Rexroth A6VE variable hydraulic motor for Bonfiglioli Excavator 1T833063400 1T833063809 1T833063424 1T833063868 1T833063873 1T833063950 DTBO09665

The A6VE is an axial piston motor designed on a bent-axis principle, rather than the more conventional swashplate layout. Instead of pistons reciprocating parallel to the drive shaft, the cylinder block is angled relative to the shaft, and the pistons push against the shaft flange at that angle. This geometry naturally reduces internal friction and supports higher starting torque with a sturdier bearing arrangement, which tends to extend service life under demanding conditions.

How the A6VE Fits Into a Bonfiglioli Excavator Travel Drive

Bonfiglioli's excavator final drives pair a planetary gear reduction with a hydraulic motor to convert high-speed, low-torque hydraulic flow into the low-speed, high-torque output needed to turn a track sprocket. The A6VE is a frequent factory-fit and aftermarket choice for that motor position on Bonfiglioli units used across excavators from roughly 15 to 50+ tonnes, depending on the specific drive model.

Control Options: Reading the Type Code

The type code stamped on the motor's nameplate tells you almost everything about how it behaves, and matching it correctly is critical when replacing a unit on a Bonfiglioli drive.

 Proportional Hydraulic Control (HD1, HD2, HA1, HA2 families)

Series 63 motors are offered with proportional hydraulic control at a pressure differential of either 10 bar or 25 bar, giving smooth, infinitely variable displacement changes proportional to pilot pressure at the control port. This is the most common setup for travel drives where the operator wants a natural, progressive feel rather than a hard step between speeds.

Two-Point Control (HZ, HZ1)

Certain sizes support a simple two-point hydraulic control, switching the motor between two fixed displacement settings rather than a continuous range. This is a simpler, more rugged option for machines where only "low range" and "high range" travel speeds are needed.

Electro-Hydraulic Proportional Control with Feedback (EZ and similar)

On higher-spec control types, an electro-hydraulic proportional control includes a position feedback sensor, creating a closed-loop system that allows very precise, repeatable displacement adjustment. This is more common on machines with sophisticated electronic control systems that actively manage travel speed based on load sensing or operator input curves.

Circuit Type: Open vs. Closed Loop

The A6VE is built to work in either configuration, and Bonfiglioli travel drives use both depending on the machine's overall hydraulic architecture.

Closed-circuit systems: The motor's inlet and outlet connect directly to a variable pump in a closed loop, typical of dedicated hydrostatic travel circuits.

Open-circuit systems: Flow comes from a shared pump through a directional valve, more common on machines where travel shares hydraulic capacity with other functions.

The A6VE line is engineered to handle both configurations without a different base casting, which simplifies sourcing when a machine's hydraulic architecture isn't obvious from the outside.

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Q1: Can an A6VE from one series replace a different series on the same Bonfiglioli drive?

A1: Generally, no, without confirming flange dimensions, spline count, and displacement range against the gearbox manufacturer's specification. Series 63, 65, and 71 differ in pressure rating and physical dimensions, even at similar displacement sizes.

Q2: How do I identify the exact control type on an existing motor without the original paperwork?

A2: The nameplate type code is the most reliable source. If it's illegible, the physical control valve body, port arrangement, and any sensor wiring present can usually narrow it down with reference to the relevant Rexroth data sheet for that series.

Q3:What is the price and delivery time of the A6VE hydraulic motor for the Bonfiglioli Excavator？

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

Q4:How to purchase an A6VE hydraulic motor for a Bonfiglioli Excavator?

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