Rexroth A6VM A6VE variable hydraulic motor for the CNH Engineering Equipment 71476022 2459284 4530849 71484181 84261284 87269799 87313556

The A6VM and A6VE are both variable-displacement axial piston motors featuring a bent-axis design—a specialty of Bosch Rexroth. Unlike swashplate-type designs, this configuration adjusts displacement—the volume of fluid consumed per revolution—by varying the angle of the cylinder block relative to the drive shaft.

That one adjustment gives you two operating modes:

High displacement: more torque, lower speed. This is for climbing, digging while tracking, and pushing.

Low displacement: less torque, higher speed. This is for relocating across a site or travelling on a road.

Why Bent-Axis Motors Suit CNH Construction Equipment

Torque and Efficiency Under Load

Bent-axis designs are known for good starting torque and strong volumetric and mechanical efficiency across a wide speed range. On a loaded excavator or dozer tracking up a ramp, that translates into smoother pull-away and less wasted energy as heat.

Robustness in Dirty, High-Shock Environments

Construction machines don't live in clean rooms. Shock loads, contaminated oil, and heavy-duty cycles are normal. Bent-axis motors tolerate high speeds and pressure peaks well, provided the oil stays clean, which brings us to maintenance.

Wide Displacement Range

Variable displacement lets one motor replace what would otherwise take a two-speed gearbox or a more complicated drivetrain. For CNH machines that need both fine low-speed control and fast repositioning, that flexibility is valuable.

Key Technical Considerations Before Choosing a Replacement

Size (Displacement)

Rexroth sizes are named by maximum displacement in cm³/rev. A mismatch changes travel speed and torque, and can overload the final drive.

Series and Version

Series number affects pressure ratings, speed limits, and porting. Never assume that "A6VM" alone is enough to identify a part.

Control Type

Common control concepts include hydraulic, pressure-dependent, and electro-proportional controls. The control must match what your machine's hydraulic circuit and electronics expect.

Mounting Flange, Shaft, and Ports

Check flange pattern, spline type, and port orientation. Many failed installations come down to a motor that is "almost" right.

Open vs. Closed Circuit

Motor selection should reflect the circuit type, since flushing and case-drain requirements differ.

Maintenance Practices That Extend Motor Life

Keep oil clean. Contamination is the leading cause of premature wear in axial piston units. Follow the recommended cleanliness class and change filters on schedule.

Warm up properly. Cold, thick oil causes cavitation and starves the motor.

Use the correct fluid. Viscosity range matters for lubrication and efficiency.

Flush after failures. If a pump or motor failed, debris travels downstream. Flush the circuit before fitting new components.

Check case-drain lines. Kinked or restricted lines raise case pressure and kill seals.

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Q1: Why is my machine slow in high-speed travel?

A1: Typical causes are a control that fails to reach minimum displacement, low supply pressure, internal leakage, or electrical faults on electro-proportional versions.

Q2: What information do I need to order the right one?

A2: The full nameplate model code, serial number, your machine's make, model, and serial number, and photos of the flange, shaft, and ports.

Q3: What is the price and delivery time of the Rexroth A6VM/A6VE motor for CNH Engineering Equipment?

A3: The specific price and delivery time will depend on the equipment model or specific product model you provide.

Q4: How to purchase a Rexroth A6VM/A6VE motor for CNH Engineering Equipment?

A4:You can visit https://www.baolilaihydraulic.com/contact/ to contact us and purchase our products through various methods.