A6VM215EP6D1P001B/71MWV0S4A210H-0 Rexroth Piston Motor 215cc 450bar

Product Overview

The A6VM215EP6D1P001B/71MWV0S4A210H-0 is a bent-axis axial piston variable motor from the Bosch Rexroth A6VM Series 71—the latest flagship variable motor line from Rexroth. Featuring a proven bent-axis design with an axial tapered piston rotary group, this motor delivers infinitely variable displacement from maximum down to zero, engineered for hydrostatic drives in both open and closed circuits.

Compared to the classic Series 63, the Series 71 delivers comprehensive upgrades in pressure ratings, power density, and size classification. Nominal pressure is increased to 450 bar, with peak pressure reaching up to 500 bar. This model is equipped with EP6 proportional electric control, enabling stepless speed variation and precise torque control via a proportional solenoid valve.

Designed as a 100% interchangeable direct replacement for the original Rexroth A6VM215EP6D1P001B/71MWV0S4A210H-0, this product matches OEM specifications in mounting dimensions, porting interfaces, and performance characteristics. Every unit undergoes 100% simulated duty cycle testing prior to shipment, validating volumetric efficiency, mechanical efficiency, and sealing integrity under actual operating load conditions.

Technical Specifications 

• Model: A6VM215EP6D1P001B/71MWV0S4A210H-0

• Series: Rexroth A6VM Series 71 Bent-Axis Axial Piston Variable Motor

• Max Geometric Displacement: 216.5 cm³/rev

• Nominal Pressure: 450 bar

• Peak Pressure: 500 bar

• Control Type: EP6 Proportional Electric Control (negative control)

• Max Speed (at Vg max): 2900 rpm

• Max Flow: 628 L/min

• Nominal Torque (at Vg max & pnom): 1550 N.m

• Theoretical Torque Coefficient: Approx. 3.44 N.m/bar

• Weight: Approx. 78 kg

• Product Type: Bent-axis axial piston variable motor

• Circuit Type: Open circuit / Closed circuit

• Displacement Range: Vg max to 0 (infinitely variable to zero)

• Seal Material: FKM

• Direction of Rotation: Reversible

Note: Pressure and speed parameters may vary across different configurations (shaft type, seal, control type, etc.). Please refer to the corresponding Rexroth technical manual RE 91610 for specific model details.

Key Technical Advantages

1. Bent-Axis Variable Design with Ultra-High Pressure Rating and Power Density

The A6VM Series 71 employs a proven bent-axis axial piston architecture. Compared to Series 63, nominal pressure is increased from 400 bar to 450 bar, with peak pressure reaching 500 bar. With a compact 216.5 cc/rev displacement package delivering 1550 N.m nominal torque, this motor achieves greater torque and power output within the same installation volume.

2. EP6 Proportional Electric Control for Precise Stepless Speed Regulation

EP series proportional electric control adjusts the swashplate angle via a proportional solenoid valve, enabling stepless speed variation and precise torque control with sensitive response and energy savings. EP6 is a negative control type with superior response frequency and control precision compared to traditional hydraulically piloted motors, facilitating seamless integration into heavy machinery CAN bus control systems. Compared to conventional switch control, energy savings of 15%–30% can be achieved.

3. Infinitely Variable Displacement to Zero with Exceptionally Wide Control Range

The A6VM Series 71 supports infinitely variable displacement from Vg max down to Vg min = 0, providing an exceptionally wide control range. This enables the motor to flexibly transition between low-speed high-torque and high-speed light-load operation modes, meeting complex and varying operating requirements.

4. 100% Interchangeability – Zero-Modification Drop-In Replacement

Manufactured to exact OEM mounting dimensions, porting specifications, and performance standards, this motor achieves 100% interchangeability with the original Rexroth A6VM215EP6D1P001B/71MWV0S4A210H-0. No machine modifications are required—simply replace and resume operation, minimizing downtime and reducing maintenance costs.

5. 100% Simulated Duty Cycle Testing for Extreme Environment Reliability

Every motor undergoes 100% simulated duty cycle testing before shipment, validating performance under rated pressure (450 bar), peak pressure (500 bar), and maximum speed conditions—ensuring long-term reliability in demanding mobile and industrial applications.

6. Excellent Slow-Running Characteristics with High Starting Efficiency

The A6VM Series 71 features excellent slow-running characteristics and high starting efficiency. The bent-axis design eliminates the shoe overturning issues common in swashplate motors, delivering higher mechanical efficiency during low-speed starts and smoother starting torque output.

7. Modular Configuration for Versatile Application Adaptation

The A6VM Series 71 offers multiple control options (EP electric proportional, HP hydraulic proportional, HZ two-point, HA automatic high-pressure control, DA automatic speed-related control, etc.). Optional flushing valves, boost-pressure valves, counterbalance valves (BVD/BVE), and speed sensors are available. The new size classification (85, 115, 150, 170, 215) precisely matches modern hydraulic pump flow outputs, reducing overflow losses and improving overall machine energy efficiency.

Application Areas

• Mobile Machinery: Excavator travel drives, crawler crane travel drives, drilling rig travel drives

• Construction Equipment: Rotary drilling rig power head drives, concrete pump truck pumping drives

• Mining Equipment: Underground LHD travel drives, mining auxiliary equipment

• Marine Engineering: Drilling platform winch drives, marine deck machinery

• Hoisting Machinery: Crawler crane swing drives, hoist winch drives

• Industrial Equipment: Injection molding machine screw drives, metallurgical equipment high-torque drives

• Specialty Vehicles: Airport ground support equipment, snowcat travel drives

Expert Maintenance Tips

1. Pre-Installation Preparation: Before using the A6VM series motor, read and understand the complete Rexroth instruction manual (RE 91610). For first commissioning, fill the motor housing with hydraulic fluid using a filling unit with filtration not less than 10 µm and bleed air completely—never operate the motor without fluid.

2. Case Drain Port Orientation: Ensure the case drain port (T) is positioned at the highest point during installation to guarantee proper lubrication and air bleeding. The drain line must return to a separate oil tank with backpressure within allowable limits.

3. Oil Cleanliness Control: A6VM series motors require high fluid cleanliness. Mineral oil HLP according to DIN 51524 is recommended. Recommended system filtration not less than ISO 4406 18/13. Regular oil analysis is recommended with filter change intervals adjusted based on contamination levels.

4. Electric Proportional Control Tuning: EP6 electric proportional control requires a minimum pilot pressure of 30 bar. During commissioning, set the solenoid current-pressure characteristic curve according to RE 91610 technical manual specifications.

5. Coupling Alignment: Precise alignment between the motor shaft and drive shaft is required with minimal tolerance. After installation, manually rotate the coupling to verify smooth operation.

6. Regular Inspection Schedule: Regular inspection of the hydraulic system and axial piston unit is recommended. Check hydraulic fluid level daily and monitor operating temperature, noise levels, and case drain flow regularly. Abnormal increases may indicate internal wear or seal degradation.

7. Operating Temperature Control: Ensure the hydraulic system operating oil temperature remains within the recommended range (30–90°C) to prevent viscosity reduction and seal degradation from excessive temperatures.