A6VE160HA3T/63W-VZL22XB-S Rexroth Motor 160cc 450 bar

Product Overview

The A6VE160HA3T/63W-VZL22XB-S is a bent-axis axial piston variable plug-in motor built on the Bosch Rexroth A6VE Series 63 platform, in the A6VE160 displacement size (160 cm³/rev). The motor features a bent-axis design with an axial tapered piston rotary group, engineered for hydrostatic drives in both open and closed circuits. It offers a nominal pressure of 400 bar, maximum pressure of 450 bar, rated speed of approximately 3,100 rpm, maximum speed up to 4,900 rpm, maximum output torque of approximately 1,019 N·m (Δp=400 bar), maximum input flow of approximately 496 L/min, and a weight of approximately 64 kg.

The defining design feature of the A6VE series is its plug-in structure — the motor’s mounting flange is located at the center of the case, combined with a recessed center flange that allows the motor to be directly plugged into a mechanical gearbox without needing to observe installation tolerances or configuration specifications, achieving an extremely space-saving compact integration. This design is particularly suited for wheel drive, travel drive, and other mobile hydraulic applications requiring direct motor integration into the gearbox.

The model code A6VE160HA3T/63W-VZL22XB-S decodes as follows: A6VE160 designates the series and displacement size (plug-in variable motor, 160 cm³/rev), HA3T is the control device code (HA series control; specific functions to be confirmed from Rexroth selection manual), T is the installation/drive direction code, 63 is the series designation (Series 63), W indicates bidirectional rotation, and VZL22XB-S is the port configuration, shaft type, and special option code. The motor’s displacement is infinitely variable from Vg max to Vg min = 0, enabling full-range variable control.

Engineered as a form-fit-function replacement for original Bosch Rexroth A6VE160 series motors, this model maintains identical mounting flange dimensions, shaft specifications, and port locations, enabling drop-in interchangeability. Each unit undergoes 100% simulated load testing prior to shipment, validating output torque and volumetric efficiency against original specifications.

Technical Specifications 

• Model: A6VE160HA3T/63W-VZL22XB-S

• Material Number: R902038806 (original coding)

• Series: Bosch Rexroth A6VE Series 63

• Motor Type: Bent-axis axial piston variable plug-in motor

• Design Feature: Bent-axis configuration, axial tapered piston rotary group, recessed center mounting flange, plug-in design

• Maximum Displacement (Vg max): 160 cm³/rev (9.76 in³/rev)

• Minimum Displacement (Vg min): ≈ 0 cm³/rev (infinitely variable)

• Nominal Pressure (p nom): 400 bar (5,800 psi)

• Maximum Pressure (p max): 450 bar (6,525 psi)

• Rated Speed (Vg max): Approx. 3,100 rpm

• Max. Speed (Vg < Vg max): Approx. 4,900 rpm

• Max. Speed (Vg min): Approx. 5,500 rpm

• Maximum Input Flow: Approx. 496 L/min (131 US gal/min)

• Maximum Output Torque (Δp=400 bar): Approx. 1,019 N·m (752 lb-ft)

• Rotation: Bidirectional

• Mounting: Plug-in (recessed center flange, direct mechanical gearbox insertion)

• Control Method: HA3T control

• Circuit: Open circuit / Closed circuit

• Seal Material: FKM

• Weight (approx.): 64 kg (141 lb, standard configuration)

• Filling Capacity: Approx. 2.4 L

• Moment of Inertia (Rotary Group): 0.0253 kg·m²

• Optional Features: Flushing valve, boost valve, counterbalance valve, speed sensor

Data Limitation Note: The specific functional definition of HA3T control (e.g., whether it includes pressure cut-off, load sensing, etc.) should be confirmed with Bosch Rexroth or an authorized dealer through the complete selection manual. R902038806 is the original material number; specific configuration details are subject to the original nameplate and selection manual.

Key Technical Advantages

1. Bent-Axis Tapered Piston Design with High Power Density

The A6VE160 employs the classic bent-axis design of the Bosch Rexroth A6VE series, with pistons arranged at an angle to the drive shaft, transmitting torque through spherical contact between tapered pistons and the drive plate. The A6VE series utilizes a nine-piston rotating group design, achieving a nominal pressure of 400 bar and maximum pressure of 450 bar at 160 cm³/rev, with maximum output torque of 1,019 N·m. The bent-axis configuration offers higher mechanical efficiency (94–96%) compared to swashplate designs, with excellent starting efficiency at low speeds. The bent-axis axial tapered piston motor uses structurally simple piston rings for sealing within the cylinder bore, ensuring reliable volumetric efficiency.

2. Plug-In Design with Direct Gearbox Integration

The A6VE series’ motor mounting flange is located at the center of the case. This recessed center flange design allows the motor to be almost completely inserted into the gearbox, achieving an extremely space-saving compact installation. Installation is simple — the motor can be directly slid into the mechanical gearbox without needing to observe configuration specifications or installation tolerances. This design offers significant advantages in wheel drive and travel drive applications: eliminating couplings and external mounting brackets, reducing system component count and potential failure points, while improving drive system rigidity and alignment precision.

3. Wide Control Range with High Speed and High Torque Capability

The A6VE160’s displacement is infinitely variable from Vg max to Vg min = 0, providing an exceptionally wide control range. Through this wide range adjustment, the variable motor satisfies the requirements for both high rotational speed and high torque. At full displacement, the motor delivers maximum torque of approximately 1,019 N·m for heavy-load starting and climbing conditions; at minimum displacement, speeds reach up to 5,500 rpm for high-speed travel requirements. Output speed depends on pump flow and motor displacement, while output torque increases with the pressure differential between high and low-pressure sides and with increasing displacement.

4. Compact Structure with System Integration Convenience

The A6VE160 features a compact cast iron housing, with the recessed center flange design minimizing axial space occupation when integrated into mechanical gearboxes. The motor can be optionally equipped with add-on flushing and boost valves, or integrated/add-on counterbalance valves, simplifying system piping design. The motor is suitable for both open and closed circuits, applicable in travel drive, wheel drive, and winch drive scenarios in mobile applications. The A6VE series offers multiple displacement sizes from 28 to 250 cm³/rev, enabling machine manufacturers to flexibly match displacement requirements.

Application Areas

• Excavator Travel Drives: Caterpillar EC460/EC480 travel motor assemblies (VOE 14508165/VOE14569653/VOE14508165)

• Construction Machinery Travel Drives: Bulldozers, loaders, graders, mining trucks wheel/travel drive systems

• Rotary Drilling Rigs: Power head drives, winch drives, and chassis travel devices

• Industrial Hydraulic Transmissions: Industrial drive scenarios requiring variable speed/torque with compact integration and high efficiency

• Heavy-Duty Mobile Equipment: Drilling rigs, mining equipment, and other high-torque, high-reliability drive requirements

Expert Maintenance Tips

1. Plug-In Mounting Notes: The A6VE series motor features a plug-in design, allowing direct sliding into the mechanical gearbox during installation. Before installation, ensure the gearbox input shaft spline and motor output spline are clean and free of damage, with no burrs on mating surfaces. Do not strike the coupling or motor shaft end during installation, to avoid damaging internal bearings and rotating components.

2. Case Filling and Venting: Before initial installation or startup after extended idle periods, fill the motor housing with clean hydraulic fluid to prevent dry friction on piston pairs during startup. Ensure the unit is pre-filled/vented, verifying suction conditions and oil viscosity meet OEM specifications.

3. Case Drain Management: The case drain ports (T1/T2) must be connected separately to the reservoir, with return lines below the minimum oil level. When multiple motors are connected in series, avoid back pressure buildup in shared return lines. Respect maximum allowable case pressure limits; use separate drain lines when necessary.

4. Hydraulic Fluid Cleanliness and Viscosity Management: Recommended optimum viscosity range is 16–36 mm²/s (at operating temperature). Maintain hydraulic fluid cleanliness at ISO 18/15 or NAS Level 9 or better. Replace hydraulic fluid and filter elements every 1,000 operating hours or annually, with filter element filtration accuracy no less than 10 μm.

5. Variable Control Mechanism Maintenance: Periodically verify the response characteristics of the HA3T control mechanism. Check control response linearity every 500 operating hours, confirming that displacement adjustment switching time from minimum to maximum (or zero to maximum) is within specification. If response is sluggish or non-linear, check pilot circuit pressure and control valve spool wear.