RexrothA4VSO71 Axial Piston Variable Pump | Open Circuit Hydraulic Pump

A4VSO71 A4VSO Series 71cc Axial Piston Variable Hydraulic Pump

Key Features

1. 71cc/rev geometric displacement

2. Nominal pressure: 350 bar; Max peak pressure:400 bar

3. Open circuit design, swashplate axial piston structure

4. ultiple control options: DR pressure control, DFR pressure-flow control, LR power control etc

5. Low noise, excellent suction performance

6. Modular construction, visual swivel angle indicator

7. Through drive available for multi-pump assembly

8. Wide compatible hydraulic fluid, optional FKM seals

Technical Parameters

Specifications:

Application Scenarios

· Hydraulic power unit / Hydraulic station

· Industrial hydraulic press & forging machine

· Mining machinery

· Metallurgical equipment

· Construction machinery

· Marine auxiliary hydraulic system

Competitive Advantage:

1. A4VSO71 supports multiple control modules such as DR pressure control and DFR pressure-flow compound control, featuring fast variable response and stepless flow adjustment. Suitable for stationary industrial equipment including injection molding machines, hydraulic stations and machine tools, it realizes energy-saving power matching according to process requirements.
2. It has a rated pressure of 350bar and peak pressure up to 400bar. With excellent suction performance and low running noise. The 71cc displacement balances power and energy consumption, ideal for long continuous operation and improves the stability of the whole hydraulic system.
3. It adopts through-drive design, which can be connected in series with other hydraulic pumps to build multi-pump integrated hydraulic systems. The core friction pairs are wear-resistant. Original and replacement spare parts are widely available, easy for maintenance and reduce downtime losses of industrial equipment.

The Analysis For Rexroth A4VSO Piston Pump Common Breakdown:

1. Insufficient pump output flow and slow equipment movement. Wear of pistons and cylinder block or scratched valve plate increases internal leakage, making the pump unable to reach rated flow. It slows down the actuators of injection molding machines and hydraulic stations, extends production cycle, and the problem is more obvious under heavy processing load.
2. Excessive abnormal noise and vibration of pump body. Main causes are contaminated hydraulic oil, air entering suction pipeline and bearing wear. Impurities and cavitation continuously impact precision internal components. Vibration and noise gradually worsen. Long time operation may damage pump core and lead to seizure.
3. English: Variable control failure and abnormal adjustment of pressure and flow. Stuck control spool or fatigue failure of control spring prevents the variable mechanism from adjusting swash plate angle normally. Flow cannot change with process requirements, causing unstable system pressure and higher energy consumption, affecting processing accuracy of injection molding machines and hydraulic presses.