A6VE107HZ3/63W-VZL020B Rexroth Variable Piston Motor 107cc 400bar

Product Overview

The A6VE107HZ3/63W-VZL020B is a variable-displacement, bent-axis axial piston motor from the Bosch Rexroth A6VE series, engineered as a high-performance plug-in hydraulic motor. Featuring an axially tapered piston rotary group of bent-axis design, this motor is specifically designed for hydrostatic drives in both open and closed circuits.

The hallmark of the A6VE series is its infinitely variable displacement capability—from Vg max continuously down to Vg min = 0—providing an exceptionally wide control range that enables both high rotational speed and high torque output from a single motor. The plug-in design allows for space-saving installation directly into mechanical gearboxes with minimal mounting complexity.

Designed as a 100% interchangeable direct replacement for the original Rexroth A6VE107HZ3/63W-VZL020B, 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.

This motor is widely deployed in hydrostatic drive systems for mobile applications, including construction machinery, road equipment, and agricultural machinery requiring high starting torque.

Technical Specifications 

• Model: A6VE107HZ3/63W-VZL020B

• Part Number: R909604870

• Series: 63

• Product Type: Bent-axis axial piston variable motor (plug-in)

• Geometric Displacement (Vg max): 107 cm³/rev

• Min Displacement (Vg min): 0 cm³/rev (complete zero stroke)

• Rated Pressure: 400 bar

• Peak Pressure: 450 bar

• Max Speed (at Vg max): 3550 RPM

• Max Torque (at Δp = 400 bar): 681 N.m

• Max Flow: 380 L/min

• Control Type: Hydraulic two-point control (HZ3) with fast switching between two displacement settings

• Moment of Inertia (Rotary Group): 0.0127 kgm²

• Seal Material: FKM (Viton)

• Mounting Flange: 2-hole, ISO 3019-2

• Weight: Approx. 47 kg

• Operating Oil Temperature: -25°C to +115°C (FKM seals)

• Optimal Operating Viscosity: 16–36 mm²/s

• Hydraulic Fluids: HLP mineral oil (DIN 51524-2); biodegradable fluids (ISO 15380) on request

Key Technical Advantages

1. Infinitely Variable Displacement for Optimal Speed-Torque Matching

The A6VE series offers infinitely variable displacement from Vg max down to Vg min = 0, providing an exceptionally wide control range. The HZ3 hydraulic two-point control on the A6VE107HZ3/63W-VZL020B enables fast switching between two displacement settings, allowing the motor to deliver both low-speed high-torque and high-speed low-torque performance as required. A single motor can thus cover multiple operating modes, significantly improving overall machine efficiency.

2. Plug-In Design for Compact Integration and Simplified Installation

The A6VE series features a plug-in design that allows direct insertion into mechanical gearboxes without complex mounting tolerances. This significantly simplifies installation, reduces assembly time and cost, and enables exceptional structural compactness—a critical advantage for space-constrained mobile equipment.

3. 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 A6VE107HZ3/63W-VZL020B. No machine modifications are required—simply replace and resume operation, minimizing downtime and reducing maintenance costs.

4. 100% Simulated Duty Cycle Testing for Extreme Environment Reliability

Every motor undergoes 100% simulated duty cycle testing before shipment, validating performance under rated pressure (400 bar), peak pressure (450 bar), and maximum speed conditions. The combination of hydraulic two-point control and fast-switching capability ensures long-term reliability in demanding mobile applications.

5. Bent-Axis Tapered Piston Design for High Efficiency and Extended Service Life

The A6VE series employs a proven bent-axis design with an axially tapered piston rotary group. This architecture optimizes internal flow dynamics, delivering exceptional volumetric and mechanical efficiency. The piston rotary group features hydrostatic bearings, significantly extending service life.

6. High Power Density with Wide Temperature Range Capability

With a compact 107 cm³/rev displacement package delivering 400 bar rated pressure, 450 bar peak pressure, and 681 N.m maximum torque. FKM seals support a wide oil temperature range of -25°C to +115°C, enabling reliable operation across extreme climatic conditions from arctic to tropical environments.

7. Optional Flushing Valve and Speed Measurement Interface

The A6VE series supports optional flushing valve and speed measurement interface, enhancing system integration flexibility. This is particularly valuable for oil cooling in closed circuits and condition monitoring applications.

Application Areas

• Construction Machinery: Excavator travel drives, pavers, rollers, drilling rigs, bulldozers

• Road Equipment: Road milling machines, soil stabilizer travel drives

• Agricultural Machinery: Large combine harvesters, self-propelled sprayer drives

• Mining Equipment: Underground LHDs, mining truck auxiliary drives

• Industrial Equipment: Metallurgical equipment, steel processing machinery drives

• Specialty Vehicles: Airport de-icing vehicles, special-purpose vehicles

Expert Maintenance Tips

1. Pre-Installation Preparation: Before using the A6VE series motor, read and understand the complete instruction manual (RE 91606). For first commissioning, fill the motor housing with hydraulic fluid using a filling unit with filtration not less than 10 µm. Never operate the motor without fluid.

2. Plug-In Installation Notes: The A6VE features a plug-in design—simply push the motor directly into the mechanical gearbox. Ensure the gearbox mounting bore is clean and free of contaminants before installation to prevent seal damage.

3. Cleaning and Care: Clean the axial piston unit using only water and, if necessary, a mild detergent. Never use solvents or aggressive cleaning agents. Do not direct a pressure washer at sensitive components such as shaft seals or electrical connections.

4. Regular Inspection Schedule: Bosch Rexroth recommends regular inspection of the hydraulic system and axial piston unit. Change hydraulic fluid at least once per year or every 2000 operating hours (whichever occurs first). Check hydraulic fluid level daily and operating temperature weekly.

5. Oil Cleanliness Control: A6VE series motors require high fluid cleanliness. Regular oil analysis (viscosity, aging, and contamination level) is recommended. Adjust filter change intervals based on contamination levels.

6. Case Drain Pressure Monitoring: Regularly monitor case drain pressure to ensure it remains within design limits, preventing excessive housing pressure that could damage shaft seals.

7. Seal Maintenance: Use OEM-specification FKM (Viton) seals to ensure sealing performance and service life across the -25°C to +115°C temperature range.