Density: Provides substantial power output relative to its size.

▪ Compact Design and Small Dimensions: Saves space in equipment design.

▪ High Overall Efficiency: Contributes to energy savings.

▪ Robust Bearing Design: The drive shaft bearing is designed to meet the service life requirements of demanding applications.

▪ One-Piece Piston with Piston Ring Seal: Contributes to reliable performance.

▪ Economic Design: Offers a cost-effective solution.

2. 技术规格与型号 (Technical Specifications & Models)

• Q: What are the key technical parameters for the A2FO56 series?

◦ A: Primary specifications for the A2FO56 include :

▪ Geometric Displacement per Revolution: 56.1 cm³/rev

▪ Rated Pressure: 35 MPa (350 bar)

▪ Peak Pressure: 40 MPa (400 bar)

▪ Speed Range: Approximately 500 to 3500 rpm (dependent on specific model and pressure)

▪ Flow Rate: Proportional to drive speed and displacement; approximately 112 L/min at nominal speed (e.g., 2000 rpm) and Δp=350 bar .

▪ Mass: Approximately 18 kg .

• Q: How is the A2FO56 model number structured? Can you provide examples?

◦ A: The model code contains information about size, shaft design, port configuration, and control options. Examples of specific models within the A2FO56 series include :

▪ A2FO56/61L-PPB05

▪ A2FO56/61R-PPB05-S

▪ A2FO56/61R-NPB05

▪ A2FO56/61L-VBB05

▪ (Note: Components like /61L, /61R, -PPB05, -NPB05 indicate specific design variations such as rotation direction, porting, and control features).

3. 维护与保养 (Maintenance & Servicing)

• Q: What routine maintenance does the A2FO56 pump require?

◦ A: Proper maintenance is crucial for longevity and reliable operation. Key practices include :

▪ Pre-Startup Check: Verify oil level in the tank before startup. Use the recommended grade of hydraulic fluid .

▪ Initial Run: After a shutdown of more than 4 hours, allow the pump to run without load for at least 5 minutes before applying pressure .

▪ Regular Monitoring: Consistently check operating parameters like pressure, speed, and, importantly, oil temperature during work. The optimal operating oil temperature is typically suggested to be between 35°C and 60°C. If a sudden temperature rise occurs, investigate the cause immediately .

▪ Inspection: Regularly check pipe joints and flange connections for tightness to prevent leaks and air ingress .

▪ Oil Cleanliness: Maintain the cleanliness of the hydraulic oil. The higher the oil cleanliness, the longer the service life of the pump. External contaminants must be prevented from entering the reservoir and the pump .

• Q: What should I do if the pump's flow rate is insufficient or performance drops?

◦ A: Potential causes based on common issues include :

▪ Low Drive Speed: Ensure the motor meets the pump's required rated speed.

▪ Leaks in the System: Check the system for and repair any leakage points.

▪ Aeration/Suction Problems: Inspect the suction line for air leaks. Ensure the oil level in the tank is not too low.

▪ Loose Pump Casing Bolts: Prolonged operation and vibration can loosen bolts, which may need tightening to specification.

4. 售后服务,保修与贴牌 (After-Sales Service, Warranty & OEM)

• Q: What is the warranty policy for these pumps?

◦ A: Some suppliers offer a 12-month quality guarantee for their hydraulic pumps and motors. It is essential to confirm the specific warranty terms with your supplier or distributor at the time of purchase .

• Q: Is OEM (Original Equipment Manufacturer) service or private labeling available?

◦ A: Yes, certain manufacturers and suppliers explicitly state that they accept OEM requests and can mark products with your brand and product codes. This service is typically available for all products .

• Q: What about after-sales support and spare parts?

◦ A: Many suppliers position themselves as specialists providing system integration, technical support, and maintenance services. They often stock commonly used spare parts like piston pumps, vane pumps, and gear pumps to support customer needs . It is advisable to choose a reputable distributor or direct agent for better technical support and service .

5. 应用与安全 (Application & Safety)

• Q: What are the typical applications for the A2FO56 pump?

◦ A: This series is widely used in various machinery, including :

▪ Mobile Machinery: Concrete truck mixers, cranes (e.g., from manufacturers like XCMG, SANY), and other construction equipment.

▪ Industrial Applications: Various stationary industrial hydraulic systems.

• Q: Are there important safety instructions for installation and operation?

◦ A: Critical safety instructions include :

▪ The axial piston unit must always be filled with hydraulic oil and vented before commissioning and operation.

▪ The case drain line must be connected separately to the tank, ensuring it is below the low oil level and that the specified maximum case pressure is not exceeded.

▪ The minimum inlet pressure at port S (suction) must not fall below 0.8 bar absolute during operation to prevent cavitation.

▪ Use flexible connections for piping to achieve favorable noise values.

For the most accurate and detailed information regarding a specific model, always refer to the official Rexroth technical documentation or consult directly with an authorized distributor.

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