Bosch Rexroth A6VE variable hydraulic pump for the Dynapac Paver 4700390603 4812026519 D966025361 D966025364

In a Dynapac paver, the A6VE typically shows up in the propel (travel) drive circuit, converting hydraulic flow from the paver's variable pump into rotational output that turns the tracks or wheels. Because it's a variable unit, its swashplate angle — and therefore its displacement — changes on the fly to trade torque for speed or vice versa.

How the A6VE Fits Into a Dynapac Paver's Hydraulic System

A modern Dynapac paver — whether it's a compact model like the SD1500 series or a larger highway-class unit — runs several independent hydraulic circuits: propel/travel, screed vibration, auger feed, and steering. The propel circuit is a closed-loop system pairing a variable displacement pump (often an A4VG or A10VG) with one or two A6VE motors mounted at the tracks or wheel hubs.

Example workflow in a tracked paver:

1. The diesel engine drives the main variable pump.

2. The operator's speed command adjusts pump displacement, sending high-pressure oil to the A6VE motors.

3. Each A6VE's swashplate angle adjusts automatically — larger displacement for low-speed, high-torque paving moves; smaller displacement for faster relocation travel.

4. An electro-hydraulic or hydraulic control (DA, EP, or HD control, depending on the series) manages this swivel angle in response to load and pressure.

This is why a failing A6VE often shows up as uneven tracking, one side pulling harder than the other, or a paver that can't reach its rated travel speed even though the main pump tests fine.

Typical Application Points on Dynapac Machines

Track drive motors on tracked pavers (e.g., certain DF and SD series)

Wheel hub drive motors on wheeled paver variants

Occasionally paired with planetary final drives, where the A6VE plugs directly into the gearbox housing

Key Technical Characteristics

While exact figures vary by size code (A6VE55, A6VE80, A6VE107, A6VE160, and so on) and series revision, the family shares a common design philosophy worth understanding before you order a replacement or reman unit.

Displacement and Sizing

The A6VE is available across a wide displacement range, and the size number in the model code (approximately the displacement in cm³ per revolution) tells you which one you're dealing with. Getting this number wrong is the single most common ordering mistake — an A6VE107 and an A6VE160 are not interchangeable, even though they look similar on a parts shelf.

Pressure Ratings

Bent-axis A6V units are rated for high nominal pressures, with peak pressures well above typical swashplate pumps of similar size — this is one of the design's core advantages in demanding travel-drive duty cycles where pressure spikes occur during starts, stops, and load changes.

Control Options: Depending on the control code ordered, the A6VE can be found with:

DA control – hydraulic two-position or proportional control tied to the travel direction valve

EP control – electro-proportional control, common on pavers with electronic drive management

HD control – automatic high-pressure-related control that swivels the unit toward larger displacement as load increases, protecting the driveline from stalling

Matching the control type on a replacement unit to the original is critical — an EP-control unit won't simply bolt in for a DA-control unit without matching the paver's control wiring or hydraulic piloting.

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Q1: Which Dynapac models use the A6VE?

A1: It's most commonly found in the propel circuits of tracked and wheeled paver models, typically paired with a variable displacement pump such as an A4VG or A10VG. Exact application depends on model year and configuration, so always verify against your paver's specific parts manual.

Q2: What causes an A6VE to lose displacement or fail to reach full swivel angle?

A2: Worn servo pistons, a damaged control valve spool, or internal contamination are the usual culprits. A pressure and flow test on a hydraulic bench will usually confirm whether the issue is in the control section or the rotary group itself.

Q3: What is the price and delivery time of the A6VE hydraulic motor for the Dynapac Paver？

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 Dynapac Paver?

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